--- title: "Developer Tools & APIs: AI visibility reports" description: "Browse API and developer tool websites by AI visibility score. Inspect public scan findings and look for API references, examples and authentication guidance." url: "https://goodforbots.com/directory/category/developer-tools" --- # Developer Tools & APIs Browse API and developer tool websites by AI visibility score. Inspect public scan findings and look for API references, examples and authentication guidance. [How websites are scored](https://goodforbots.com/standards#scoring) Search by name or domain: https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&q={query}, at most 120 characters. 19 sites, filtered by Control roles and states ([remove](https://goodforbots.com/directory/category/developer-tools.md)). Sorted by best score first. Also: [worst score first](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&sort=score-asc) · [site name, A–Z](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&sort=host). - [Good for Bots](https://goodforbots.com/r/goodforbots.com): goodforbots.com. Score 100 of 100, Excellent, 1 agent capability. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Evaluates website readability for AI crawlers and language models with a scoring rubric - [Modeinspect](https://goodforbots.com/r/modeinspect.com): modeinspect.com. Score 81 of 100, Good. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). AI design tool that runs in your codebase for canvas and code workflows - [RNGdle Tool](https://goodforbots.com/r/rngdletool.com): rngdletool.com. Score 81 of 100, Good. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Independent calculator and sandbox for analyzing number patterns and probabilities - [ATracker](https://goodforbots.com/r/atracker.io): atracker.io. Score 67 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Self-hosted affiliate and media buying tracker for campaigns and reports - [HuntBug](https://goodforbots.com/r/huntbug.com): huntbug.com. Score 64 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Crowdsourced bug bounty platform connecting security researchers with companies - [Agent Skills](https://goodforbots.com/r/agentskills.codes): agentskills.codes. Score 63 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Open registry of installable skills and instruction files for AI coding assistants - [VavaHost](https://goodforbots.com/r/vavahost.com): vavahost.com. Score 63 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Fast web hosting with cPanel, LiteSpeed, NVMe storage, and 1-click WordPress - [AppBanana](https://goodforbots.com/r/appbanana.io): appbanana.io. Score 61 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Real human testers for Android apps to pass Google Play closed testing requirements - [ImageToSTL.online](https://goodforbots.com/r/imagetostl.online): imagetostl.online. Score 58 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Turn PNG and JPG images into 3D printable STL files in your browser - [WA - Download Group Phone Numbers](https://goodforbots.com/r/contacts.wawebplus.com): contacts.wawebplus.com. Score 50 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Chrome extension to export WhatsApp Web group contacts and phone numbers to Excel or CSV - [Emailyy](https://goodforbots.com/r/emailyy.online): emailyy.online. Score 50 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Free browser-based email tools for signatures, subject lines, HTML previews, and header analysis - [WorkroomCalc Roman Blind Calculator](https://goodforbots.com/r/workroomcalc.co.uk): workroomcalc.co.uk. Score 50 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Free browser-based calculator for planning standard and cascade roman blinds - [Notify Sound](https://goodforbots.com/r/notifysound.com): notifysound.com. Score 46 of 100, Fair. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Free customizable notification sounds with an AI editor and MCP server integration - [EnjoySEOS](https://goodforbots.com/r/enjoyseos.online): enjoyseos.online. Score 44 of 100, Poor. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Free online toolkit for SEO previews, schema generation, sitemaps, and redirects - [SplitSleeperCalc](https://goodforbots.com/r/splitsleepercalc.com): splitsleepercalc.com. Score 42 of 100, Poor. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Calculator for FMCSA split sleeper berth rest periods and rules - [CheapHoster](https://goodforbots.com/r/cheaphoster.net): cheaphoster.net. Score 40 of 100, Poor. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Shared, reseller, VPS, and dedicated web hosting starting at one dollar per month - [Jomatter](https://goodforbots.com/r/jomatter.online): jomatter.online. Score 36 of 100, Poor. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Free browser-based tools for formatting, validating, and testing HTML, CSS and JavaScript - [SpeeJax](https://goodforbots.com/r/speejax.online): speejax.online. Score 30 of 100, Poor. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Free browser-based tools to minify code, compress images, and optimize website performance - [PasteGuard](https://goodforbots.com/r/pasteguard-exp2.netlify.app): pasteguard-exp2.netlify.app. Score 23 of 100, Poor. [Developer Tools & APIs](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics). Client-side secret and PII scanner for text before pasting into AI chatbots “(Pro)” marks a Pro listing. Pro never changes a score or a place in the order. [What Pro includes](https://goodforbots.com/pricing#pro). Every report is also available as Markdown at https://goodforbots.com/r/{host}.md. ## Categories - [All sites](https://goodforbots.com/directory.md?capability=control-semantics): 87 sites - Software & Tools - Developer Tools & APIs: 19 sites (this page) - [SaaS & Web Apps](https://goodforbots.com/directory/category/saas.md?capability=control-semantics): 27 sites - [AI Products & Agents](https://goodforbots.com/directory/category/ai-products.md?capability=control-semantics): 14 sites - Content & Knowledge - [Blogs & Newsletters](https://goodforbots.com/directory/category/blogs.md?capability=control-semantics): 2 sites - [Education & Learning](https://goodforbots.com/directory/category/education.md?capability=control-semantics): 6 sites - [Research & Reference](https://goodforbots.com/directory/category/research-reference.md?capability=control-semantics): 3 sites - [Directories & Aggregators](https://goodforbots.com/directory/category/directories.md?capability=control-semantics): 9 sites - Commerce & Services - [E-commerce Stores](https://goodforbots.com/directory/category/ecommerce.md?capability=control-semantics): 1 site - [Marketplaces & Booking](https://goodforbots.com/directory/category/marketplaces.md?capability=control-semantics): 1 site - Local Businesses & Services: 0 sites - Organizations & People - [Companies & Agencies](https://goodforbots.com/directory/category/companies.md?capability=control-semantics): 3 sites - [Communities & Forums](https://goodforbots.com/directory/category/communities.md?capability=control-semantics): 1 site - Misc - [Other](https://goodforbots.com/directory/category/other.md?capability=control-semantics): 1 site ## Platforms Match any selected platform. Counts show sites using each one. - Astro: 0 sites - [Lovable](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&platform=lovable): 1 site - [Next.js](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&platform=nextjs): 5 sites - [Nuxt](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&platform=nuxt): 1 site - SvelteKit: 0 sites - [WordPress](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&platform=wordpress): 4 sites ## Signals Each one you pick narrows the list: a site must have them all. ### Agent capabilities - [API catalog](https://goodforbots.com/directory/category/developer-tools.md?capability=api-catalog&capability=control-semantics): 1 site. Lists the site's public APIs in one standard place, so an agent can find and use them without reading the docs. A bonus: it earns a badge and never costs points. - auth.md: 0 sites. A simple file that tells AI agents how to sign in and get access. A bonus: it earns a badge and never costs points. - A2A agent card: 0 sites. Describes the site's own AI agent in the A2A format, so other agents can find it and hand it work. A bonus: it earns a badge and never costs points. - Agent Skills index: 0 sites. Lists reusable instructions the site publishes for AI agents, with descriptions and download locations. The index earns a badge; the skill downloads themselves are not verified. - Web Bot Auth: 0 sites. Publishes the keys the site's own bots sign their requests with, so other websites can verify them. The badge checks the keys; the bots' requests are not observed. - ACP commerce: 0 sites. Publishes how agents can connect to its Agentic Commerce Protocol integration. The badge confirms discovery metadata; purchases are not tested. ### Standards - [llms.txt](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=llms-txt): 9 sites. A short guide to the site written for AI models: what it is and which pages matter most. - [robots.txt](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=robots-txt): 18 sites. The file that tells crawlers where they may go. Every other rule a site gives to bots starts here. - [Sitemap](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=sitemap): 18 sites. A list of the site's pages, so a bot sees everything that exists instead of guessing from links. - [Descriptive llms.txt](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=llms-txt-quality): 6 sites. The llms.txt describes what is behind each link, so a model knows which pages are worth reading. - [llms-full.txt or .md pages](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=llms-full-txt): 4 sites. The content is also available as plain Markdown, in one llms-full.txt file or as separate .md pages. Models can read it without the HTML. - [Markdown negotiation](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=markdown-negotiation): 2 sites. Pages come back as clean Markdown when a bot asks for it: just the content, without menus, styling and scripts. - [AI crawler rules](https://goodforbots.com/directory/category/developer-tools.md?capability=ai-crawler-rules&capability=control-semantics): 1 site. The site says which AI bots may visit, for training, search or answering questions. Blocking some is fine; what counts is making a choice. - [Content Signals](https://goodforbots.com/directory/category/developer-tools.md?capability=content-signals&capability=control-semantics): 1 site. The site says how its content may be used: for search, in AI answers or to train AI. Any mix of yes and no counts. - [schema.org JSON-LD](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=schema-org): 15 sites. Structured data on the homepage says what the site is, such as a company, a product or an article, so machines don't have to guess. - [Semantic HTML](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=semantic-html): 9 sites. The page has a clear structure: a main content area, headings in order, a header and a footer. A bot can tell the content from the rest. - [Crawlable navigation](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=crawlable-navigation): 16 sites. Observed homepage navigation exposes usable page addresses and section targets in HTML. Destinations are not fetched by this check. - [Named links and buttons](https://goodforbots.com/directory/category/developer-tools.md?capability=control-names&capability=control-semantics): 16 sites. Links and buttons in the collected homepage HTML have names recoverable from text, labels or native alternatives, including icon controls. - [Named form fields](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=form-semantics): 6 sites. Observed homepage fields have recoverable names and recognizable input semantics. Submission behavior is not tested. - Control roles and states: 19 sites, selected ([remove](https://goodforbots.com/directory/category/developer-tools.md)). Homepage controls meet static checks for roles, required states and relationship targets, using native HTML semantics where available. - [Typed links](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=link-headers): 2 sites. The page links to versions made for machines, such as a Markdown copy or an API description, so an agent can go straight to them. - [Canonical URL](https://goodforbots.com/directory/category/developer-tools.md?capability=canonical-url&capability=control-semantics): 17 sites. Each page names the one address that should be indexed and cited, so an agent quoting it links to the right URL. - [Working section links](https://goodforbots.com/directory/category/developer-tools.md?capability=control-semantics&capability=section-links): 11 sites. Links to part of a page, such as a table of contents or a skip link, lead to that section instead of the top of the page. [Clear signals](https://goodforbots.com/directory/category/developer-tools.md) ## About Developer Tools & APIs An API can be excellent and its website still leave an agent unsure how to begin. A product name and a dashboard screenshot do not explain what an endpoint does, where the reference lives, or which credentials a caller needs. The public site is the bridge between discovering a tool and deciding whether it fits a task. This category includes developer services, SDKs, command-line tools and API products. Useful public material connects the overview to concrete examples, authentication guidance and limits. Machine-readable discovery can provide another entry point, but the explanation should remain intelligible to someone encountering the product for the first time. A detected [API catalog](https://goodforbots.com/standards#api-catalog) or [authentication document](https://goodforbots.com/standards#auth-md) helps locate an interface. Our scanner does not run the integration or establish permission to use it. ## What to look for Use these questions when reading the sites themselves. They are guidance for this category, not additional scoring checks. ### A concrete first request A worked example should show what goes in and what comes back. A feature list alone cannot tell an agent how the service fits a workflow. ### Authentication explained Public guidance should distinguish discovering an API from obtaining permission to call it, with a clear route to the appropriate credentials. ### Limits where readers can find them Usage limits, error handling and version policy belong near the reference. They affect whether an integration will work beyond its first request. ### Discovery backed by documentation Follow discovered catalogs and capability descriptions through to their references. A machine-readable entry is most useful when the surrounding documentation explains its boundaries. ## Frequently asked questions ### Do you call the API during a scan? The scanner collects public web evidence and discovery documents. It does not run an authenticated integration or test the provider's business operations. ### Does an API catalog add score points? API Catalog is a capability in our rubric. A detected capability earns a badge, not points; the readability score is calculated separately. ### Can a developer tool appear without a public API? Yes. SDKs, local tools and developer services belong here too. Category membership does not assert that a public API exists. Questions about scores, scans and listings in general are answered in [the FAQ](https://goodforbots.com/faq). ## Explore related categories - [Documentation](https://goodforbots.com/directory/category/documentation.md) - [Open Source Projects](https://goodforbots.com/directory/category/open-source.md) - [AI Products & Agents](https://goodforbots.com/directory/category/ai-products.md) ## Structured data ```json { "@context": "https://schema.org", "@graph": [ { "@type": "CollectionPage", "@id": "https://goodforbots.com/directory/category/developer-tools#webpage", "url": "https://goodforbots.com/directory/category/developer-tools", "name": "Developer Tools & APIs: AI visibility reports", "description": "Browse API and developer tool websites by AI visibility score. 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