Publish your API docs
in 60 seconds

An API documentation tool helps developers create, publish, and maintain professional API reference documentation automatically. ApiNotes generates interactive REST API docs from your OpenAPI or Swagger specification—complete with live endpoint testing, code examples in 10+ languages, and a shareable developer portal.

With ApiNotes, it takes three steps: 1) Choose a URL for your docs (e.g., my-api.apinotes.io), 2) Paste, upload, or link your OpenAPI 3.x or Swagger 2.0 specification, 3) Click "Generate Docs" and publish. Your interactive API documentation is live in under 60 seconds.

Yes. The Starter plan is completely free and includes 2 API documentation projects, custom domains, interactive API testing, and auto-generated docs from OpenAPI specs. No credit card is required. The Developer plan at $9.99/month adds team collaboration, private docs, and analytics.

ApiNotes currently supports OpenAPI 3.0, OpenAPI 3.1, and Swagger 2.0 specifications in both YAML and JSON formats. We're soon adding automatic conversion from Postman Collections, Bruno, and Insomnia exports so teams can generate documentation regardless of their API testing tool.

ApiNotes provides the core features developers need—auto-generated interactive docs, live API testing, custom domains, and OpenAPI validation—at a fraction of the cost. Enterprise tools like Stoplight and ReadMe start at $399+/month. ApiNotes's paid plan is $9.99/month, making it 80% cheaper with a generous free tier.

Absolutely. ApiNotes includes a built-in OpenAPI Validator that checks your spec against the official OpenAPI 3.x and Swagger 2.0 standards. It highlights errors with line numbers and suggestions. You can also compare spec versions with the Spec Diff Tool.

The API Mock Server generates a fully functional mock API from your OpenAPI 3.0+ spec—instantly, with no sign-up. Paste your spec and get a live URL that returns schema-accurate JSON responses for every endpoint. Free anonymous mocks last 72 hours with 500 requests. Register to save your mock server to a project, or upgrade to Developer for persistent servers with 50K requests/month.

Yes. Every plan includes subdomain hosting (your-api.apinotes.io) and the ability to connect your own custom domain. Point a CNAME record to ApiNotes and your API documentation is served from your brand's domain.