domain: apis
2838 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| Graphify-Labs/graphify Graphify is an open-source (Apache 2.0) Python CLI and /graphify skill that turns a codebase—including docs, SQL schemas, configs, and PDFs… | 77 | 111080 | active |
| Axios Axios is a promise-based HTTP client for the browser and Node.js, supporting request/response interceptors, automatic JSON transformation, … | 99 | 109191 | stable |
| fastapi/fastapi FastAPI is a modern, high-performance Python web framework for building APIs, based on standard Python type hints and built on Starlette an… | 94 | 101864 | active |
| Gin Web Framework Gin is a high-performance HTTP web framework written in Go, offering a Martini-like API with dramatically faster routing powered by httprou… | 80 | 89117 | stable |
| hoppscotch/hoppscotch Hoppscotch is an open-source API development ecosystem for building, testing, and documenting HTTP, REST, GraphQL, and WebSocket requests. … | 98 | 80100 | active |
| NestJS NestJS is a progressive Node.js framework for building efficient, scalable, enterprise-grade server-side applications in TypeScript or Java… | 95 | 76465 | stable |
| typicode/json-server A Node.js CLI tool that turns a JSON file into a full fake REST API with CRUD endpoints, filtering, and pagination in seconds. It is widely… | 79 | 75690 | active |
| OpenBB-finance/OpenBB OpenBB's Open Data Platform (ODP) is an open-source Python toolset that integrates proprietary, licensed, and public financial data sources… | 91 | 72337 | active |
| pallets/flask Flask is a lightweight WSGI web application framework for Python, built on Werkzeug and Jinja. It provides routing, templating, and request… | 81 | 72138 | stable |
| Protocol Buffers Protocol Buffers (protobuf) is Google's language-neutral, platform-neutral mechanism for serializing structured data, comprising the protoc… | 99 | 71825 | stable |
| Express.js Express is a fast, unopinionated, minimalist web framework for Node.js providing robust routing, HTTP helpers, and middleware support. It i… | 94 | 69395 | stable |
| makeplane/plane Plane is an open-source project management platform offering issue tracking, cycles/sprints, kanban boards, roadmaps, and an integrated wik… | 99 | 58357 | active |
| psf/requests Requests is a widely-used Python library for making HTTP/1.1 requests with a simple, human-friendly API. It handles connection pooling, ses… | 94 | 54248 | stable |
| nlohmann/json A header-only C++ library providing JSON parsing, serialization, and manipulation with an intuitive STL-like API. It supports JSON Pointer,… | 67 | 50471 | stable |
| TanStack/query TanStack Query (formerly React Query) is a TypeScript library for asynchronous state management that handles fetching, caching, synchronizi… | 95 | 50211 | stable |
| CLIProxyAPI A Go-based proxy server that exposes OpenAI/Gemini/Claude/Codex-compatible API endpoints backed by CLI AI assistant accounts (Claude Code, … | 81 | 48891 | active |
| usebruno/bruno Bruno is an open-source desktop IDE for exploring and testing REST and GraphQL APIs, positioned as a lightweight alternative to Postman and… | 95 | 46566 | active |
| QuantumNous/new-api New API is a self-hosted LLM gateway and AI asset management system that aggregates 30+ model providers behind a single unified endpoint. I… | 90 | 46459 | active |
| cli/cli GitHub's official command line tool (gh) that brings pull requests, issues, releases, and other GitHub features to the terminal alongside g… | 95 | 46011 | stable |
| gRPC gRPC is a high-performance, open-source universal RPC framework that lets client and server applications communicate transparently across l… | 97 | 45264 | stable |
| spf13/cobra Cobra is a Go library for building powerful, modern command-line applications with nested subcommands, POSIX-compliant flags, and automatic… | 77 | 44514 | stable |
| Kong Gateway Kong Gateway is a cloud-native, high-performance API gateway that proxies, routes, load-balances, and secures API, LLM, and MCP traffic, ex… | 91 | 44045 | stable |
| lysine-dev/retrofit Retrofit is a type-safe HTTP client for Android and the JVM that turns REST APIs into Java or Kotlin interfaces using annotations. It gener… | 79 | 43934 | stable |
| ccxt/ccxt CCXT is a unified trading API library supporting 100+ cryptocurrency exchanges and prediction markets across JavaScript/TypeScript, Python,… | 95 | 43756 | active |
| juspay/hyperswitch Hyperswitch is an open-source, composable payments orchestration platform written in Rust by Juspay, connecting to 300+ payment processors,… | 95 | 43537 | active |
| colinhacks/zod Zod is a TypeScript-first schema validation library for defining and validating data structures at runtime with static type inference. It h… | 89 | 43535 | stable |
| curl/curl curl is a command-line tool and libcurl is a C library for transferring data to or from servers using URL syntax, supporting dozens of prot… | 92 | 42687 | stable |
| chatanywhere/GPT_API_free A hosted API forwarding/proxy service that provides free daily-quota access to GPT, DeepSeek, Claude, Gemini, and other major LLMs via a un… | 72 | 41190 | active |
| Fiber Fiber is an Express-inspired web framework for Go built on top of Fasthttp, focused on zero memory allocation and high performance. It prov… | 94 | 40091 | stable |
| Kong/insomnia Insomnia is an open-source, cross-platform desktop API client for debugging, designing, testing, and mocking APIs across REST, GraphQL, Web… | 99 | 39954 | active |
| Wei-Shaw/sub2api Sub2API is a self-hosted AI API gateway written in Go that converts Claude, OpenAI, Gemini, and Grok subscriptions into unified API access.… | 83 | 39526 | active |
| httpie/cli HTTPie CLI is a modern, user-friendly command-line HTTP client written in Python for testing, debugging, and interacting with APIs and HTTP… | 23 | 38457 | stable |
| dotnet/aspnetcore ASP.NET Core is the open-source, cross-platform web framework for .NET, used to build modern cloud-based web applications, APIs, IoT apps, … | 98 | 38394 | stable |
| fastify/fastify Fastify is a fast, low-overhead web framework for Node.js with a powerful plugin architecture, JSON Schema-based validation and serializati… | 99 | 37025 | stable |
| songquanpeng/one-api One API is a self-hosted LLM API gateway and key management system that unifies OpenAI, Azure, Anthropic Claude, Google Gemini, DeepSeek, a… | 55 | 36591 | stable |
| Koa Koa is an expressive HTTP middleware framework for Node.js built by the Express team, using async functions for cascading middleware. It ha… | 94 | 35689 | stable |
| jqlang/jq jq is a lightweight command-line JSON processor written in portable C with zero runtime dependencies. It lets users slice, filter, map, and… | 84 | 35488 | stable |
| binarywang/WxJava WxJava is a comprehensive Java SDK for WeChat backend development, covering WeChat Pay, Mini Programs, Official Accounts, Open Platform, En… | 76 | 33051 | active |
| labstack/echo Echo is a high-performance, minimalist web framework for Go built on the standard net/http package, featuring a zero-allocation radix-tree … | 97 | 32659 | stable |
| github/github-mcp-server GitHub's official Model Context Protocol (MCP) server that connects AI tools like Claude, Cursor, and VS Code directly to GitHub's platform… | 83 | 32535 | active |
| vercel/swr SWR is a React Hooks library for data fetching, named after the stale-while-revalidate caching strategy. It returns cached data first, then… | 94 | 32473 | stable |
| Beego Beego is a high-performance, full-stack web framework for Go, inspired by Tornado, Sinatra, and Flask. It bundles an ORM, session managemen… | 92 | 32414 | active |
| Hasura GraphQL Engine Hasura GraphQL Engine is an open-source engine that auto-generates instant, realtime GraphQL APIs (and REST endpoints) over existing databa… | 98 | 32098 | active |
| honojs/hono Hono is a small, ultrafast web framework built on Web Standards APIs with zero dependencies. It runs on any JavaScript runtime including Cl… | 95 | 31977 | stable |
| openai/openai-python The official Python client library for the OpenAI REST API, generated from OpenAI's OpenAPI specification. It provides typed, synchronous a… | 95 | 31467 | stable |
| lbjlaq/Antigravity-Manager Antigravity Tools is a desktop application built with Tauri v2, React, and Rust that manages multiple AI service accounts and provides one-… | 79 | 30738 | active |
| googleworkspace/cli A single command-line tool (`gws`) for interacting with all Google Workspace APIs — Drive, Gmail, Calendar, Sheets, Docs, Chat, Admin, and … | 74 | 30577 | active |
| spf13/viper Viper is a comprehensive configuration library for Go applications that reads from files, environment variables, command-line flags, and re… | 60 | 30447 | stable |
| chubin/wttr.in wttr.in is a console-oriented weather forecast service that renders weather reports as ANSI terminal art, HTML, or PNG, accessible via curl… | 75 | 30415 | active |
| encode/django-rest-framework Django REST framework is a powerful and flexible toolkit for building Web APIs on top of Django. It provides serializers, class-based views… | 94 | 30144 | stable |
| ComposioHQ/composio Composio is an SDK platform (TypeScript and Python SDKs plus a CLI) that gives AI agents access to 1000+ pre-built app toolkits with per-us… | 88 | 29893 | active |
| swagger-api/swagger-ui Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate interactive API documentation from an OpenAPI (Swa… | 99 | 28990 | stable |
| Pydantic Pydantic is the most widely used data validation library for Python, defining schemas via type hints and validating, parsing, and serializi… | 94 | 28626 | stable |
| PostgREST/postgrest PostgREST is a standalone web server that automatically exposes any existing PostgreSQL database as a fully RESTful HTTP API. Written in Ha… | 99 | 27629 | stable |
| PrefectHQ/fastmcp FastMCP is a Python framework for building Model Context Protocol (MCP) servers, clients, and interactive applications. It turns ordinary P… | 83 | 27399 | active |
| tokio-rs/axum Axum is an HTTP routing and request-handling library for Rust built on Tokio, focusing on ergonomics and modularity. It integrates deeply w… | 92 | 26963 | stable |
| discord.js discord.js is a powerful, object-oriented Node.js library for interacting with the Discord API, covering gateway events, REST calls, slash … | 92 | 26805 | stable |
| OpenAPI Generator OpenAPI Generator is a Java-based tool that generates API client libraries, server stubs, documentation, and configuration from OpenAPI 2.0… | 95 | 26685 | stable |
| decolua/9router 9Router is a self-hosted AI gateway/router that connects AI coding tools like Claude Code, Cursor, Codex, and Cline to 60+ LLM providers th… | 75 | 26418 | active |
| Vapor Vapor is a server-side HTTP web framework written in Swift, built on SwiftNIO with a non-blocking, event-driven architecture. It includes a… | 99 | 26192 | stable |
| rwf2/Rocket Rocket is an async web framework for Rust focused on usability, security, extensibility, and speed. It provides macro-based routing, compil… | 49 | 25782 | stable |
| kataras/iris Iris is a fast, feature-rich HTTP/2 web framework for Go with first-class MVC support, built-in dependency injection, and an expressive API… | 65 | 25558 | active |
| Agent2Agent (A2A) Protocol Agent2Agent (A2A) is an open protocol, hosted under the Linux Foundation, that standardizes communication and interoperability between opaq… | 82 | 25503 | active |
| toon-format/toon TOON (Token-Oriented Object Notation) is a compact, human-readable encoding of the JSON data model designed to reduce token usage in LLM pr… | 83 | 25261 | active |
| ranaroussi/yfinance yfinance is a Python library that fetches financial and market data from Yahoo! Finance's publicly available APIs, returning data as pandas… | 99 | 25084 | stable |
| gorilla/websocket gorilla/websocket is a fast, well-tested Go implementation of the WebSocket protocol (RFC 6455) for both clients and servers. It is part of… | 28 | 24858 | stable |
| actix/actix-web Actix Web is a powerful, pragmatic, and extremely fast asynchronous web framework for Rust. It provides type-safe routing, flexible respond… | 99 | 24801 | stable |
| gitlabhq/gitlabhq GitLab is an open-core DevOps platform for hosting Git repositories with merge requests, code review, CI/CD pipelines, issue tracking, and … | 77 | 24540 | active |
| guzzle/guzzle Guzzle is an extensible PHP HTTP client for sending HTTP requests and integrating with web services. It supports synchronous and asynchrono… | 99 | 23457 | stable |
| Saleor Saleor is an open-source, headless e-commerce platform exposing a GraphQL-only API for catalog, checkout, orders, payments, and promotions.… | 95 | 23266 | stable |
| phoenixframework/phoenix Phoenix is a productive, full-featured web framework for Elixir that emphasizes developer productivity and real-time features. It supports … | 99 | 23125 | stable |
| SwiftyJSON SwiftyJSON is a Swift library that simplifies parsing and manipulating JSON data with convenient subscript access and automatic optional ha… | 67 | 22949 | stable |
| Sails.js Sails.js is a realtime MVC web framework for Node.js, built on Express and Socket.io, designed to resemble Ruby on Rails. It bundles the Wa… | 61 | 22804 | stable |
| go-chi/chi chi is a lightweight, idiomatic HTTP router for Go that is 100% compatible with net/http and built around the context package. It supports … | 94 | 22737 | stable |
| wwebjs/whatsapp-web.js whatsapp-web.js is a Node.js client library that connects to WhatsApp through the WhatsApp Web browser app using Puppeteer, exposing nearly… | 93 | 22475 | active |
| AKShare AKShare is a Python library providing a unified interface for fetching financial and economic data (stocks, futures, bonds, options, funds,… | 95 | 22247 | active |
| gorilla/mux gorilla/mux is a powerful HTTP request router and URL matcher for Go web servers, implementing the standard http.Handler interface. It supp… | 23 | 21838 | stable |
| dgraph-io/dgraph Dgraph is a distributed, horizontally scalable graph database with native GraphQL support, written in Go. It provides ACID transactions, co… | 99 | 21780 | stable |
| Parse Server Parse Server is an open-source Backend-as-a-Service (BaaS) that runs on Node.js with the Express framework, providing REST and GraphQL APIs… | 95 | 21411 | active |
| graphql/graphql-js GraphQL.js is the JavaScript/TypeScript reference implementation of the GraphQL query language for APIs. It provides tools for building Gra… | 96 | 20343 | stable |
| grpc-ecosystem/grpc-gateway A protoc plugin that reads protobuf service definitions with google.api.http annotations and generates a reverse-proxy server translating R… | 98 | 19991 | stable |
| Apollo Client Apollo Client is a comprehensive GraphQL client library for TypeScript and JavaScript, with first-class support for React, Vue, Angular, Sv… | 94 | 19811 | stable |
| lionsoul2014/ip2region ip2region is an offline IP-to-region localization library and IP data management framework supporting both IPv4 and IPv6 with city-level re… | 96 | 19468 | stable |
| Orange-OpenSource/hurl Hurl is a command line tool written in Rust that runs HTTP requests defined in a simple plain text format, built on top of libcurl. It doub… | 84 | 19160 | stable |
| mountain-loop/yaak Yaak is an open-source, local-first desktop API client for sending HTTP, GraphQL, WebSocket, Server-Sent Events, and gRPC requests, built w… | 97 | 19120 | active |
| elysiajs/elysia Elysia is a TypeScript backend web framework built for Bun, emphasizing end-to-end type safety, schema-driven validation, and ergonomic dev… | 94 | 18975 | active |
| facebook/relay Relay is a JavaScript framework and GraphQL client for building data-driven React applications, where components declaratively declare thei… | 90 | 18957 | stable |
| subquery/subql SubQuery is an open-source, multi-chain data indexing framework for web3 that lets developers extract, transform, and query blockchain data… | 76 | 18753 | active |
| sanic-org/sanic Sanic is a fast, asynchronous Python web framework and web server supporting async/await syntax and ASGI compliance. It bundles a productio… | 84 | 18645 | stable |
| keploy/keploy Keploy is a developer-centric API and integration testing platform that records real application traffic, database queries, and streaming e… | 95 | 18424 | active |
| ory/hydra Ory Hydra is an OpenID Certified OAuth 2.0 and OpenID Connect provider server written in Go, handling token issuance, client management, an… | 78 | 17498 | stable |
| julienschmidt/httprouter HttpRouter is a lightweight, high-performance HTTP request router (mux) for Go that supports path variables and method matching using a com… | 23 | 17126 | stable |
| sindresorhus/ky Ky is a tiny, zero-dependency JavaScript HTTP client built on the Fetch API, offering a simpler API with method shortcuts, automatic retrie… | 93 | 17044 | stable |
| apache/apisix Apache APISIX is a dynamic, high-performance cloud-native API gateway and AI gateway built on NGINX and etcd, offering load balancing, dyna… | 95 | 17038 | stable |
| graphql/graphiql GraphiQL is the official GraphQL Foundation reference IDE for exploring and testing GraphQL APIs in the browser, plus a monorepo ecosystem … | 95 | 16899 | active |
| yhirose/cpp-httplib A C++11 single-file header-only HTTP/HTTPS server and client library supporting HTTP/1.1 with SSL/TLS via OpenSSL, MbedTLS, or wolfSSL. It … | 95 | 16780 | active |
| forwardemail/superagent SuperAgent is a small, progressive HTTP request library for Node.js and browsers with an elegant, chainable API supporting callbacks, promi… | 66 | 16641 | stable |
| aio-libs/aiohttp aiohttp is an asynchronous HTTP client and server framework for Python built on asyncio. It supports client and server WebSockets out of th… | 97 | 16526 | stable |
| hyperium/hyper hyper is a fast, correct, low-level HTTP implementation for Rust providing both client and server APIs with HTTP/1 and HTTP/2 support. It i… | 93 | 16296 | stable |
| Rapptz/discord.py discord.py is a modern, async-ready Python library wrapping the Discord API, including a commands extension for building bots. It handles r… | 75 | 16155 | stable |
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