API Clients & Documentation
API Hub
A centralized marketplace and discovery platform for finding, testing, and connecting to third-party APIs.
Bruno
A Git-native, local-first API client that stores collections as plain-text files directly within your project repository.
DeepDocs
An AI-powered GitHub agent that automatically scans repositories to update documentation whenever code changes.
GitBook
Documentation platform for creating, managing, and publishing technical knowledge bases with AI-powered search and synchronization features.
Hoppscotch
An open-source API development ecosystem for testing, documenting, and managing REST, GraphQL, and WebSocket requests.
Insomnia
An API design, testing, and debugging platform supporting REST, gRPC, GraphQL, and MCP with Git integration and automated CI/CD workflows.
JSONPlaceholder
Free online REST API providing fake data for testing, prototyping, and code examples without setting up a backend server.
Mintlify
Documentation and knowledge platform designed for developers and AI agents with self-updating capabilities.
Mock Service Worker
API mocking library for JavaScript using Service Workers to intercept REST and GraphQL requests for testing and development.
PlantUML
Create UML and non-UML diagrams from plain text descriptions using a domain-specific language and layout engines like Graphviz.
Postman
An API platform for developing, testing, managing, and distributing APIs and services with integrated AI capabilities.
RapidAPI for Mac
Full-featured HTTP client and API development tool for macOS. Design, test, describe, and collaborate on APIs with support for Swagger and RAML.
readme.so
A web-based editor for creating and customizing project README files using a modular interface.
Requestly
Git-native API client for designing, building, and testing APIs locally.
Scalar
API reference documentation and developer tool suite.
Stoplight
API design, documentation, and governance platform supporting OpenAPI specifications, collaborative development, and reusable components.
Swagger
API development and design toolset supporting OpenAPI and AsyncAPI specifications for documentation, testing, and code generation.
Test API
Browser extension for testing and debugging RESTful APIs and HTTP endpoints locally.
Voiden.md
An offline-first, Git-native API client that integrates request testing and documentation into plain Markdown files.