API Documentation Generator: Professional Docs in Minutes
Good API documentation is the difference between a developer-friendly API and a frustrating one. This tool generates comprehensive, professional documentation for any API endpoint.
Generate production-quality API endpoint documentation that is complete enough for a developer to integrate without reading source code. DOCUMENTATION STANDARDS: 1. Endpoint Overview - Write a concise description of what the endpoint does and when to use it - State the authentication requirement (Bearer token, API key, none, etc.) - Note the rate limit if relevant - Specify the API version or base URL context if applicable 2. Request Specification - Document every parameter: path params, query params, headers, and request body fields - For each parameter: name, type, required/optional, constraints (min/max, regex, enum values), and a human-readable description - Mark default values explicitly - Provide a complete, realistic example request (cURL and/or language-specific) with all headers 3. Response Specification - Document the success response with full schema: field names, types, descriptions, and nesting - Include a realistic example response body with plausible data (not "string" or "123") - Document pagination structure if the endpoint returns a list 4. Error Documentation - List every possible error status code this endpoint can return - For each: HTTP status, error code/slug, human-readable message, and when/why it occurs - Include an example error response body - Document validation error format for 400 responses 5. Usage Notes - Call out any non-obvious behavior, side effects, or idempotency guarantees - Document related endpoints that are commonly used together - Note any fields that may be deprecated or will change OUTPUT CONSTRAINTS: - Use consistent, scannable formatting throughout - Every field in request and response schemas must be documented (no "and other fields") - Example values must be realistic and internally consistent (e.g., IDs in request should match response) - If information is missing from MY INFO, make reasonable assumptions and mark them clearly with [ASSUMED] FORMAT: # [METHOD] [PATH] [Description] ## Authentication [Auth details] ## Request ### Path Parameters | Parameter | Type | Required | Description | ### Query Parameters | Parameter | Type | Default | Description | ### Request Body ```json [schema with comments] ``` ## Response ### Success (200/201) ```json [example response] ``` ### Field Descriptions | Field | Type | Description | ## Errors | Status | Code | Description | When | ## Example ```bash curl ... ``` ## Notes [Behavioral notes, side effects, related endpoints] --- MY INFO: Method (GET/POST/PUT/DELETE): (required) Path (/api/...): (required) Request Body Schema: (required for POST/PUT, optional for GET/DELETE) Response Schema: (required) Authentication Type: (optional) Endpoint Description: (optional) Error Scenarios to Document: (optional)
Documentation Components
Endpoint Description: Clear explanation of what the endpoint does Parameters: Path, query, and header parameters with types Request Body: Schema with examples Response Body: Success and error response formats Error Codes: HTTP status codes with explanations
Output Formats
- Markdown (for GitHub, GitBook)
- OpenAPI/Swagger specification
- HTML documentation
- Postman collection compatible
Best Practices
- Be specific: Document exact data types and constraints
- Include examples: Real-world request/response samples
- Document errors: All possible error responses
- Version your docs: Keep docs in sync with API versions
Create documentation your developers will actually want to read.