domain: apis
2838 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| danog/MadelineProto MadelineProto is an async PHP library implementing the Telegram MTProto protocol, allowing full client functionality (user or bot login) wi… | 92 | 3501 | active |
| MZCretin/RollToolsApi RollToolsApi is a free, long-maintained aggregated REST API service that provides commonly used data endpoints for developers, hosted on an… | 73 | 3478 | active |
| pistacheio/pistache Pistache is a modern, elegant HTTP and REST framework written in pure C++17. It provides a multi-threaded HTTP server, an asynchronous HTTP… | 75 | 3473 | active |
| tulios/json-viewer A Chrome browser extension that pretty-prints and syntax-highlights JSON and JSONP responses directly in the browser. It offers 27 themes, … | 32 | 3455 | active |
| json-schema-faker/json-schema-faker A JavaScript library that generates valid, realistic fake JSON data from JSON Schema definitions, supporting JSON Schema 2019-09 and 2020-1… | 92 | 3448 | active |
| openai/openai-go The official Go client library for the OpenAI REST API, providing typed access to models, the Responses API, conversations, and other OpenA… | 86 | 3434 | active |
| google/volley Volley is Google's HTTP networking library for Android that simplifies and speeds up network requests in mobile apps. It provides automatic… | 85 | 3420 | stable |
| roapi/roapi ROAPI automatically spins up read-only REST, GraphQL, SQL, and FlightSQL query APIs over static or slowly moving datasets without writing a… | 80 | 3420 | active |
| zigzap/zap Zap is a fast, robust web microframework for Zig that wraps the facil.io C networking library to build HTTP servers and REST APIs. It provi… | 73 | 3412 | stable |
| terminusdb/terminusdb TerminusDB is an open-source document graph database with built-in git-like version control, storing JSON/JSON-LD documents in a schema-enf… | 93 | 3394 | active |
| Netflix/dgs-framework DGS Framework (Domain Graph Service) is a GraphQL server framework for Spring Boot, developed and maintained by Netflix. It provides an ann… | 95 | 3385 | active |
| slackapi/node-slack-sdk The official Slack Developer Kit for Node.js, a collection of single-purpose TypeScript packages covering Slack's Web API, OAuth flows, Inc… | 93 | 3377 | active |
| svix/svix-webhooks Svix is an open-source, enterprise-ready webhooks-as-a-service platform written in Rust that lets developers send webhooks with a single AP… | 95 | 3371 | active |
| akheron/jansson Jansson is a C library for encoding, decoding, and manipulating JSON data. It offers a simple API, full UTF-8 Unicode support, and no depen… | 82 | 3359 | stable |
| metorial/metorial Metorial is an open-source identity and access control plane for AI agents, providing 1200+ verified MCP integrations with centralized auth… | 64 | 3350 | active |
| leafo/lapis Lapis is a web framework for Lua and MoonScript that primarily targets OpenResty (Lua embedded in Nginx), with support for other server env… | 90 | 3338 | stable |
| bcherny/json-schema-to-typescript A TypeScript library and CLI (json2ts) that compiles JSON Schema definitions into TypeScript type declarations. It can be used programmatic… | 77 | 3337 | active |
| awslabs/aws-sdk-rust The official AWS SDK for Rust, providing one generated crate per AWS service plus a shared aws-config crate for credential and region loadi… | 95 | 3336 | stable |
| Universal-Commerce-Protocol/ucp The Universal Commerce Protocol (UCP) is an open standard and specification for interoperable, agentic commerce, defining capabilities like… | 78 | 3334 | active |
| overtrue/easy-sms A PHP library that provides a unified API for sending SMS messages through dozens of Chinese and international SMS gateway providers (Aliba… | 74 | 3334 | active |
| ding113/claude-code-hub CC Hub is a self-hosted AI API proxy and gateway service for Claude Code, Codex, and other OpenAI/Claude-compatible APIs, built with Next.j… | 84 | 3333 | active |
| jsoniter jsoniter is a high-performance JSON serialization and parsing library for Go (with a Java variant) that serves as a 100% compatible drop-in… | 10 | 13876 | maintenance |
| apache/avro Apache Avro is a data serialization system providing rich data structures, a compact binary format, container files, and RPC support, with … | 88 | 3301 | stable |
| php-curl-class/php-curl-class PHP Curl Class is a PHP library that wraps PHP's cURL extension in a simple object-oriented API for sending HTTP requests. It supports GET,… | 93 | 3297 | active |
| cyu/rack-cors Rack middleware that adds Cross-Origin Resource Sharing (CORS) support to Rack-compatible Ruby web applications, including Rails. It lets y… | 42 | 3290 | active |
| json-c/json-c json-c is a C library implementing a reference-counted object model for constructing, serializing, and parsing JSON, aiming to conform to R… | 84 | 3287 | stable |
| getkin/kin-openapi A Go library implementing the OpenAPI 2.0, 3.0, 3.1, and (partially) 3.2 specifications. It provides parsing, conversion, and validation of… | 99 | 3284 | active |
| zino-hofmann/graphql-flutter A GraphQL client for Dart and Flutter providing queries, mutations, subscriptions, caching, and optimistic updates through a widget-based A… | 84 | 3270 | active |
| postmanlabs/httpbin httpbin is a simple HTTP request and response service written in Python with Flask that echoes back request details as JSON. It is used for… | 23 | 13609 | maintenance |
| microsurging/surging Surging is a distributed microservice engine for .NET Core providing a lightweight, high-performance, modular RPC pipeline with service reg… | 57 | 3263 | active |
| Stoat Stoat is the Rust backend software powering Stoat chat, a self-hostable community chat platform descended from Revolt. It consists of modul… | 99 | 3254 | active |
| assetnote/kiterunner Kiterunner is a fast content discovery tool written in Go that bruteforces files, folders, and API routes on web servers. It uses a dataset… | 64 | 3247 | stable |
| openid/AppAuth-Android AppAuth for Android is a client SDK for communicating with OAuth 2.0 and OpenID Connect providers from Android apps. It follows RFC 8252 be… | 65 | 3238 | active |
| alexrudall/ruby-openai A Ruby gem providing a client for the OpenAI API, supporting chat completions, the Responses API, streaming, vision, audio (Whisper), image… | 72 | 3222 | active |
| dotnet/aspnet-api-versioning A set of .NET libraries that add API versioning semantics to ASP.NET Core services, including Minimal APIs, MVC controllers, gRPC, OData, a… | 90 | 3205 | active |
| dotnet/extensions A suite of .NET libraries from Microsoft providing production-ready capabilities such as resilience pipelines, telemetry, diagnostics, comp… | 98 | 3202 | active |
| UsefulSoftwareCo/executor Executor is an open-source integration layer and MCP gateway for AI agents, letting you configure MCP servers, OpenAPI specs, GraphQL APIs,… | 78 | 3200 | active |
| googleapis/google-cloud-node The official Google Cloud Client Library for Node.js, a monorepo containing idiomatic npm client libraries for interacting with individual … | 95 | 3195 | stable |
| stoplightio/spectral Spectral is a flexible JSON/YAML linter for creating automated API style guides, with built-in rulesets for OpenAPI v2/v3.x, AsyncAPI v2.x,… | 94 | 3189 | active |
| sideshow/apns2 A Go library for sending push notifications to iOS, macOS, tvOS, and Safari apps via Apple's APNs HTTP/2 provider API. It supports certific… | 38 | 3188 | active |
| gcui-art/suno-api An unofficial open-source API wrapper for Suno.ai's AI music generation service, exposing endpoints for generating songs, lyrics, and audio… | 56 | 3184 | active |
| hypothesis/h h is the backend web application behind hypothes.is, serving the website and the web annotation API that clients use to create, share, and … | 67 | 3176 | active |
| strongloop/loopback LoopBack is a highly-extensible Node.js framework for building dynamic end-to-end REST APIs and microservices with model-driven development… | 23 | 13161 | maintenance |
| SteamRE/SteamKit SteamKit2 is a .NET library for interoperating with Valve's Steam network protocol. It provides a simple, extensible interface for performi… | 82 | 3169 | active |
| warp-drive-data/warp-drive WarpDrive (formerly EmberData) is a lightweight, typed, reactive data library for web applications that works with any framework including … | 81 | 3155 | active |
| dosco/graphjin GraphJin is a Go compiler and runtime that turns GraphQL queries into optimized, policy-checked SQL across many databases, files, and APIs,… | 95 | 3150 | active |
| graphprotocol/graph-node Graph Node is the core indexing component of The Graph protocol, written in Rust. It extracts and organizes data from blockchains such as E… | 94 | 3146 | active |
| liaohch3/claude-tap claude-tap is a local proxy and trace viewer for AI coding agents like Claude Code, Codex CLI, and Gemini CLI. It intercepts real API traff… | 77 | 3125 | active |
| punitarani/fli Fli is a Python library, CLI, and MCP server that provides programmatic access to Google Flights data by interacting directly with Google F… | 80 | 3124 | active |
| khoren93/SwiftHub SwiftHub is an open-source GitHub client app for iOS built with Swift, RxSwift, and MVVM-C clean architecture. It provides repository and u… | 53 | 3117 | active |
| apiato/apiato Apiato is a PHP framework built on top of Laravel for creating scalable, testable, API-centric applications using the Porto architectural p… | 78 | 3109 | active |
| davidfowl/TodoApp A sample Todo application built with ASP.NET Core, featuring a Blazor WebAssembly frontend and a Minimal APIs REST backend. It demonstrates… | 62 | 3102 | active |
| tsedio/tsed Ts.ED is a TypeScript framework for Node.js and Bun built on top of Express.js, Koa.js, or Fastify.js, using decorators and class-based arc… | 95 | 3087 | active |
| httprb/http http.rb is a fast, easy-to-use Ruby HTTP client library with a chainable API. It implements the HTTP protocol natively using the llhttp par… | 93 | 3084 | active |
| textbee/textbee TextBee is an open-source SMS gateway that turns any Android phone into an SMS API, letting you send and receive text messages via a REST A… | 91 | 3062 | active |
| googlemaps/google-maps-services-js The official Node.js/TypeScript client library for Google Maps API Web Services, covering Geocoding, Elevation, Roads, Time Zone, Maps Stat… | 68 | 3061 | stable |
| vpulim/node-soap A Node.js library providing both a SOAP client and a SOAP server, with WSDL parsing, SOAP header handling, security options, and async meth… | 99 | 3038 | active |
| huangxd-/danmu_api A JavaScript-based danmaku (bullet comment) API server that aggregates danmu from major Chinese and international video platforms (Bilibili… | 62 | 3036 | active |
| x-dr/chatgptProxyAPI A self-deployable reverse proxy for the OpenAI API built on Cloudflare Workers and Cloudflare Pages, letting users replace api.openai.com w… | 10 | 3029 | active |
| alibaba/pont Pont (French for 'bridge') is a data service layer solution that converts API documentation platforms like Swagger into metadata, then gene… | 23 | 3020 | active |
| elixir-plug/plug Plug is an Elixir library and specification for composing web applications from small functional pieces, with connection adapters for web s… | 77 | 3013 | stable |
| komoot/photon Photon is an open source geocoder for OpenStreetMap data built on OpenSearch, supporting forward and reverse geocoding with multilingual, t… | 94 | 3005 | active |
| protobuf-c/protobuf-c A pure C implementation of Google's Protocol Buffers data serialization format, including libprotobuf-c for encoding/decoding and protoc-ge… | 74 | 2988 | stable |
| googleapis/google-api-nodejs-client Google's officially supported Node.js client library for accessing Google APIs, with auto-generated endpoints for all APIs listed in the Go… | 95 | 12232 | maintenance |
| kevin1024/vcrpy VCR.py is a Python library that records HTTP interactions to cassette files and replays them in later test runs, eliminating real network t… | 96 | 2981 | active |
| oauthlib/oauthlib OAuthLib is a Python framework implementing the OAuth 1.0 (RFC 5849) and OAuth 2.0 (RFC 6749) request-signing and authorization logic in a … | 75 | 2980 | stable |
| stephenberry/glaze Glaze is an extremely fast, header-only C++ serialization and reflection library supporting JSON, BEVE, CBOR, BSON, CSV, MessagePack, TOML,… | 95 | 2978 | active |
| jsr-io/jsr JSR is the open-source package registry for modern JavaScript and TypeScript, serving as an npm-compatible alternative with native TypeScri… | 70 | 2969 | active |
| 0no-co/gql.tada gql.tada is a GraphQL document authoring library for TypeScript that infers result and variables types of queries and fragments directly in… | 94 | 2968 | active |
| BrasilAPI/cep-promise A JavaScript library for looking up Brazilian postal codes (CEP) that queries multiple providers (Correios, ViaCEP, WideNet) concurrently a… | 23 | 2968 | stable |
| WecomTeam/wecom-cli The official WeCom (WeChat Work) command-line tool written in Rust, letting humans and AI agents operate WeCom from the terminal. It covers… | 59 | 2965 | active |
| nicolasff/webdis Webdis is a lightweight HTTP server written in C that exposes Redis commands over HTTP with JSON output. It supports JSONP, chunked pub/sub… | 70 | 2964 | active |
| sigma67/ytmusicapi A Python 3 library that provides an unofficial API client for YouTube Music by emulating the web client's requests, using user cookie data … | 94 | 2962 | active |
| Pycord-Development/pycord Pycord is a modern, async-ready Python library that wraps the Discord API, enabling developers to build Discord bots and applications. It p… | 94 | 2955 | active |
| duolahypercho/codex-router A local model router that lets external LLM providers (Anthropic, Kimi, DeepSeek, xAI, GitHub Copilot, and others) be used inside the Codex… | 80 | 2953 | active |
| dwgx/WindsurfAPI A zero-dependency Node.js reverse proxy that exposes Windsurf/Devin Desktop's 100+ cloud AI models (Claude, GPT, Gemini, DeepSeek, Kimi, GL… | 77 | 2950 | active |
| avast/retry-go A simple Go library providing a retry mechanism for retrying failing operations with configurable attempts, delays, and backoff strategies.… | 76 | 2947 | stable |
| microsoft/restler-fuzzer RESTler is the first stateful REST API fuzzing tool, automatically testing cloud services through their REST APIs to find security and reli… | 71 | 2939 | active |
| ErlichLiu/DeepClaude DeepClaude is a self-hostable service that chains DeepSeek R1's reasoning output with Claude Sonnet or Gemini models to produce a combined … | 52 | 2936 | active |
| DarkaOnLine/L5-Swagger L5-Swagger is a Laravel package that integrates swagger-php and Swagger UI to generate and serve OpenAPI/Swagger documentation for Laravel … | 90 | 2931 | active |
| michaelfeil/infinity Infinity is a high-throughput, low-latency serving engine that exposes text-embedding, reranking, CLIP, CLAP and ColPali models via an Open… | 63 | 2917 | active |
| Binance Python Connector A collection of auto-generated Python SDKs for the Binance public APIs, covering spot, futures, options, and other trading services. It pro… | 77 | 2916 | active |
| openctp/openctp openctp is a CTPAPI-compatible interface layer and trading platform ecosystem for Chinese futures and securities markets. It wraps broker c… | 75 | 2910 | active |
| Ovi/DummyJSON DummyJSON is a free hosted fake REST API that serves placeholder JSON data (products, users, carts, posts, quotes, todos, recipes) for fron… | 73 | 2904 | active |
| tinyhttp/tinyhttp tinyhttp is a modern, Express-like web framework for Node.js written in TypeScript and compiled to native ESM. It offers a minimal dependen… | 93 | 2899 | active |
| rs/cors rs/cors is a Go library providing a configurable net/http handler that implements the Cross Origin Resource Sharing (CORS) W3C specificatio… | 70 | 2898 | stable |
| googleapis/google-api-ruby-client A set of auto-generated Ruby REST client libraries for Google APIs, built from Discovery Documents, plus the code generator itself. Each cl… | 97 | 2896 | stable |
| overtrue/laravel-wechat A Laravel integration package wrapping the EasyWeChat SDK, providing WeChat (Weixin) capabilities such as official account message handling… | 72 | 2896 | active |
| bmoscon/cryptofeed A Python library that consumes real-time market data from dozens of cryptocurrency exchanges over websockets (with REST polling fallback) a… | 87 | 2886 | active |
| flightphp/core Flight is a fast, extensible micro-framework for PHP with zero dependencies, designed for quickly building RESTful web applications and API… | 98 | 2884 | active |
| obi1kenobi/trustfall Trustfall is a query engine written in Rust that lets you query arbitrary data sources—APIs, files, databases, even AI models—using a Graph… | 67 | 2884 | active |
| foss42/apidash API Dash is an open-source, AI-powered cross-platform API client built with Flutter for creating and customizing HTTP and GraphQL requests,… | 66 | 2883 | active |
| MartialBE/one-hub One Hub is a self-hosted OpenAI-compatible API management and distribution system forked from songquanpeng/one-api, written in Go. It aggre… | 67 | 2882 | active |
| Sophomoresty/gemini-web2api A single-file Python server that exposes Google Gemini's web interface as an OpenAI-compatible API, supporting chat completions, streaming,… | 57 | 2880 | active |
| cyberjunky/python-garminconnect A Python 3 API wrapper for Garmin Connect that lets you fetch health statistics, activities, workouts, and device data from Garmin wearable… | 99 | 2878 | active |
| Azure/fetch-event-source A TypeScript library providing a fetch()-based alternative to the browser's native EventSource API for consuming server-sent events. It rem… | 54 | 2870 | stable |
| frain-dev/convoy Convoy is an open-source, high-performance webhooks gateway for reliably ingesting, persisting, debugging, and delivering webhook events at… | 95 | 2862 | active |
| octokit/octokit.net Octokit.net is a GitHub API client library for .NET Framework 4.6+ and .NET Standard 2.0+. It provides typed, async access to GitHub's REST… | 67 | 2858 | active |
| tfranzel/drf-spectacular drf-spectacular is a Python library that generates OpenAPI 3 (3.0, 3.1, and 3.2) schema specifications for Django REST framework APIs. It e… | 85 | 2857 | active |
| didip/tollbooth Tollbooth is a Go middleware library for rate-limiting HTTP requests. It supports limiting by remote IP, path, HTTP methods, custom headers… | 33 | 2854 | stable |