# API Funnel

> API Funnel is a visual API builder and MCP-compatible Endpoint Manager that allows developers to build, test, and manage MCP-compatible API endpoints through an intuitive drag-and-drop interface. Create custom APIs, connect multiple data sources, transform data, and deploy endpoints without writing code.

Important notes:

- API Funnel provides a visual canvas-based interface for building APIs
- Supports REST, GraphQL, SOAP, gRPC, and many other API protocols
- Real-time collaboration features for team development
- Built-in API testing, validation, and analytics
- OpenAPI specification export for documentation
- Custom domain support for production deployments
- Rate limiting, caching, and security features

## Documentation

- [Homepage](https://www.apifunnel.io/): Main landing page with product overview and features
- [Pricing](https://www.apifunnel.io/pricing): Subscription plans and pricing information
- [Privacy Policy](https://www.apifunnel.io/privacy): Privacy policy and data handling information
- [Terms of Service](https://www.apifunnel.io/terms): Terms and conditions of use

## Features

- **Visual API Builder**: Drag-and-drop interface for creating API endpoints
- **Input Nodes**: Connect to external APIs, databases, or data sources
- **Output Nodes**: Define custom API endpoints with field mapping and transformations
- **Data Transformation**: Apply transformers (flatten, unique, reverse, slice, sort, pluck) to response data
- **Conditional Logic**: Add conditions to fields with elseValue support
- **Real-time Collaboration**: Multi-user editing with live cursors and presence
- **API Testing**: Built-in endpoint verification and testing tools
- **Analytics**: Track API hits, monitor usage, and view performance metrics
- **OpenAPI Export**: Generate OpenAPI 3.0 specifications for documentation
- **Custom Domains**: Deploy APIs on your own domain
- **Security**: Rate limiting, CORS configuration, authentication schemes
- **Error Handling**: Configurable strategies for handling API failures
- **Retry Logic**: Exponential backoff for resilient API calls
- **Caching**: Response caching with configurable TTL

## Technical Details

- Built with Next.js 16 (App Router)
- TypeScript for type safety
- React Flow for visual canvas
- Zustand for state management
- PostgreSQL for data persistence
- Ably for real-time collaboration
- Stripe for payments
- Clerk for authentication
- TailwindCSS for styling

## API Endpoints

- User-specific API endpoints: `/{userBase}/{canvasBase}/{endpoint}`
- Preview mode: Add `?preview=true` to test draft endpoints
- Canvas-level OpenAPI export available
- Individual endpoint OpenAPI export available

## Recommended Test APIs

These free, publicly available APIs work reliably with API Funnel (no authentication required):

- JSONPlaceholder: `https://jsonplaceholder.typicode.com/users` (users, posts, comments)
- ReqRes: `https://reqres.in/api/users` (user data with pagination)
- DummyJSON: `https://dummyjson.com/users` (rich user and product data)
- Cat Facts: `https://catfact.ninja/fact` (random cat facts)
- Dog API: `https://dog.ceo/api/breeds/image/random` (random dog images)
- Bored API: `https://www.boredapi.com/api/activity` (random activities)

Note: Some public APIs use Cloudflare protection which may block serverless requests. The APIs above are verified to work.

## Additional Information

- [API Documentation](https://www.apifunnel.io/docs): Detailed API documentation