MCP Servers for API

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

🧙‍♀️ Move Fast and Break Nothing. End-to-end typesafe APIs made easy.

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

Beautiful static documentation for your API

The OpenAPI Specification Repository

Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

📘 OpenAPI/Swagger-generated API Reference Documentation

The API and real-time application framework

Swagger Editor

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

Node.js library for the Stripe API.

Examples of using Pipedream's MCP server in your app or AI agent.

The open source Node.js client for MessageBird's REST API

Monorepo providing 1) OpenAPI to MCP Tool generator 2) Exposing all of Twilio's API as MCP Tools

MCP Server for Apache Airflow

A comprehensive Model Context Protocol (MCP) server for QA/SDET engineers that provides API testing capabilities with Swagger/OpenAPI, Postman collection and GraphQL support.

Sendrid API Integration For LLM