domain: apis
2838 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| LibreTranslate/LibreTranslate LibreTranslate is a free and open source machine translation API that is fully self-hosted and offline capable, powered by the Argos Transl… | 95 | 16136 | stable |
| scalar/scalar Scalar is an open-source API platform centered on rendering beautiful interactive API references from OpenAPI/Swagger documents, with a bui… | 90 | 16000 | active |
| rjsf-team/react-jsonschema-form A React component library that declaratively builds and validates web forms from JSON Schema. It supports multiple UI themes (MUI, Bootstra… | 99 | 15876 | stable |
| encode/httpx HTTPX is a fully featured HTTP client library for Python 3 with sync and async APIs, HTTP/1.1 and HTTP/2 support, and a requests-compatible… | 67 | 15439 | stable |
| Moya/Moya Moya is a Swift network abstraction layer that encapsulates Alamofire calls behind typed, enum-based API endpoints. It provides compile-tim… | 64 | 15358 | stable |
| feathersjs/feathers Feathers is a full-stack framework for building web APIs and real-time applications in TypeScript or JavaScript. It provides a service-orie… | 98 | 15267 | stable |
| sindresorhus/got Got is a human-friendly and powerful HTTP request library for Node.js, offering JSON mode, retries, pagination, hooks, and stream support. … | 94 | 14937 | stable |
| languagetool-org/languagetool LanguageTool is an open-source proofreading engine that checks grammar, spelling, and style in 25+ languages. It ships as a Java library, a… | 77 | 14875 | stable |
| zitadel/zitadel ZITADEL is an open-source identity and access management (IAM) platform providing authentication and authorization out of the box, includin… | 95 | 14864 | active |
| ajv-validator/ajv Ajv is the fastest JSON Schema validator for JavaScript, compiling declarative schemas into optimized validation functions. It supports JSO… | 81 | 14813 | stable |
| hapijs/hapi @hapi/hapi is a mature Node.js web framework for building HTTP servers and APIs with secure defaults, a rich plugin system, and zero extern… | 67 | 14793 | stable |
| ktorio/ktor Ktor is an asynchronous web framework for Kotlin, built by JetBrains on top of coroutines, for creating servers, microservices, and multipl… | 98 | 14504 | stable |
| drogonframework/drogon Drogon is a C++14/17/20-based HTTP web application framework for building high-performance web application servers. It uses non-blocking I/… | 89 | 14217 | active |
| Netflix/zuul Zuul is Netflix's L7 application gateway service providing dynamic routing, monitoring, resiliency, and security for microservices. It is a… | 93 | 14063 | active |
| OpenResty OpenResty is a full-fledged web platform that bundles an enhanced Nginx core, LuaJIT, and many Nginx modules and Lua libraries into a singl… | 82 | 14012 | stable |
| apollographql/apollo-server Apollo Server is a spec-compliant, production-ready GraphQL server library for Node.js that supports schema-first development. It integrate… | 93 | 13947 | stable |
| quicktype quicktype is a code generation tool that produces strongly-typed models and serializers from JSON samples, JSON Schema, TypeScript, and Gra… | 97 | 13843 | active |
| metersphere/metersphere MeterSphere is an open-source continuous testing platform with a built-in AI assistant for generating test cases. It combines test case man… | 98 | 13470 | active |
| HackerNews/API Official documentation and samples for the Hacker News public API, hosted on Firebase. It describes how to access HN items (stories, commen… | 32 | 13276 | stable |
| rmyndharis/OpenWA OpenWA is a free, MIT-licensed, self-hosted WhatsApp API Gateway that wraps WhatsApp connections in a REST API with webhooks, a React dashb… | 78 | 13227 | active |
| Cap'n Proto Cap'n Proto is an extremely fast binary data interchange format and capability-based RPC system, designed so data can be read directly from… | 77 | 13169 | stable |
| nock/nock Nock is an HTTP server mocking and expectations library for Node.js. It intercepts HTTP requests made by code under test and returns predef… | 96 | 13121 | stable |
| ShishirPatil/gorilla Gorilla is a UC Berkeley research project for training and evaluating LLMs to make function/tool calls, including the OpenFunctions fine-tu… | 54 | 13006 | active |
| swag Swag converts Go source code annotations into Swagger 2.0 (OpenAPI) documentation, with a CLI generator and integrations for popular Go web… | 78 | 12994 | stable |
| graphile/crystal Graphile's Crystal monorepo containing Grafast, a planning and execution engine for GraphQL.js, and PostGraphile, which auto-generates high… | 94 | 12929 | active |
| cfug/dio dio is a powerful HTTP client library for Dart and Flutter supporting global configuration, interceptors, FormData, request cancellation, t… | 98 | 12839 | stable |
| Portkey-AI/gateway Portkey AI Gateway is an open-source, TypeScript-based AI gateway that routes requests to 1,600+ LLMs across many providers through a singl… | 76 | 12837 | active |
| fullstorydev/grpcurl grpcurl is a command-line tool for invoking RPC methods on gRPC servers, accepting JSON input and converting it to binary protobuf encoding… | 70 | 12788 | active |
| Play Framework Play Framework is a high-velocity, reactive web framework for Java and Scala running on the JVM. It offers a stateless, non-blocking archit… | 94 | 12621 | active |
| Kludex/starlette Starlette is a lightweight, production-ready ASGI framework and toolkit for building async web services in Python. It provides HTTP and Web… | 98 | 12571 | stable |
| sinatra/sinatra Sinatra is a Ruby DSL for quickly creating web applications with minimal effort, built on Rack. It provides routing, filters, sessions, and… | 74 | 12452 | stable |
| grpc/grpc-rust Tonic is a Rust implementation of gRPC over HTTP/2, providing async/await client and server support built on hyper and tokio, with prost-ba… | 94 | 12449 | stable |
| darrenburns/posting Posting is a terminal-based (TUI) HTTP client for testing and working with REST APIs, similar to Postman or Insomnia but keyboard-centric. … | 72 | 12322 | active |
| Slim Framework Slim is a PHP micro-framework for quickly writing simple yet powerful web applications and APIs. It provides a fast HTTP router, concentric… | 90 | 12279 | active |
| expressjs/multer Multer is Node.js middleware for handling multipart/form-data, primarily used for file uploads, built on top of busboy. It integrates with … | 92 | 12084 | stable |
| LonamiWebs/Telethon Telethon is a pure Python 3 asyncio MTProto library for interacting with Telegram's full API, either as a user account or a bot, serving as… | 10 | 12059 | active |
| seanmonstar/reqwest Reqwest is an ergonomic, batteries-included HTTP client library for Rust built on hyper. It supports async and blocking clients, JSON/multi… | 93 | 11800 | stable |
| go-resty/resty Resty is a simple HTTP, REST, and SSE client library for Go with a fluent API. It provides middleware, retries with backoff, circuit breaki… | 93 | 11767 | active |
| PipedreamHQ/pipedream Pipedream is a hosted integration platform for developers to connect APIs and build event-driven automations using pre-built components plu… | 77 | 11651 | active |
| NangoHQ/nango Nango is an open-source integration platform for building product integrations with 900+ pre-built API providers. It handles OAuth/API-key … | 94 | 11610 | active |
| bufbuild/buf Buf is a modern CLI toolchain for Protocol Buffers that replaces protoc with a fast compiler plus linting, formatting, breaking-change dete… | 97 | 11389 | active |
| JamesNK/Newtonsoft.Json Json.NET (Newtonsoft.Json) is the most popular high-performance JSON framework for .NET, providing serialization, LINQ to JSON, JSON Path q… | 69 | 11315 | stable |
| google/go-github go-github is a Go client library for accessing the GitHub REST API v3, maintained by Google. It provides typed services for repositories, i… | 98 | 11286 | stable |
| tweepy/tweepy Tweepy is an open-source Python library for accessing the Twitter/X API. It wraps the API's endpoints in user-friendly Python functions, su… | 81 | 11175 | active |
| chimurai/http-proxy-middleware A Node.js middleware library for proxying HTTP requests, wrapping the httpxy proxy engine in a simple one-liner API. It integrates with con… | 96 | 11134 | stable |
| BrasilAPI/BrasilAPI BrasilAPI is a free public REST API that centralizes Brazilian public data (CEP postal codes, and other government-adjacent data) behind mo… | 77 | 11055 | active |
| apache/thrift Apache Thrift is a lightweight, language-independent software stack for point-to-point RPC, combining an interface definition language, a c… | 86 | 10953 | stable |
| Kludex/uvicorn Uvicorn is a lightning-fast ASGI web server implementation for Python, supporting HTTP/1.1 and WebSockets. It serves async Python framework… | 99 | 10927 | stable |
| r-spacex/SpaceX-API An open-source REST API serving SpaceX launch, rocket, core, capsule, Starlink, launchpad, and landing pad data, hosted publicly at api.spa… | 10 | 10914 | active |
| WhiskeySockets/Baileys Baileys is a WebSocket-based TypeScript/JavaScript library that interacts with the WhatsApp Web API directly, without a browser or Selenium… | 98 | 10867 | active |
| TykTechnologies/tyk Tyk Gateway is a cloud-native, open-source API Gateway written in Go that supports REST, GraphQL, TCP, and gRPC protocols. It provides rate… | 97 | 10805 | stable |
| serde-rs/serde Serde is Rust's standard serialization and deserialization framework, built on the trait system with compile-time derive macros instead of … | 97 | 10784 | stable |
| 99designs/gqlgen gqlgen is a Go library for building GraphQL servers using a schema-first approach with code generation. It generates type-safe resolvers an… | 97 | 10753 | stable |
| asciimoo/wuzz Wuzz is an interactive terminal-based tool for inspecting and modifying HTTP requests and responses, with cURL-compatible command line argu… | 66 | 10722 | active |
| restify/node-restify Restify is a Node.js web service framework optimized for building semantically correct RESTful APIs, using connect-style middleware and Sin… | 88 | 10686 | stable |
| StockSharp/StockSharp StockSharp (S#) is an open-source algorithmic and quantitative trading platform for .NET and Python, providing a trading API, 70+ broker/ex… | 67 | 10645 | active |
| protobufjs/protobuf.js A high-performance, conformant JavaScript/TypeScript implementation of Protocol Buffers that works with .proto schemas without requiring pr… | 95 | 10583 | active |
| corsairdev/corsair Corsair is an open-source TypeScript integration layer that lets applications and AI agents connect to 200+ third-party services (GitHub, S… | 59 | 10554 | active |
| getlago/lago Lago is an open-source metering and usage-based billing platform that ingests usage events, manages subscriptions and pricing, and generate… | 95 | 10411 | active |
| w7corp/easywechat EasyWeChat is a popular PHP SDK for integrating with WeChat (Weixin) platform APIs, including Official Accounts, Mini Programs, Pay, and Op… | 98 | 10368 | active |
| seanmonstar/warp warp is a composable web server framework for Rust built on hyper and Tokio. It uses a Filter system to combine path routing, header/query … | 77 | 10365 | stable |
| graphql-go/graphql graphql-go/graphql is a Go implementation of the GraphQL specification, following the official graphql-js reference implementation. It supp… | 62 | 10142 | stable |
| go-swagger/go-swagger A Go implementation of the Swagger 2.0 (OpenAPI 2.0) specification with a CLI tool for working with swagger specs. It generates servers, cl… | 99 | 10006 | active |
| Grape Grape is an opinionated Ruby framework for building REST-like APIs, running on Rack or alongside Rails and Sinatra. It provides a simple DS… | 77 | 10003 | active |
| boto3 Boto3 is the official Amazon Web Services SDK for Python, providing idiomatic Python APIs for AWS services such as S3, EC2, and DynamoDB. I… | 67 | 9883 | stable |
| restsharp/RestSharp RestSharp is a lightweight REST and HTTP API client library for .NET, built as a wrapper around HttpClient. It adds convenient parameter ha… | 73 | 9824 | stable |
| OpenFeign/feign Feign is a Java library that simplifies writing HTTP clients by binding annotated interfaces to templatized HTTP requests. It supports plug… | 99 | 9796 | stable |
| falconry/falcon Falcon is a minimalist ASGI/WSGI web framework for Python focused on building high-performance REST APIs and microservices. It embraces the… | 90 | 9795 | stable |
| hiteshchoudhary/apihub FreeAPI is an open-source hub of free, production-style REST APIs (auth, e-commerce, social media, todos, and more) for practicing API inte… | 56 | 9706 | active |
| probot/probot Probot is a Node.js/TypeScript framework for building GitHub Apps that respond to webhook events and automate repository workflows. It prov… | 92 | 9595 | stable |
| alufers/mitmproxy2swagger A CLI tool that converts mitmproxy traffic captures (and HAR files) into OpenAPI 3.0 / Swagger specifications. It lets you reverse-engineer… | 83 | 9594 | active |
| bytedance/sonic Sonic is a high-performance JSON serialization and deserialization library for Go, accelerated by JIT compilation and SIMD instructions. It… | 99 | 9589 | active |
| reactiveui/refit Refit is a type-safe REST client library for .NET that turns REST APIs into live C# interfaces, generating HttpClient-based implementations… | 99 | 9561 | active |
| flowable/flowable-engine Flowable is an open-source Java workflow and Business Process Management (BPM) platform providing fast BPMN process, CMMN case, and DMN rul… | 79 | 9493 | stable |
| swagger-api/swagger-editor Swagger Editor is a browser-based and embeddable editor for authoring OpenAPI and Swagger API specifications in YAML/JSON. It is available … | 95 | 9461 | active |
| json-path/JsonPath Jayway JsonPath is a Java library providing a DSL for reading and querying JSON documents using JsonPath expressions, analogous to XPath fo… | 67 | 9448 | stable |
| evolution-foundation/evolution-api Evolution API is an open-source REST API for WhatsApp and multi-channel messaging, supporting both the Baileys-based WhatsApp Web API and t… | 79 | 9430 | active |
| yagop/node-telegram-bot-api A runtime-agnostic TypeScript client library for the Telegram Bot API, supporting Node.js, Bun, Deno, Cloudflare Workers, and Vercel Functi… | 99 | 9203 | active |
| higress-group/higress Higress is a CNCF Sandbox, cloud-native AI-native API gateway built on Istio and Envoy, extensible with Wasm plugins written in Go, Rust, o… | 98 | 9196 | active |
| GetBindu/Bindu Bindu is an open-source Python framework that provides the identity, communication, and payments layer for AI agents, implementing the A2A … | 82 | 9180 | active |
| API Platform API Platform is a full-stack PHP framework built on Symfony (and Laravel) for creating API-first projects with hypermedia REST or GraphQL A… | 95 | 9179 | stable |
| vitalik/django-ninja Django Ninja is a web framework for building REST APIs with Django using Python type hints, powered by Pydantic for validation and serializ… | 99 | 9175 | stable |
| Model Context Protocol A collection of reference implementations of Model Context Protocol (MCP) servers maintained by the MCP steering group, demonstrating how t… | 84 | 9065 | active |
| mark3labs/mcp-go A Go SDK implementing the Model Context Protocol (MCP), letting developers build MCP servers that expose tools, resources, and prompts to L… | 83 | 9035 | active |
| teamhanko/hanko Hanko is an open-source authentication and user management platform built in Go, offering passwords, passkeys (WebAuthn/FIDO2), MFA, OAuth … | 94 | 9015 | active |
| urql-graphql/urql urql is a highly customizable and versatile GraphQL client for JavaScript applications, with first-class support for React, Preact, Vue, So… | 95 | 8967 | active |
| karatelabs/karate Karate is an open-source Java-based test automation framework that unifies API testing (REST, GraphQL, SOAP, WebSocket), UI browser automat… | 99 | 8929 | active |
| JeffreySu/WeiXinMPSDK Senparc.Weixin is a comprehensive C# SDK for all WeChat platforms, covering Official Accounts, Mini Programs, Mini Games, WeChat Pay, WeCom… | 97 | 8890 | active |
| node-fetch/node-fetch A light-weight module that brings the WHATWG Fetch API to Node.js, providing a spec-compliant fetch() with promise-based requests and strea… | 60 | 8856 | stable |
| apache/shenyu Apache ShenYu is a Java-native, asynchronous, high-performance API gateway for service proxying, protocol conversion, and API governance ac… | 88 | 8820 | stable |
| bottlepy/bottle Bottle is a fast, lightweight WSGI micro web-framework for Python distributed as a single file module with no dependencies beyond the stand… | 72 | 8779 | stable |
| appleboy/gorush Gorush is a push notification micro server written in Go using the Gin framework. It exposes a REST API and CLI for sending notifications t… | 91 | 8761 | active |
| ThreeMammals/Ocelot Ocelot is a .NET API gateway built as a series of ASP.NET Core middlewares, providing a unified entry point for microservices architectures… | 98 | 8716 | active |
| justlovemaki/AIClient2API AIClient2API is a self-hosted Node.js proxy that simulates client-only LLM service requests (Antigravity, Codex, Grok, Kiro, Gemini CLI, et… | 81 | 8697 | active |
| OwO-Network/DLX DLX (formerly DeepLX) is a self-hosted translation API server written in Go that exposes a simple HTTP API on port 1188 for machine transla… | 97 | 8683 | active |
| oatpp/oatpp Oat++ is a light, zero-dependency C++ web framework for building highly scalable and resource-efficient web applications and REST APIs. It … | 46 | 8646 | active |
| symfony/http-foundation A Symfony component that defines an object-oriented layer for the HTTP specification, replacing PHP's global variables and functions with R… | 95 | 8625 | stable |
| dropwizard/dropwizard Dropwizard is a Java framework that bundles stable libraries (Jetty, Jersey, Jackson, Logback, Metrics, JDBI/Hibernate, Liquibase) into an … | 95 | 8577 | stable |
| oapi-codegen/oapi-codegen oapi-codegen is a command-line tool and Go library that generates Go server boilerplate, API clients, and HTTP models from OpenAPI 3.0/3.1 … | 93 | 8534 | active |
| graphql-hive/graphql-yoga GraphQL Yoga is a batteries-included, spec-compliant GraphQL over HTTP server library for JavaScript/TypeScript, built on Envelop and Graph… | 98 | 8527 | stable |