APIs

An MCP server, CLI and Python/JavaScript SDK for searching and booking real flights and hotels through AI agents, holding the fare on a card only when a booking actually completes.

• MCP servers
• APIs

A self-hosted, open-source API management platform that turns databases, microservices, and custom business logic into REST APIs and AI agent tools, with a developer portal and SDK generation.

• APIs
• Backend

The official TypeScript SDK for the Claude API, providing typed access to Anthropic's language models for server-side JavaScript and TypeScript applications across Node.js, Deno, Bun, Cloudflare Workers and Vercel Edge.

• Libraries
• APIs

A set of helper libraries for NestJS that generate fast runtime validators, a typed client SDK with a mockup backend simulator, automatic Swagger docs and end-to-end test functions from pure TypeScript types, plus an LLM function-calling library.

• APIs
• Backend

A command-line compiler that converts OpenAPI descriptions between JSON, YAML, and an equivalent Protocol Buffer representation, with a plugin interface for code generation and other API tooling.

• APIs

A high-performance API service for classical Chinese poetry, offering REST and GraphQL access to close to 400,000 poems with simplified and traditional Chinese, full-text search, and rate limiting.

• APIs

A Python metasearch library that aggregates text, image, video, news, and book search results from services such as Bing, Brave, DuckDuckGo, and Google, usable as a library, CLI, API server, or MCP server.

• MCP servers
• APIs

An Obsidian plugin that exposes a vault through an authenticated REST API and a built-in MCP server, so scripts, browser extensions, and AI agents can read, search, and edit notes.

• MCP servers
• APIs

Apollo CLI is a command-line tool that brings together GraphQL clients and servers: it validates a schema, lints operations for compatibility, and generates static types for client-side type safety.

• CLI tools
• APIs

A Python library, command-line tool and MCP server for searching Google Flights directly through its own API, without web scraping or browser automation.

• CLI tools
• APIs

A tool that generates interactive API documentation, typed SDKs, and an MCP server from OpenAPI, AsyncAPI, GraphQL, gRPC, OpenRPC, and Markdown sources in one project configuration.

• APIs
• Documentation tools

A hosted registry and proxy that lets an AI agent call thousands of paid third-party tool APIs, and a team's own tools, through one base URL and one token, without holding provider credentials.

• APIs

An official Tonghuashun (HiThink) data service providing A-share market quotes, financial statements, indices and other market data for AI agents, quantitative research and application development.

• APIs

A simple proxy that exposes any MCP server's tools as a standard, secure OpenAPI-compatible HTTP server, so they work with tools, SDKs and UIs that expect REST APIs instead of raw MCP transport.

• MCP servers
• APIs

A production-ready REST and Model Context Protocol API layer for an existing or new PostgreSQL database, adding CRUD, custom SQL routes, authentication, and access control without writing backend code.

• APIs
• Databases

An early, publicly released version of an agent that generates runnable Python integration code for platforms without an official API, by analyzing a browser's recorded network requests.

• APIs
• Browser automation

A PHP-based, self-hosted URL shortener that serves shortened links under your own domain, with a REST API and official Docker image.

• APIs
• Networking

An ecosystem of code generators that turn OpenAPI specifications into production-ready TypeScript or Python SDKs, along with validators, mocks, and other client code.

• APIs

A design-first Go framework that generates HTTP, gRPC, and JSON-RPC servers and clients, along with OpenAPI and protobuf specifications, from a single design written in Go.

• APIs
• Backend

A free, open-source tool for designing and running mock APIs locally, combining a desktop app with a CLI for headless and CI environments and optional cloud collaboration.

• Testing
• APIs

An open-source, cloud-native API and AI gateway supporting REST, GraphQL, TCP, gRPC and MCP traffic, with rate limiting, authentication, analytics and per-tool access control for AI agents.

• LLM gateways
• APIs

An open-source product-integration platform that gives agents, backend services and customer-facing dashboards one consistent REST API and syntax for connecting to third-party apps.

• APIs

A self-hosted, open-source WhatsApp API gateway with a pluggable architecture for its database, storage, and cache backends, and session- and chat-scoped API keys.

• APIs

A free, open-source machine translation API that runs entirely self-hosted, using the open-source Argos Translate library instead of proprietary services such as Google or Azure.

• APIs