API & Webhook Tools
API Request Builder
Visual API request builder - Test REST APIs like Postman with custom headers and body
GraphQL Query Builder
Visual GraphQL query builder - Build queries with fields, variables, and nesting
API Response Formatter
Format and beautify JSON/XML API responses - Validate and minify data
CORS Config Generator
Generates CORS configuration headers for Nginx, Apache, and Express.js applications
HTTP Header Builder
Build and format HTTP headers for API requests
Webhook URL Builder
Build and validate webhook URLs with authentication parameters like API keys, tokens, and signatures
API Timeout Calculator
Calculate optimal timeout values for API calls based on network latency and retry logic
API Signature Generator
Generate HMAC signatures for API authentication using SHA256, SHA1, and MD5 algorithms
Webhook Signature Verifier
Verify HMAC signatures from webhook payloads (Stripe, GitHub, Slack, etc.)
API Rate Limit Calculator
Calculate API rate limit windows, request quotas, and usage timelines for API design
OAuth 2.0 URL Builder
Generate OAuth 2.0 authorization URLs with proper parameter encoding for secure integrations
Mock API Server
Generate fake REST API endpoints from JSON data for testing and development
GraphQL Schema Generator
Generate GraphQL schemas from JSON data or define types manually
JSON Placeholder Generator
Generate fake JSON API responses with realistic placeholder data for testing
API Response Time Analyzer
Analyze API response times, calculate percentiles, and track performance metrics