API testing, documentation, and integration tools
API Request Tester/Builder tool
Convert cURL commands to code in 20+ programming languages including JavaScript, Python, PHP, Go, and more
cURL Command Generator tool
Generate Postman collection JSON files with folders, requests, headers, and authentication
Create and edit OpenAPI specifications visually with YAML and JSON export
Test and explore GraphQL APIs with query editor, variables, headers, and response viewer
Build GraphQL queries visually with fields, arguments, variables, and fragments
Convert REST API endpoints to GraphQL schema definitions with type inference and resolver generation
Parse protobuf definitions, build messages, and generate gRPC client code with grpcurl commands
Build SOAP envelopes, parse WSDL files, and generate SOAP request templates
Connect to WebSocket servers, send and receive messages, debug real-time connections
Connect to Server-Sent Events endpoints and display real-time event streams with statistics
Parse and analyze webhook payloads with JSON formatting, header inspection, and cURL generation
Generate mock API responses with fake data for testing and development
Create mock API responses with status codes, headers, delays, and dynamic fake data
Generate API documentation from OpenAPI/Swagger specs with Markdown, HTML, and code samples
Generate JavaScript Fetch API code with async/await, error handling, and TypeScript support
Generate Axios HTTP client code with instance configuration, interceptors, and TypeScript support
Decode, validate, and debug JSON Web Tokens with claim inspection and expiration checking
Test OAuth 2.0 flows including authorization code, PKCE, implicit, and client credentials with provider presets
Validate and inspect OpenID Connect tokens with claim verification and discovery document parsing
Analyze CORS headers, test preflight requests, and generate server configuration examples
Reference and educational tool for HTTP status codes with search, browse, and mock response generation
Analyze HTTP headers for security issues, best practices, and get recommendations
Search and browse MIME types with file extensions, categories, and descriptions
