API Documentation Generator

Fill in the details of one API endpoint and get clean Markdown documentation instantly. The preview updates live as you type — nothing is uploaded to a server.

Preview
## `GET /api/resource`

### Response

```json
{}
```

### Status Codes

| Code | Meaning |
| --- | --- |
| `200` | Success |
| `404` | Not found |

About this API Docs Generator

Documenting an endpoint is easy to postpone — until a teammate has to guess what a field means, or a support ticket comes in asking how to call something that was never written down. This API Docs Generator turns a short form into clean, structured Markdown you can drop straight into a README, wiki, or internal docs site.

Why documented endpoints matter

  • Faster onboarding for new team members and external integrators
  • Fewer repeat questions in support channels or pull request reviews
  • A clear starting point if you later formalize things with an OpenAPI/Swagger spec

What to include in endpoint docs

  • Method and path — the exact HTTP verb and URL pattern, including path parameters
  • Parameters — path and query parameters with a short description of each
  • Request/response examples — realistic JSON so consumers know the exact shape to expect
  • Status codes — what each response code means for this specific endpoint

Tips for writing clear API descriptions

Describe what the endpoint does from the caller's perspective ("Returns the current user's profile") rather than how it's implemented internally. Keep parameter descriptions short and specific — "The unique user ID" is more useful than just "ID".

FAQ: API Docs Generator

Is this API Docs Generator free?
Yes — the API Docs Generator on Dev Brains AI is completely free to use with no signup required.
Is my API data sent to a server?
No. The documentation is assembled entirely in your browser using JavaScript. Nothing you type is uploaded or stored on our servers.
Does this replace OpenAPI/Swagger?
No — it is a fast way to draft clean, human-readable Markdown docs for an endpoint. For machine-readable specs that power interactive API explorers, use a proper OpenAPI generator; this tool is for documentation humans read, like a README or wiki page.

More developer tools from Dev Brains AI

Writing the whole project README too? Try the README Generator. Converting a curl example into working code? Use the cURL to Code Converter.