API documentation tools

API documentation tools, compared for API teams.

How to evaluate API docs tools by the launch outcome that matters — generated reference, SDK examples, search, redirects, llms.txt — and where Sourced fits when docs and SDKs need to ship together.

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  • InputOpenAPI spec
  • LanguagesTS + Python
  • DocsPreview + llms.txt
  • ReleaseLaunch checks

01Checks

What buyers should check

01

OpenAPI import/export quality.

02

Custom-domain readiness, sitemap, redirects, and canonical handling.

03

Generated examples and SDK snippets.

04

Search, llms.txt, and AI/agent readability.

05

Publishing or release integration with SDK repos.

02Details

Where Sourced fits

01

Sourced is not trying to replace every knowledge-base workflow.

02

It fits startups that want API docs and SDKs to move together in one product.

03

It gives small teams a professional developer experience without hiring a docs platform team.

·Example output

A generation run shows the docs preview artifact shape.

Docs preview6 files

A local fixture run produced index.html, versioned index, operation page, openapi-summary.json, versions.json, and llms.txt.

Versionsv1.0.0

The preview includes a version directory and versions.json so versioning can be tested before hosting.

Operations1 page

The fixture generated a per-operation page at /v1.0.0/operations/listmessages.html.

Searchllms.txt

Generated docs include an agent-readable llms.txt artifact alongside the preview.

Example Sourced output for this page
ExampleWhy it mattersCurrent result
Docs preview reportRecords title, version, base URL, operation count, schema count, routes, files, and warnings.Example preview v1.0.0, 1 operation, 0 schema warnings.
Versioned docs filesDocs previews are structured so teams can review routes before custom-domain launch.index.html, v1.0.0/index.html, v1.0.0/openapi-summary.json, v1.0.0/llms.txt, and operation pages.
SEO launch guardrailsPublic site generation also emits sitemap, robots, llms.txt, canonical tags, JSON-LD, and Open Graph metadata.Latest SEO audit checks every generated public page and sitemap URL with no errors or warnings.