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subtitle.im

Chrome extension to control YouTube captions and detect burned-in subtitles

Good for Bots: Fair, 68 of 100Get this badge →

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What is subtitle.im?

subtitle.im is a Chrome browser extension designed for desktop YouTube users who want to control video captions automatically. The extension detects burned-in subtitles locally using optical character recognition and manages switchable YouTube captions based on user preferences. It offers global settings alongside channel and video rules to automatically open, close, or follow YouTube captions, and provides handling options when burned-in subtitles and switchable captions appear in different languages. The tool is available with a free tier covering a limited number of successful video handling instances, as well as paid annual and lifetime Pro subscriptions.

Through a bot’s eyes

“subtitle.im is a Chrome extension that automatically controls YouTube captions and detects local burned-in subtitles.”

Simulated from the response GoodForBotsBot received on , not a live answer from any AI assistant.

What it can read, and what stays hidden →

What a bot can read

The input provides detailed homepage text and an llms.txt file covering the product features, installation context, privacy practices, and pricing plans. A language model reading the text learns how the extension detects burned-in subtitles locally without uploading video frames, how caption controls operate at global, channel, and video levels, and how different language conflicts are resolved. The homepage explicitly details pricing, offering a free tier with ten successfully handled videos, a Pro annual subscription priced at seventeen dollars and ninety-nine cents per year, and a Pro Lifetime option priced at twenty-nine dollars and ninety-nine cents. It also outlines clear documentation references through the llms.txt file, detailing links to setup guides, FAQs, privacy policies, terms of service, and translated versions. Visitor questions regarding allowances, refunds, and manual overrides are comprehensively answered in the text.

Good for Bots report

subtitle.im scores 68 of 100: 40 of the 50 base points, 28 of the 50 agent-layer points, no penalties.

Earned

40 of the 50 base points above the line, 28 of the 50 agent-layer points below it.

68
23

Still open

Behind the checks below, with prompts in Pro.

9
Penalties0
How scoring works · current methodology →

For the owner of subtitle.im

3 prompts, 23 points

They are in the owner view, ready to paste into Claude Code, Cursor or Codex, beside the badge and rescans.

Open the owner view →

All 36 checks

Evidence for each, in Markdown →

Select a check to see what we found and how it is graded.

Readable base

40.4 / 50

Passes.

3.3 of 3.3 points.

robots.txt is valid, with 1 user-agent group.

Passes.

8.3 of 8.3 points.

Sitemap declared in robots.txt, listing 72 URLs.

Fails.

0 of 8.3 points.

1 of 4 pages read pass. The homepage publishes no structured data at all: no JSON-LD, no microdata, no RDFa.

Passes.

10 of 10 points.

All 4 pages read pass. The homepage marks its content root, its heading outline and its landmarks.

Passes.

8.3 of 8.3 points.

5 of 5 assessed homepage navigation links expose usable destinations.

Passes.

4.2 of 4.2 points.

190 of 190 assessed homepage links and buttons have a nonempty accessible name.

Passes.

2.5 of 2.5 points.

1 of 1 assessed homepage form fields meet the static naming and field-semantics checks.

Half passes.

1.3 of 2.5 points.

199 of 200 assessed homepage controls and role declarations meet the static role, state and relationship checks.

Prompt in Pro →
Passes.

1.7 of 1.7 points.

All 4 pages read pass. The homepage declares itself as its canonical URL.

Agent layer

27.5 / 50

Passes.

11.3 of 11.3 points.

/llms.txt is well formed: 13 links across 2 sections.

Half passes.

3.8 of 7.5 points.

/llms.txt is partly descriptive: only 38% of links carry a description.

Prompt in Pro →
Passes.

12.5 of 12.5 points.

llms.txt points at 5 markdown versions of pages.

Fails.

0 of 10 points.

None of the 4 pages read pass. Asking the homepage for markdown still returns text/html.

Fails.

0 of 5 points.

robots.txt names no AI crawlers, so every operator has to guess.

Fails.

0 of 2.5 points.

No usage declaration found in robots.txt or the final successful homepage response header.

Prompt in Pro →

Penalties

− 0

Passes.

Penalty: 0 of 15 points.

Our crawler reaches the page without being challenged.

Passes.

Penalty: 0 of 20 points.

Nothing on the homepage tells a crawler to skip it or to withhold its snippet.

Passes.

Penalty: 0 of 25 points.

The captured homepage HTML contains 1171 content words; completeness is not assessed.

Passes.

Penalty: 0 of 25 points.

robots.txt allows every known search and user-fetch crawler to reach the homepage.

Passes.

Penalty: 0 of 10 points.

The homepage is served over HTTPS and returns HTTP 200.

Passes.

Penalty: 0 of 3 points.

The homepage provides both a non-empty title and meta description.

Passes.

Penalty: 0 of 3 points.

The homepage is reached in 0 redirects.

Passes.

Penalty: 0 of 3 points.

The homepage reached a plain crawler in 111 ms.

Agent capabilities

0 of 11 · no points

Each one found adds +1 to the badge.

Not applicable.

Adds +1 to the badge when found.

No API catalog published.

Not applicable.

Adds +1 to the badge when found.

No /auth.md published.

Not applicable.

Adds +1 to the badge when found.

No AI Catalog published, so no MCP server card can be discovered.

Not applicable.

Adds +1 to the badge when found.

No A2A Agent Card at /.well-known/agent-card.json, and none listed in an AI Catalog.

Not applicable.

Adds +1 to the badge when found.

No usable Agent Skills index was found at either well-known path or in the AI Catalog.

Not applicable.

Adds +1 to the badge when found.

No WebMCP declarations were found in the collected HTML or inline scripts. External scripts were not inspected.

Not applicable.

Adds +1 to the badge when found.

No Web Bot Auth key directory at /.well-known/http-message-signatures-directory.

Not applicable.

Adds +1 to the badge when found.

No HTTP 402 payment challenge on the homepage or robots.txt, and no manifest at /.well-known/x402.

Not applicable.

Adds +1 to the badge when found.

No ACP discovery declaration established at /.well-known/acp.json.

Not applicable.

Adds +1 to the badge when found.

No UCP discovery declaration established at /.well-known/ucp.

Not applicable.

Adds +1 to the badge when found.

No public AMP discovery declaration established. Private or hidden agents may not advertise one to our crawler.

Readable base · subtitle.im

robots.txt

robots.txt is present and valid

Passes3.3 of 3.3 points

What we found

robots.txt is valid, with 1 user-agent group.

Crawler groups
1
Directives
3
Sitemap declarations
1

Parser findings

No parser errors recorded

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "errors": [],
  "groups": 1,
  "sitemaps": 1,
  "directives": 3
}

Related checks

See sites that pass robots.txt →Check again: robots.txt checker →Guide: How to write robots.txt rules for AI crawlers →
Methodology →

Readable base · subtitle.im

Sitemap

Sitemap is present and parses

Passes8.3 of 8.3 points

What we found

Sitemap declared in robots.txt, listing 72 URLs.

URLs collected
72
Documents checked
1
Discovery via robots.txt
Declared

Sitemap sample

  • https://subtitle.im/sitemap.xml · 72 URLs
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "urlCount": 72,
  "documents": [
    {
      "url": "https://subtitle.im/sitemap.xml",
      "kind": "urlset",
      "urls": 72,
      "error": null,
      "valid": true,
      "children": 0,
      "compressed": false
    }
  ],
  "declaredInRobots": true
}

Related checks

See sites that pass Sitemap →
Methodology →

Readable base · subtitle.im

schema.org JSON-LD

Describes itself to machines with schema.org JSON-LD

Fails0 of 8.3 points

What we found

1 of 4 pages read pass. The homepage publishes no structured data at all: no JSON-LD, no microdata, no RDFa.

Pages read

Each page is checked on its own; the median page decides. Types and counts below cover every page read.

  • Fails: Homepage

    The homepage publishes no structured data at all: no JSON-LD, no microdata, no RDFa.

  • Passes: /blog/smart-auto-toggle-youtube-subtitles/

    The page at /blog/smart-auto-toggle-youtube-subtitles/ describes itself to machines as Article, Organization, BreadcrumbList in valid schema.org JSON-LD.

  • Fails: /blog/

    The page at /blog/ publishes no structured data at all: no JSON-LD, no microdata, no RDFa.

  • Fails: /help/

    The page at /help/ publishes no structured data at all: no JSON-LD, no microdata, no RDFa.

Entities
5
Valid JSON-LD blocks
2
Pages examined
4

JSON-LD types

  • Article
  • Organization
  • BreadcrumbList
  • ListItem

How to fix

+8.3score from 78 to 86
Copy the prompt in the owner view →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "nodes": 5,
  "pages": [
    {
      "url": "https://subtitle.im/",
      "reason": "none",
      "status": "fail",
      "summary": "The homepage publishes no structured data at all: no JSON-LD, no microdata, no RDFa.",
      "homepage": true
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "reason": "ok",
      "status": "pass",
      "summary": "The page at /blog/smart-auto-toggle-youtube-subtitles/ describes itself to machines as Article, Organization, BreadcrumbList in valid schema.org JSON-LD.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/blog/",
      "reason": "none",
      "status": "fail",
      "summary": "The page at /blog/ publishes no structured data at all: no JSON-LD, no microdata, no RDFa.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/help/",
      "reason": "none",
      "status": "fail",
      "summary": "The page at /help/ publishes no structured data at all: no JSON-LD, no microdata, no RDFa.",
      "homepage": false
    }
  ],
  "types": [
    "Article",
    "Organization",
    "BreadcrumbList",
    "ListItem"
  ],
  "blocks": 2,
  "reason": "none",
  "contexts": [
    "https://schema.org"
  ],
  "rdfaTypes": [],
  "truncated": false,
  "validBlocks": 2,
  "brokenBlocks": [],
  "unknownTypes": [],
  "pagesExamined": 4,
  "skippedBlocks": 0,
  "topLevelNodes": 2,
  "microdataTypes": [],
  "missingProperties": [],
  "unnamedTopLevelTypes": [
    "BreadcrumbList"
  ]
}

Related checks

See sites that pass schema.org JSON-LD →
Methodology →

Readable base · subtitle.im

Semantic HTML

Content is marked up so a reader can find it

Passes10 of 10 points

What we found

All 4 pages read pass. The homepage marks its content root, its heading outline and its landmarks.

Pages read

Each page is checked on its own; the median page decides. The measurements below describe the homepage.

  • Passes: Homepage

    The homepage marks its content root, its heading outline and its landmarks.

  • Passes: /blog/smart-auto-toggle-youtube-subtitles/

    The page at /blog/smart-auto-toggle-youtube-subtitles/ marks its content root, its heading outline and its landmarks.

  • Passes: /blog/

    The page at /blog/ marks its content root, its heading outline and its landmarks.

  • Passes: /help/

    The page at /help/ marks its content root, its heading outline and its landmarks.

Extracted words
1,135
Headings
14
H1 headings
1

Content and navigation

Share of extracted homepage words by marked region. Navigation inside a header, footer or main region is counted once, under navigation.

Extracted words and their share by page region
RegionWordsShare
Main region1,08195.24%
Navigation40.35%
Page header141.23%
Page footer332.91%
Other text30.26%

21 words appear before the first main-region text in HTML order.

Diagnostic only; it does not affect the score. Recognised hidden text and script payloads are excluded. Stylesheet visibility and repetition across pages are unknown. A large menu is not necessarily a problem.

Heading outline · first 4

  • H1YouTube captions,on when needed, off when they get in the way.
  • H2Keep captions onor off, automatically
  • H2When burned-in subtitles and YouTube captionsuse different languages, choose how to handle them
  • H2Set preferences at every level,down to a single video

10 more headings recorded

Page landmarks

  • banner
  • contentinfo
  • navigation
  • region
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "gaps": [],
  "pages": [
    {
      "url": "https://subtitle.im/",
      "reason": "structured",
      "status": "pass",
      "summary": "The homepage marks its content root, its heading outline and its landmarks.",
      "homepage": true
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "reason": "structured",
      "status": "pass",
      "summary": "The page at /blog/smart-auto-toggle-youtube-subtitles/ marks its content root, its heading outline and its landmarks.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/blog/",
      "reason": "structured",
      "status": "pass",
      "summary": "The page at /blog/ marks its content root, its heading outline and its landmarks.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/help/",
      "reason": "structured",
      "status": "pass",
      "summary": "The page at /help/ marks its content root, its heading outline and its landmarks.",
      "homepage": false
    }
  ],
  "roots": [
    {
      "words": 1168,
      "source": "element",
      "hierarchicallyCorrect": true
    }
  ],
  "reason": "structured",
  "h1Count": 1,
  "headings": [
    {
      "text": "YouTube captions,on when needed, off when they get in the way.",
      "empty": false,
      "level": 1
    },
    {
      "text": "Keep captions onor off, automatically",
      "empty": false,
      "level": 2
    },
    {
      "text": "When burned-in subtitles and YouTube captionsuse different languages, choose how to handle them",
      "empty": false,
      "level": 2
    },
    {
      "text": "Set preferences at every level,down to a single video",
      "empty": false,
      "level": 2
    },
    {
      "text": "Captions are handled locally,so you can watch with confidence.",
      "empty": false,
      "level": 2
    },
    {
      "text": "Choose your plan",
      "empty": false,
      "level": 2
    },
    {
      "text": "Free",
      "empty": false,
      "level": 3
    },
    {
      "text": "Pro subscription",
      "empty": false,
      "level": 3
    },
    {
      "text": "Pro Lifetime",
      "empty": false,
      "level": 3
    },
    {
      "text": "FAQ",
      "empty": false,
      "level": 2
    },
    {
      "text": "Listed on",
      "empty": false,
      "level": 2
    },
    {
      "text": "Product",
      "empty": false,
      "level": 3
    },
    "… 2 more items"
  ],
  "bodyWords": 1222,
  "landmarks": [
    {
      "role": "banner",
      "named": false,
      "source": "native",
      "element": "header"
    },
    {
      "role": "navigation",
      "named": true,
      "source": "native",
      "element": "nav"
    },
    {
      "role": "region",
      "named": true,
      "source": "native",
      "element": "section"
    },
    {
      "role": "region",
      "named": true,
      "source": "role",
      "element": "div"
    },
    {
      "role": "contentinfo",
      "named": false,
      "source": "native",
      "element": "footer"
    }
  ],
  "textRatio": 0.0244,
  "truncated": false,
  "articleCount": 3,
  "contentWords": 1171,
  "headingCount": 14,
  "headingSkips": [],
  "requirements": {
    "landmarks": true,
    "contentRoot": true,
    "headingOutline": true
  },
  "landmarkRoles": [
    "banner",
    "contentinfo",
    "navigation",
    "region"
  ],
  "hiddenMainCount": 0,
  "textComposition": {
    "words": {
      "main": 1081,
      "other": 3,
      "footer": 33,
      "header": 14,
      "navigation": 4
    },
    "shares": {
      "main": 0.9524229074889868,
      "other": 0.0026431718061674008,
      "footer": 0.02907488986784141,
      "header": 0.012334801762114538,
      "navigation": 0.003524229074889868
    },
    "version": 1,
    "truncated": false,
    "totalWords": 1135,
    "analysisLimited": false,
    "mainRegionCount": 1,
    "wordsBeforeMain": 21
  },
  "emptyHeadingCount": 0,
  "misnestedMainCount": 0
}

Related checks

See sites that pass Semantic HTML →
Methodology →

Readable base · subtitle.im

Crawlable navigation

Navigation links expose usable destinations

Passes8.3 of 8.3 points

What we found

5 of 5 assessed homepage navigation links expose usable destinations.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "good": 5,
  "page": "homepage",
  "total": 5,
  "reason": "observed-gaps",
  "limited": false,
  "examples": [],
  "truncated": false,
  "skippedContactLinks": 0,
  "brokenLabelReferences": 0
}

Related checks

See sites that pass Crawlable navigation →
Methodology →

Readable base · subtitle.im

Named links and buttons

Links and buttons have accessible names

Passes4.2 of 4.2 points

What we found

190 of 190 assessed homepage links and buttons have a nonempty accessible name.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "good": 190,
  "page": "homepage",
  "total": 190,
  "reason": "observed-gaps",
  "limited": false,
  "examples": [],
  "truncated": false,
  "skippedContactLinks": 0,
  "brokenLabelReferences": 0
}

Related checks

See sites that pass Named links and buttons →
Methodology →

Readable base · subtitle.im

Named form fields

Form fields have names and recognizable semantics

Passes2.5 of 2.5 points

What we found

1 of 1 assessed homepage form fields meet the static naming and field-semantics checks.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "good": 1,
  "page": "homepage",
  "total": 1,
  "reason": "observed-gaps",
  "limited": false,
  "examples": [],
  "truncated": false,
  "nativeForms": 0,
  "submitControls": 0,
  "inputTypeFallbacks": 0,
  "formsWithoutSubmitControl": 0
}

Related checks

See sites that pass Named form fields →
Methodology →

Readable base · subtitle.im

Control roles and states

Controls expose roles, states and relationships

Half passes1.3 of 2.5 points

What we found

199 of 200 assessed homepage controls and role declarations meet the static role, state and relationship checks.

How to fix

The prompt is in Pro →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "good": 199,
  "page": "homepage",
  "total": 200,
  "reason": "observed-gaps",
  "limited": false,
  "examples": [
    {
      "id": "",
      "href": null,
      "issue": "broken-aria-controls",
      "element": "button"
    }
  ],
  "truncated": false
}

Related checks

See sites that pass Control roles and states →
Methodology →

Readable base · subtitle.im

Canonical URL

Each page declares one usable canonical URL

Passes1.7 of 1.7 points

What we found

All 4 pages read pass. The homepage declares itself as its canonical URL.

Pages read

Each page is checked on its own; the median page decides. The measurements below describe the homepage.

  • Passes: Homepage

    The homepage declares itself as its canonical URL.

  • Passes: /blog/smart-auto-toggle-youtube-subtitles/

    The page at /blog/smart-auto-toggle-youtube-subtitles/ declares itself as its canonical URL.

  • Passes: /blog/

    The page at /blog/ declares itself as its canonical URL.

  • Passes: /help/

    The page at /help/ declares itself as its canonical URL.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "pages": [
    {
      "url": "https://subtitle.im/",
      "reason": "declared",
      "status": "pass",
      "summary": "The homepage declares itself as its canonical URL.",
      "homepage": true
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "reason": "declared",
      "status": "pass",
      "summary": "The page at /blog/smart-auto-toggle-youtube-subtitles/ declares itself as its canonical URL.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/blog/",
      "reason": "declared",
      "status": "pass",
      "summary": "The page at /blog/ declares itself as its canonical URL.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/help/",
      "reason": "declared",
      "status": "pass",
      "summary": "The page at /help/ declares itself as its canonical URL.",
      "homepage": false
    }
  ],
  "reason": "declared",
  "target": "https://subtitle.im/",
  "readings": [
    {
      "url": "https://subtitle.im/",
      "target": "https://subtitle.im/",
      "relative": false,
      "crossHost": false,
      "truncated": false,
      "duplicates": 0,
      "declarations": [
        {
          "url": "https://subtitle.im/",
          "href": "https://subtitle.im/",
          "source": "head"
        }
      ],
      "selfReference": true,
      "invalidDeclarations": 0
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "target": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "relative": false,
      "crossHost": false,
      "truncated": false,
      "duplicates": 0,
      "declarations": [
        {
          "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
          "href": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
          "source": "head"
        }
      ],
      "selfReference": true,
      "invalidDeclarations": 0
    },
    {
      "url": "https://subtitle.im/blog/",
      "target": "https://subtitle.im/blog/",
      "relative": false,
      "crossHost": false,
      "truncated": false,
      "duplicates": 0,
      "declarations": [
        {
          "url": "https://subtitle.im/blog/",
          "href": "https://subtitle.im/blog/",
          "source": "head"
        }
      ],
      "selfReference": true,
      "invalidDeclarations": 0
    },
    {
      "url": "https://subtitle.im/help/",
      "target": "https://subtitle.im/help/",
      "relative": false,
      "crossHost": false,
      "truncated": false,
      "duplicates": 0,
      "declarations": [
        {
          "url": "https://subtitle.im/help/",
          "href": "https://subtitle.im/help/",
          "source": "head"
        }
      ],
      "selfReference": true,
      "invalidDeclarations": 0
    }
  ],
  "relative": false,
  "crossHost": false,
  "truncated": false,
  "duplicates": 0,
  "declarations": [
    {
      "url": "https://subtitle.im/",
      "href": "https://subtitle.im/",
      "source": "head"
    }
  ],
  "selfReference": true,
  "invalidDeclarations": 0
}

Related checks

See sites that pass Canonical URL →
Methodology →

Readable base · subtitle.im

Working section links

Section links reach an element on the page

Passes0.8 of 0.8 points

What we found

All 4 pages read pass. The homepage has 2 section links, and every one reaches an element on the page.

Each page is checked on its own; the median page decides. The measurements below describe the homepage.

  • Passes: Homepage

    The homepage has 2 section links, and every one reaches an element on the page.

  • Passes: /blog/smart-auto-toggle-youtube-subtitles/

    The page at /blog/smart-auto-toggle-youtube-subtitles/ has 1 section link, and every one reaches an element on the page.

  • Passes: /blog/

    The page at /blog/ has 1 section link, and every one reaches an element on the page.

  • Passes: /help/

    The page at /help/ has 5 section links, and every one reaches an element on the page.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "pages": [
    {
      "url": "https://subtitle.im/",
      "reason": "working",
      "status": "pass",
      "summary": "The homepage has 2 section links, and every one reaches an element on the page.",
      "homepage": true
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "reason": "working",
      "status": "pass",
      "summary": "The page at /blog/smart-auto-toggle-youtube-subtitles/ has 1 section link, and every one reaches an element on the page.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/blog/",
      "reason": "working",
      "status": "pass",
      "summary": "The page at /blog/ has 1 section link, and every one reaches an element on the page.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/help/",
      "reason": "working",
      "status": "pass",
      "summary": "The page at /help/ has 5 section links, and every one reaches an element on the page.",
      "homepage": false
    }
  ],
  "reason": "working",
  "readings": [
    {
      "top": 0,
      "url": "https://subtitle.im/",
      "working": 2,
      "assessed": 2,
      "examples": [],
      "truncated": false,
      "baseElsewhere": 0,
      "missingTarget": 0,
      "textDirectives": 0,
      "scriptAddresses": 0
    },
    {
      "top": 0,
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "working": 1,
      "assessed": 1,
      "examples": [],
      "truncated": false,
      "baseElsewhere": 0,
      "missingTarget": 0,
      "textDirectives": 0,
      "scriptAddresses": 0
    },
    {
      "top": 0,
      "url": "https://subtitle.im/blog/",
      "working": 1,
      "assessed": 1,
      "examples": [],
      "truncated": false,
      "baseElsewhere": 0,
      "missingTarget": 0,
      "textDirectives": 0,
      "scriptAddresses": 0
    },
    {
      "top": 0,
      "url": "https://subtitle.im/help/",
      "working": 5,
      "assessed": 5,
      "examples": [],
      "truncated": false,
      "baseElsewhere": 0,
      "missingTarget": 0,
      "textDirectives": 0,
      "scriptAddresses": 0
    }
  ]
}

Related checks

See sites that pass Working section links →
Methodology →

Agent layer · subtitle.im

llms.txt

llms.txt is present and well formed

Passes11.3 of 11.3 points

What we found

/llms.txt is well formed: 13 links across 2 sections.

Links
13
Sections
2
Characters
3,441
Document title
subtitle.im
Opening summary
Present

Parser findings

No parser errors recorded

File contents are not shown here.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "links": 13,
  "title": "subtitle.im",
  "errors": [],
  "sections": 2,
  "charLength": 3441,
  "hasSummary": true,
  "sectionsWithLinks": 2
}

Related checks

See sites that pass llms.txt →Check again: llms.txt checker →Guide: How to write a useful llms.txt →
Methodology →

Agent layer · subtitle.im

Descriptive llms.txt

llms.txt is descriptive, not a bare link list

Half passes3.8 of 7.5 points

What we found

/llms.txt is partly descriptive: only 38% of links carry a description.

Links
13
Characters
3,441
Links with descriptions
5
Opening summary
Present
Additional context
Present

File contents are not shown here.

How to fix

The prompt is in Pro →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "links": 13,
  "reason": "partly-described",
  "charLength": 3441,
  "hasDetails": true,
  "hasSummary": true,
  "describedLinks": 5,
  "descriptionRatio": 0.38,
  "unconventionalSeparators": 0
}

Related checks

See sites that pass Descriptive llms.txt →Check again: llms.txt checker →Guide: How to write a useful llms.txt →
Methodology →

Agent layer · subtitle.im

llms-full.txt or .md pages

Serves markdown at its own URL

Passes12.5 of 12.5 points

What we found

llms.txt points at 5 markdown versions of pages.

Bytes received
0
Markdown links in llms.txt
5

Response receivedHTTP 404

Full-text file
Not usable
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "llmsFullTxt": {
    "status": 404,
    "usable": false,
    "rejected": null,
    "truncated": false,
    "byteLength": 0
  },
  "markdownLinksInLlmsTxt": 5
}

Related checks

See sites that pass llms-full.txt or .md pages →Check again: llms.txt checker →Guide: How to write a useful llms.txt →
Methodology →

Agent layer · subtitle.im

Markdown negotiation

Serves markdown when asked for it

Fails0 of 10 points

What we found

None of the 4 pages read pass. Asking the homepage for markdown still returns text/html.

Pages read

Each page is checked on its own; the median page decides. The measurements below describe the homepage.

  • Fails: Homepage

    Asking the homepage for markdown still returns text/html.

  • Fails: /blog/smart-auto-toggle-youtube-subtitles/

    Asking the page at /blog/smart-auto-toggle-youtube-subtitles/ for markdown still returns text/html.

  • Fails: /blog/

    Asking the page at /blog/ for markdown still returns text/html.

  • Fails: /help/

    Asking the page at /help/ for markdown still returns text/html.

Response characters
340,060

Response received

Content-Type: text/html

Vary: Accept
Not found

How to fix

+10score from 68 to 78
Copy the prompt in the owner view →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "vary": "Cookie, Accept-Language",
  "pages": [
    {
      "url": "https://subtitle.im/",
      "reason": "not-markdown",
      "status": "fail",
      "summary": "Asking the homepage for markdown still returns text/html.",
      "homepage": true
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "reason": "not-markdown",
      "status": "fail",
      "summary": "Asking the page at /blog/smart-auto-toggle-youtube-subtitles/ for markdown still returns text/html.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/blog/",
      "reason": "not-markdown",
      "status": "fail",
      "summary": "Asking the page at /blog/ for markdown still returns text/html.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/help/",
      "reason": "not-markdown",
      "status": "fail",
      "summary": "Asking the page at /help/ for markdown still returns text/html.",
      "homepage": false
    }
  ],
  "reason": "not-markdown",
  "charset": null,
  "variant": null,
  "bodyLength": 340060,
  "contentType": "text/html",
  "variesOnAccept": false
}

Related checks

See sites that pass Markdown negotiation →Guide: How to serve Markdown to AI agents with content negotiation →
Methodology →

Agent layer · subtitle.im

AI crawler rules

States a position on AI crawlers

Fails0 of 5 points

What we found

robots.txt names no AI crawlers, so every operator has to guess.

Named AI crawlers
0
Wildcard rule at /
Does not block crawling

Allowed at /

None recorded

Blocked at /

None recorded

Declared purposes

None recorded

How to fix

+5score from 86 to 91
Copy the prompt in the owner view →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "allowed": [],
  "blocked": [],
  "purposes": [],
  "crawlersNamed": 0,
  "wildcardBlocksEverything": false
}

Related checks

See sites that pass AI crawler rules →Check again: robots.txt checker →Guide: How to write robots.txt rules for AI crawlers →
Methodology →

Agent layer · subtitle.im

Content Signals

Declares AI usage preferences

Fails0 of 2.5 points

What we found

No usage declaration found in robots.txt or the final successful homepage response header.

Preference vocabularies

None recorded

Content-Signal declarations

None recorded

Content-Usage declarations

None recorded

How to fix

The prompt is in Pro →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "carriers": [],
  "contentUsage": [],
  "vocabularies": [],
  "contentSignal": [],
  "contentUsageHeader": null,
  "recognisedUsageCategories": [],
  "recognisedSignalCategories": []
}

Related checks

See sites that pass Content Signals →Check again: robots.txt checker →Guide: How to write robots.txt rules for AI crawlers →
Methodology →

Agent layer · subtitle.im

Typed links

Advertises machine-readable resources with typed links

Fails0 of 1.3 points

What we found

2 of 4 pages read pass. The page at /blog/smart-auto-toggle-youtube-subtitles/'s links are all ordinary page furniture; none point an agent anywhere.

Each page is checked on its own; the median page decides. The measurements below describe the homepage.

  • Passes: Homepage

    The homepage points at a markdown version of itself through a Link header, alongside 1 other discovery relation.

  • Fails: /blog/smart-auto-toggle-youtube-subtitles/

    The page at /blog/smart-auto-toggle-youtube-subtitles/'s links are all ordinary page furniture; none point an agent anywhere.

  • Fails: /blog/

    The page at /blog/'s links are all ordinary page furniture; none point an agent anywhere.

  • Passes: /help/

    The page at /help/ points at a markdown version of itself through a Link header, alongside 1 other discovery relation.

Links inspected
24

Discovery relations

  • alternate
  • describedby

How to fix

The prompt is in Pro →
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "pages": [
    {
      "url": "https://subtitle.im/",
      "reason": "markdown-alternate",
      "status": "pass",
      "summary": "The homepage points at a markdown version of itself through a Link header, alongside 1 other discovery relation.",
      "homepage": true
    },
    {
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "reason": "ambient-only",
      "status": "fail",
      "summary": "The page at /blog/smart-auto-toggle-youtube-subtitles/'s links are all ordinary page furniture; none point an agent anywhere.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/blog/",
      "reason": "ambient-only",
      "status": "fail",
      "summary": "The page at /blog/'s links are all ordinary page furniture; none point an agent anywhere.",
      "homepage": false
    },
    {
      "url": "https://subtitle.im/help/",
      "reason": "markdown-alternate",
      "status": "pass",
      "summary": "The page at /help/ points at a markdown version of itself through a Link header, alongside 1 other discovery relation.",
      "homepage": false
    }
  ],
  "reason": "ambient-only",
  "sources": [
    "header"
  ],
  "totalLinks": 24,
  "markdownAlternates": [
    {
      "href": "https://subtitle.im/index.md",
      "source": "header"
    }
  ],
  "meaningfulRelations": [
    "alternate",
    "describedby"
  ]
}

Related checks

See sites that pass Typed links →Guide: How to serve Markdown to AI agents with content negotiation →
Methodology →

Penalties · subtitle.im

No bot challenge

Serves our crawler without a challenge

PassesPenalty: 0 of 15 points

What we found

Our crawler reaches the page without being challenged.

Response receivedHTTP 200

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "status": 200
}

Related checks

Methodology →

Penalties · subtitle.im

No noindex

The homepage does not block indexing or snippets

PassesPenalty: 0 of 20 points

What we found

Nothing on the homepage tells a crawler to skip it or to withhold its snippet.

Indexing restrictions

None recorded

Snippet restrictions

None recorded

Training opt-outs

None recorded

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "blocking": [],
  "finalUrl": "https://subtitle.im/",
  "redirects": 0,
  "directives": [
    {
      "name": "index",
      "value": null,
      "inHead": true,
      "source": "html",
      "userAgent": "*"
    },
    {
      "name": "follow",
      "value": null,
      "inHead": true,
      "source": "html",
      "userAgent": "*"
    }
  ],
  "ignoredScopes": [],
  "trainingOptOut": [],
  "snippetBlocking": []
}

Related checks

Methodology →

Penalties · subtitle.im

No JavaScript wall

Serves its content without JavaScript

PassesPenalty: 0 of 25 points

What we found

The captured homepage HTML contains 1171 content words; completeness is not assessed.

Words in raw HTML
1,171
Script elements
16
Markup characters
340,060

Measured from the response HTML, before JavaScript runs.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "reason": "text-observed",
  "bodyWords": 1222,
  "truncated": false,
  "scriptCount": 16,
  "contentWords": 1171,
  "markupLength": 340060,
  "passWordThreshold": 120,
  "hasNoscriptFallback": false,
  "nontextElementCount": 401
}

Related checks

Guide: How to serve content AI crawlers can read without JavaScript →
Methodology →

Penalties · subtitle.im

AI search bots let in

Allows search and user-fetch crawlers

PassesPenalty: 0 of 25 points

What we found

robots.txt allows every known search and user-fetch crawler to reach the homepage.

Blocked crawlers
0
Path checked
/

Blocked crawlers

None recorded

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "path": "/",
  "capped": false,
  "blocked": [],
  "blockedCount": 0,
  "penaltyPoints": 0
}

Related checks

Check again: robots.txt checker →Guide: How to write robots.txt rules for AI crawlers →
Methodology →

Penalties · subtitle.im

HTTPS and HTTP 200

Serves the homepage over HTTPS with HTTP 200

PassesPenalty: 0 of 10 points

What we found

The homepage is served over HTTPS and returns HTTP 200.

Response receivedHTTP 200

https://subtitle.im

Final URL: https://subtitle.im/

Final connection
HTTPS
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "error": null,
  "secure": true,
  "status": 200,
  "finalUrl": "https://subtitle.im/",
  "requestedUrl": "https://subtitle.im"
}

Related checks

Methodology →

Penalties · subtitle.im

Title and description

Provides a title and meta description

PassesPenalty: 0 of 3 points

What we found

The homepage provides both a non-empty title and meta description.

Title elements
1
Meta descriptions
1

Page metadata

YouTube Caption Control & Duplicate Caption Extension | subtitle.im

Keep YouTube captions on or off across videos. Detect burned-in subtitles locally and handle duplicate captions your way with subtitle.im for Chrome.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "title": "YouTube Caption Control & Duplicate Caption Extension | subtitle.im",
  "titleCount": 1,
  "description": "Keep YouTube captions on or off across videos. Detect burned-in subtitles locally and handle duplicate captions your way with subtitle.im for Chrome.",
  "descriptionCount": 1
}

Related checks

Methodology →

Penalties · subtitle.im

Two redirects at most

Reaches the homepage within two redirects

PassesPenalty: 0 of 3 points

What we found

The homepage is reached in 0 redirects.

Redirects
0

Response received

https://subtitle.im

Final URL: https://subtitle.im/

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "finalUrl": "https://subtitle.im/",
  "redirects": 0,
  "threshold": 2,
  "requestedUrl": "https://subtitle.im"
}

Related checks

Methodology →

Penalties · subtitle.im

Answers within 3 s

Returns the homepage within three seconds

PassesPenalty: 0 of 3 points

What we found

The homepage reached a plain crawler in 111 ms.

Response time
111 ms
Direct attempts
1
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "durationMs": 111,
  "thresholdMs": 3000,
  "directAttempts": 1
}

Related checks

Methodology →

Agent capabilities · subtitle.im

API catalog

Publishes an API catalog

Not applicableAdds +1 to the badge when found

What we found

No API catalog published.

Response receivedHTTP 404

Discovery result
absent

Advertised via

None recorded

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "wellKnown": {
    "status": 404,
    "problem": "absent",
    "profile": null,
    "contentType": null
  },
  "advertisedVia": []
}

Related checks

See sites that pass API catalog →
Methodology →

Agent capabilities · subtitle.im

auth.md

Publishes an auth.md for agents

Not applicableAdds +1 to the badge when found

What we found

No /auth.md published.

Response receivedHTTP 404

Content-Type: text/markdown

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "error": null,
  "reason": "absent",
  "status": 404,
  "contentType": "text/markdown"
}

Related checks

See sites that pass auth.md →
Methodology →

Agent capabilities · subtitle.im

MCP server card

Lists an MCP server card in its AI Catalog

Not applicableAdds +1 to the badge when found

What we found

No AI Catalog published, so no MCP server card can be discovered.

Catalog entries
0

Response receivedHTTP 404

Discovery result
absent
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "reason": "absent",
  "catalog": {
    "status": 404,
    "entries": 0,
    "problem": "absent",
    "contentType": null,
    "specVersion": null,
    "malformedEntries": 0
  }
}

Related checks

See sites that pass MCP server card →
Methodology →

Agent capabilities · subtitle.im

A2A agent card

Publishes an A2A Agent Card

Not applicableAdds +1 to the badge when found

What we found

No A2A Agent Card at /.well-known/agent-card.json, and none listed in an AI Catalog.

Catalog entries
0

Response receivedHTTP 404

Content-Type: text/html

Discovery result
absent
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "cards": [
    {
      "via": "well-known",
      "name": null,
      "error": null,
      "notes": [],
      "shape": null,
      "skills": 0,
      "source": "https://subtitle.im/.well-known/agent-card.json",
      "status": 404,
      "usable": false,
      "problem": "absent",
      "version": null,
      "bindings": [],
      "identifier": null,
      "interfaces": []
    }
  ],
  "reason": "absent",
  "catalog": {
    "status": 404,
    "entries": 0,
    "problem": "absent"
  },
  "wellKnown": {
    "status": 404,
    "problem": "absent",
    "contentType": "text/html"
  }
}

Related checks

See sites that pass A2A agent card →
Methodology →

Agent capabilities · subtitle.im

Agent Skills index

Publishes an Agent Skills index

Not applicableAdds +1 to the badge when found

What we found

No usable Agent Skills index was found at either well-known path or in the AI Catalog.

Artifact verification
not-performed
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "reason": "absent",
  "catalog": {
    "status": 404,
    "problem": "absent",
    "individualSkills": 0
  },
  "indexes": [
    {
      "via": "well-known",
      "error": null,
      "notes": [],
      "total": 0,
      "format": null,
      "issues": [],
      "schema": null,
      "source": "https://subtitle.im/.well-known/agent-skills/index.json",
      "status": 404,
      "usable": 0,
      "entries": [],
      "problem": "absent",
      "rejected": 0,
      "identifier": null
    },
    {
      "via": "well-known",
      "error": null,
      "notes": [],
      "total": 0,
      "format": null,
      "issues": [],
      "schema": null,
      "source": "https://subtitle.im/.well-known/skills/index.json",
      "status": 404,
      "usable": 0,
      "entries": [],
      "problem": "absent",
      "rejected": 0,
      "identifier": null
    }
  ],
  "artifactVerification": "not-performed"
}

Related checks

See sites that pass Agent Skills index →
Methodology →

Agent capabilities · subtitle.im

WebMCP

Declares WebMCP tools for browser agents

Not applicableAdds +1 to the badge when found

What we found

No WebMCP declarations were found in the collected HTML or inline scripts. External scripts were not inspected.

Pages checked
4
Declarations
0
Usable declarations
0
Detection method
static
Runtime verification
not-performed
Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "pages": [
    {
      "key": "homepage",
      "url": "https://subtitle.im/",
      "secure": true,
      "usable": 0,
      "truncated": false,
      "references": 0,
      "parseErrors": 0,
      "declarations": 0
    },
    {
      "key": "page:https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "url": "https://subtitle.im/blog/smart-auto-toggle-youtube-subtitles/",
      "secure": true,
      "usable": 0,
      "truncated": false,
      "references": 0,
      "parseErrors": 0,
      "declarations": 0
    },
    {
      "key": "page:https://subtitle.im/blog/",
      "url": "https://subtitle.im/blog/",
      "secure": true,
      "usable": 0,
      "truncated": false,
      "references": 0,
      "parseErrors": 0,
      "declarations": 0
    },
    {
      "key": "page:https://subtitle.im/help/",
      "url": "https://subtitle.im/help/",
      "secure": true,
      "usable": 0,
      "truncated": false,
      "references": 0,
      "parseErrors": 0,
      "declarations": 0
    }
  ],
  "reason": "absent",
  "detection": "static",
  "pageCount": 4,
  "references": [],
  "parseErrors": 0,
  "usableCount": 0,
  "declarations": [],
  "referenceCount": 0,
  "declarationCount": 0,
  "runtimeVerification": "not-performed"
}

Related checks

See sites that pass WebMCP →
Methodology →

Agent capabilities · subtitle.im

Web Bot Auth

Publishes a Web Bot Auth key directory

Not applicableAdds +1 to the badge when found

What we found

No Web Bot Auth key directory at /.well-known/http-message-signatures-directory.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "keys": {
    "total": 0,
    "sample": [],
    "usable": 0,
    "testKeys": 0,
    "evaluated": 0,
    "privateMaterial": 0
  },
  "notes": [
    "media-type",
    "unsigned"
  ],
  "shape": null,
  "reason": "absent",
  "signature": {
    "total": 0,
    "status": "absent",
    "ignored": 0,
    "coverage": null,
    "malformed": false,
    "signatures": []
  },
  "wellKnown": {
    "status": 404,
    "problem": "absent",
    "finalUrl": "https://subtitle.im/.well-known/http-message-signatures-directory",
    "redirects": 0,
    "contentType": null
  },
  "extraMembers": [],
  "signatureAgent": "https://subtitle.im"
}

Related checks

See sites that pass Web Bot Auth →
Methodology →

Agent capabilities · subtitle.im

x402 / MPP payments

Accepts agent payments with x402 or MPP

Not applicableAdds +1 to the badge when found

What we found

No HTTP 402 payment challenge on the homepage or robots.txt, and no manifest at /.well-known/x402.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "reason": "absent",
  "manifest": {
    "kind": null,
    "notes": [],
    "shape": null,
    "status": 404,
    "problem": "absent",
    "finalUrl": "https://subtitle.im/.well-known/x402",
    "resources": {
      "total": 0,
      "sample": [],
      "skipped": {},
      "eligible": 0,
      "examined": 0
    },
    "contentType": null
  },
  "protocols": [],
  "responses": [],
  "verification": null,
  "paymentVerification": "not-performed"
}

Related checks

See sites that pass x402 / MPP payments →
Methodology →

Agent capabilities · subtitle.im

ACP commerce

Publishes ACP discovery metadata

Not applicableAdds +1 to the badge when found

What we found

No ACP discovery declaration established at /.well-known/acp.json.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "api": false,
  "key": "well-known-acp",
  "issues": [],
  "marked": false,
  "reason": "absent",
  "status": 404,
  "usable": false,
  "problem": "absent",
  "version": null,
  "commerce": false,
  "services": [],
  "transports": [],
  "capabilities": [],
  "transactionVerification": "not-performed"
}

Related checks

See sites that pass ACP commerce →
Methodology →

Agent capabilities · subtitle.im

UCP commerce

Publishes UCP discovery metadata

Not applicableAdds +1 to the badge when found

What we found

No UCP discovery declaration established at /.well-known/ucp.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "api": false,
  "key": "well-known-ucp",
  "issues": [],
  "marked": false,
  "reason": "absent",
  "status": 404,
  "usable": false,
  "problem": "absent",
  "version": null,
  "commerce": false,
  "services": [],
  "transports": [],
  "capabilities": [],
  "transactionVerification": "not-performed"
}

Related checks

See sites that pass UCP commerce →
Methodology →

Agent capabilities · subtitle.im

AMP discovery

Publishes AMP discovery metadata

Not applicableAdds +1 to the badge when found

What we found

No public AMP discovery declaration established. Private or hidden agents may not advertise one to our crawler.

Response receivedHTTP 404

https://subtitle.im/.well-known/agent.json

Content-Type: text/html

Discovery source
native
Declaration location
https://subtitle.im/.well-known/agent.json

Declared agent addresses

No usable addresses recorded

Declaration issues

No issues recorded

Discovery documents

  • https://subtitle.im/.well-known/agent.json · absent

Discovery only. Messaging, health, identity ownership and extension activation were not tested. This does not establish Level 0 conformance.

Technical scan data JSON

Archived measurements. Long values and lists are shortened for display.

{
  "reason": "absent",
  "selected": {
    "via": "native",
    "issues": [],
    "marked": false,
    "source": "https://subtitle.im/.well-known/agent.json",
    "status": 404,
    "usable": false,
    "problem": "absent",
    "version": null,
    "endpoint": null,
    "finalUrl": "https://subtitle.im/.well-known/agent.json",
    "contentType": "text/html",
    "identifiers": [],
    "requestedUrl": "https://subtitle.im/.well-known/agent.json",
    "lifecycleStatus": null
  },
  "declarations": [
    {
      "via": "native",
      "issues": [],
      "marked": false,
      "source": "https://subtitle.im/.well-known/agent.json",
      "status": 404,
      "usable": false,
      "problem": "absent",
      "version": null,
      "endpoint": null,
      "finalUrl": "https://subtitle.im/.well-known/agent.json",
      "contentType": "text/html",
      "identifiers": [],
      "requestedUrl": "https://subtitle.im/.well-known/agent.json",
      "lifecycleStatus": null
    }
  ],
  "runtimeVerification": "not-performed"
}

Related checks

See sites that pass AMP discovery →Check again: Agent Mesh Protocol checker →Guide: How to publish Agent Mesh Protocol discovery →
Methodology →

Site profile

Login
Not established
API
Not established
Commerce
Not established

It decides which conditional checks apply. “Not established” means no proof in what we read, not proof of absence.

Access & usage policy

Who can read this page, and for what purpose?

GoodForBotsBot received HTTP 200 via a direct request. No indexing restriction was observed in the supported homepage directives.

Sampled URL: https://subtitle.im/

Declared crawling rules

No matching refusal for this URL was found for the listed identities.

Sources and scope: declared crawling rules

  • Declared allow · Scan admission

    • GoodForBotsBot/1.0 (+https://goodforbots.com/bot)

    The recorded robots admission decision allowed our crawler to proceed.

    GoodForBotsBot admission along the homepage request chain

    https://subtitle.im/

    robots.txt is present and valid

  • Declared allow · robots.txt

    • goodforbotsbot (Site diagnostics)
    • * (Default robots group)
    • oai-searchbot (ai-search)
    • claude-searchbot (ai-search)
    • perplexitybot (ai-search)
    • mistralai-index (ai-search)
    • kimi-searchbot (ai-search)
    • amzn-searchbot (ai-search)
    • meta-webindexer (ai-search)
    • exasearchbot (ai-search)
    • aiwebindex (ai-search)
    • duckassistbot (ai-search)
    • shapbot (ai-search)
    • yandexadditional (ai-search)
    • yandexadditionalbot (ai-search)
    • gptbot (ai-training)
    • claudebot (ai-training)
    • mistralai-training (ai-training)
    • kimibot (ai-training)
    • ai2bot (Unknown)
    • applebot-extended (ai-training)
    • webzio-extended (ai-training)
    • chatgpt-user (user-fetch)
    • claude-user (user-fetch)
    • perplexity-user (user-fetch)
    • mistralai-user (user-fetch)
    • kimi-user (user-fetch)
    • amzn-user (user-fetch)
    • diffbot-user (user-fetch)
    • firecrawlagent (extraction)
    • webzio (extraction)
    • meta-externalfetcher (user-fetch, agent)
    • google-extended (ai-training, grounding)
    • meta-externalagent (ai-training, product-improvement)
    • amazonbot (ai-training, product-improvement)
    • ccbot (open-dataset, ai-training)
    • googlebot (search)
    • bingbot (search)

    No matching refusal for this URL in the applicable robots group. This is a declaration, not an access test.

    Acquisition of https://subtitle.im/

    https://subtitle.im/robots.txt

    User-agent: *
allow: /

    robots.txt is present and validStates a position on AI crawlersAllows search and user-fetch crawlers

Observed access

GoodForBotsBot received HTTP 200 via a direct request.

Sources and scope: observed access
Coverage and interpretation
  • Crawler coverage includes the registered identities and up to 50 user-agent entries from robots.txt. Source excerpts and detail groups are bounded; omissions are labelled.
  • Observed access describes GoodForBotsBot only. Other crawler entries describe declared rules, not tests of those operators' access.
  • Coverage is the sampled homepage response and collected robots.txt files. No indexing or citation is guaranteed. Usage preferences are declarations, not a legal determination of permission.
  • This explanation adds no points or penalties. Any score effects belong to the linked checks.
  • AIPREF and Content Signals keep their own definitions. AIPREF search can include processing used exclusively for search; training preferences are not a blanket ruling on every search process.

In its category

16th of 39 in Developer Tools & APIs

Full ranking →Whole category →
  1. 1Good for Botsgoodforbots.com
  2. 2ProxyJamproxyjam.com
  3. 16subtitle.im · this reportsubtitle.im

The prompts in the owner view would take subtitle.im to 91, 4th in its category.

To the prompts →

Category average 63. The percentile appears once the catalogue holds a few hundred sites.

Scan details

Every scan is kept. Pro draws the history as a chart →

Scanned
26 Oct 2026
Rubric
0.9.0
Requests
23
Fetched
1.1 MB
Took
17.7 s
Homepage
111 ms · direct
Pages read
4
robots.txt
allowed
Which pages the scan read

The homepage and up to three pages from the sitemap and homepage links. Structured data, page structure, Markdown negotiation and typed links check each page read and take the median page; other checks read the homepage.

  • Homepagealways read
  • /blog/smart-auto-toggle-youtube-subtitles/article · from the sitemap · read
  • /blog/collection · linked from the homepage · from the sitemap · read
  • /help/linked from the homepage · from the sitemap · read

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