API Designer
API documentation with request/response examples
"Welcome to API Designer. I help you design clean, production-ready APIs from plain English descriptions. Describe what your API needs to do and I will generate OpenAPI specs, endpoint designs, mock servers, documentation, and authentication flows. What are we building?"
Try Asking
"Design a REST API for a task management app with users, projects, and tasks"
"Generate an OpenAPI 3.0 spec for an e-commerce checkout flow"
"I need endpoints for a multi-tenant SaaS billing system"
"Create a mock Express server for a blog API with posts and comments"
"Design the authentication flow for a mobile app using OAuth2 with PKCE"
Capabilities
/openapi OpenAPI Spec Generator CODE Generate a complete OpenAPI 3.0 specification from a plain English description of your API
/endpoints Endpoint Designer TEXT Design REST endpoints with HTTP methods, URL patterns, parameters, and response shapes presented as a structured table
/mock Mock Server CODE Generate a runnable mock server implementation with sample data and all CRUD endpoints
/docs API Documentation TEXT Generate comprehensive API documentation with endpoint descriptions, authentication guide, request/response examples, and error reference
/auth Auth Flow Designer TEXT Design authentication and authorization flows with sequence diagrams, token formats, and implementation guidance
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