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Chrome Goldmine

chromegoldmine.com

Database of expired Chrome extensions with proven demand and rebuild plans

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Good for Bots report

Chrome Goldmine scores 95 of 100: 47 of the 50 base points, 49 of the 50 agent-layer points, no penalties.

Earned

47 of the 50 base points above the line, 49 of the 50 agent-layer points below it.

95

3 prompts away

Copy them below ↓

4

Taken back

Earned, then taken back by penalties.

1
Penalties0
How scoring works · current methodology →

Through a bot’s eyes

“Chrome Goldmine is a curated database of 9,656 expired Chrome extensions with proven demand, providing indie makers with revenue estimates, user metrics, and step-by-step rebuild plans.”

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

A language model reading the provided homepage markdown, markdown twin, llms.txt, and JSON-LD data learns about a commercial database of expired Chrome extensions aimed at solo developers and indie makers. The text covers specific metrics for sample entries, such as historical user counts, categories like productivity or shopping, estimated monthly revenues, and reasons for discontinuation like Manifest V3 updates or abandonment. Pricing details, including the single-tier launch price and regular price, are clearly stated alongside checkout links. The provided llms.txt file adds extensive navigational details, blog structure outlines, and comprehensive feature breakdowns, while the JSON-LD supplies organizational metadata, founder details, and social links.

What is Chrome Goldmine?

Chrome Goldmine is a research product and database designed for indie hackers, solo SaaS builders, and developers looking for profitable project ideas. It offers a curated list of 9,656 expired Chrome extensions that had established user bases before shutting down.

Read more →

The database provides historical user metrics, category classifications, rebuild difficulty ratings, reasons for failure, competitor analysis, revenue estimates, and step-by-step rebuild plans. The product is delivered as an interactive Notion workspace along with a CSV export, and includes quarterly updates. It is available for a one-time payment with a launch discount for early buyers.

3 prompts, 5 points

For Claude Code, Cursor or Codex. The score moves after the next scan.

+2.1score from 95 to 98

Give links and buttons accessible names

142 of 144 assessed homepage links and buttons have a nonempty accessible name.

Read prompt

+1.3score from 98 to 99

Expose control roles, states and relationships

165 of 166 assessed homepage controls and role declarations meet the static role, state and relationship checks.

Read prompt

Pro

10 more prompts in Pro

Pro shows a prompt for every fix and drafts your llms.txt and robots.txt. It never changes the score.

$9 once, per listingSee Pro

Deployed your fixes? Rescan to update your score →

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

Readable base

46.7 / 50

Passes.

3.3 of 3.3 points.

robots.txt is valid, with 12 user-agent groups.

Passes.

8.3 of 8.3 points.

Sitemap declared in robots.txt, listing 75 URLs.

Passes.

8.3 of 8.3 points.

All 4 pages read pass. The homepage describes itself to machines as Organization, ImageObject, Person in valid schema.org JSON-LD.

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.

8 of 8 assessed homepage navigation links expose usable destinations.

Half passes.

2.1 of 4.2 points.

142 of 144 assessed homepage links and buttons have a nonempty accessible name.

Passes.

2.5 of 2.5 points.

4 of 4 assessed homepage form fields meet the static naming and field-semantics checks.

Half passes.

1.3 of 2.5 points.

165 of 166 assessed homepage controls and role declarations meet the static role, state and relationship checks.

Passes.

1.7 of 1.7 points.

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

Agent layer

48.8 / 50

Passes.

11.3 of 11.3 points.

/llms.txt is well formed: 59 links across 7 sections.

Passes.

7.5 of 7.5 points.

/llms.txt is descriptive: a summary plus descriptions on 100% of links. Every description follows the link with something other than ":", the separator the format specifies (`- [name](url): notes`).

Passes.

12.5 of 12.5 points.

/llms-full.txt serves the site's content as markdown (at least 64 KB).

Passes.

10 of 10 points.

All 4 pages read pass. The homepage serves markdown on `Accept: text/markdown`.

Passes.

5 of 5 points.

States a position on 9 AI crawlers, across 3 purposes (training, search, user-fetch).

Passes.

2.5 of 2.5 points.

Declares AI usage preferences via Content-Signal (robots.txt): ai-train, ai-input, search.

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 2296 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 737 ms.

Agent capabilities

0 of 10 · 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.

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://chromegoldmine.com/

Declared crawling rules

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

Sources and scope: declared crawling rules

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

2nd of 24 in Developer Tools & APIs

Whole category →
  1. 1Good for Botsgoodforbots.com
  2. 2Chrome Goldmine · this reportchromegoldmine.com
  3. 3Modeinspectmodeinspect.com

The prompts above would take Chrome Goldmine to 100, first in its category.

To the prompts ↑

Category average 56. The percentile appears once the catalogue holds a few hundred sites.

Scanned

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.

Scan details

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

Scanned
3 Oct 2026
Rubric
0.9.0
Requests
22
Fetched
1.4 MB
Took
30.2 s
Homepage
737 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/expired-chrome-extensions/best-by-category/article · linked from the homepage · from the sitemap · read
  • /blogcollection · linked from the homepage · from the sitemap · read
  • /partnersfrom the sitemap · read

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