Authentication
Every request to the Acme API needs an API key.
Send your key in the Authorization header. Rotate it when a teammate leaves.
Use '/' for commands
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Instant answers right in the search bar to help developers find what they need - fast.
Put quickstarts and how-to guides in the same sidebar as your API reference.
Test every endpoint right from the docs and copy ready-to-use code in 9 languages.
Fibi answers developer questions across your support channels, alongside the rest of your support.
āThe built-in AI answers and support for multiple languages in a single docs site is very helpful. The interface feels intuitive and is easy-to-use.ā
Mustafa KurtHead of Product, Booking ExpertsEvery guide and endpoint is listed in your llms.txt, so AI tools find their way.
Write and update your API docs from Claude, ChatGPT, or Cursor through our MCP.
Copy any page as Markdown, or open it in ChatGPT or Claude in one click.
Built to be found and cited by ChatGPT, Claude and other LLMs, with nothing to set up.
Run your API docs, versions and settings from one clean dashboard.
Add endpoints, parameters and request examples to any guide.
AI finds missing and outdated answers and updates your guides automatically.
Link your spec or push it from CI. Review the changes, then publish.
āFeaturebase is an impressive way to document software and keep customers engaged. An amazing product from an awesome team.ā
Michelle RatcliffeUX Docs Writer, The Despatch CompanyServe your API docs from your own domain, with your logo, colors, fonts and dark mode.
Release new API versions and keep the old ones live. Developers switch in one click.
Restrict docs to your team or specific customers.
Every change is saved. Compare drafts and roll back.
Choose who can edit the docs, manage the API or publish.
Your team signs in through your own identity provider.
āMy entire support documentation and FAQ for Photo AI is now all on @FeaturebaseHQ. (Iām unaffiliated to Featurebase, I just like the product).ā
Pieter LevelsFounderāFeaturebase has the perfect mix of features. Branding, custom domain, and integrations took minutes. Exactly what I was looking for.ā
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API docs are part of one Featurebase subscription, with your help center, support inbox, and more. 10-day free trial, no credit card required.
API documentation explains how to use your API: every endpoint with its parameters, responses and code examples, plus guides such as authentication and quickstarts. Good API docs let developers, and now AI agents, build with your API without writing to you.
Yes. Import an OpenAPI 3.0 or 3.1 spec as a JSON or YAML file, from a public URL, or with a push from your CI. Every endpoint gets its own page, grouped by tag. Convert Swagger 2.0 files to OpenAPI 3 first.
Link a URL that we check every 6 hours, or push the spec from your CI after each deploy, for example with GitHub Actions. Changes wait as a draft that lists what changed and marks breaking changes, until you publish them. You can also roll back to one of the last revisions.
Yes. Try it sends real requests to the servers you allow, with the readerās own key. You can also show code samples only, or turn Try it off. The Free plan includes 500 Try it requests a day.
Nine: cURL, JavaScript, TypeScript, Python, PHP, Go, Java, Ruby and C#. Your own samples from the spec come first, and every endpoint shows example responses for each status code.
Yes. Publish API versions side by side. Readers switch with one menu, and a deprecated version shows a banner that points to the latest one. The Free plan includes 2 live versions.
Yes. Add each API to the same help center. Each one gets its own tab and its own versions.
Yes. Your API reference is a tab of your help center, with your guides in its sidebar. One search finds both, and Ask AI and Fibi answer from both.
Yes. Every page has a Markdown version and opens in ChatGPT or Claude from its menu, and your guides and endpoints are listed in your llms.txt. Ask AI and Fibi answer from your API reference on the Growth plan and up.
Yes. Connect Claude or Cursor to our MCP server, then write and update your API docs and guides from there.
Yes. Your API reference uses your help centerās domain, colors, fonts and dark mode. A custom domain is on the Growth plan and up.
Yes. Make your help center private with sign-in, and your API reference is private too. Private help centers are on the Professional plan and up.
Export your OpenAPI spec from ReadMe, Mintlify, Swagger or any other tool and import it. Bring your guides from Intercom, Zendesk or Crisp with one-click migration.
Yes. API docs are on every plan, Free included, with Try it. See pricing.
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