domain: apis
2838 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| CoderMJLee/MJExtension MJExtension is a lightweight Objective-C framework for converting between JSON/dictionaries and model objects without requiring models to i… | 23 | 8493 | stable |
| litestar-org/litestar Litestar is a production-ready, highly performant, extensible ASGI API framework for Python, formerly known as Starlite. It provides REST A… | 91 | 8419 | active |
| ogx-ai/ogx OGX (formerly Llama Stack) is an open-source, OpenAI-compatible agentic API server and Python library that bundles inference, vector stores… | 86 | 8416 | active |
| mockoon/mockoon Mockoon is a free, open-source desktop application (built with Electron) for designing and running mock REST APIs locally, with a companion… | 94 | 8379 | active |
| javalin/javalin Javalin is a lightweight, simple web framework for Java and Kotlin built on top of Jetty, supporting REST APIs, WebSockets, static file ser… | 98 | 8340 | active |
| openapi-ts/openapi-typescript A monorepo of tools for consuming OpenAPI schemas in TypeScript, centered on openapi-typescript which converts OpenAPI 3.0/3.1 specs into s… | 85 | 8333 | stable |
| openclaw/gogcli gog is a single Go binary CLI that provides terminal access to Google Workspace services including Gmail, Calendar, Drive, Docs, Sheets, Sl… | 83 | 8330 | active |
| smallnest/rpcx rpcx is a high-performance distributed RPC framework for Go, comparable to Alibaba Dubbo but designed natively for Go without requiring pro… | 77 | 8312 | active |
| Graphene Graphene is a code-first Python library for building GraphQL schemas and APIs, with built-in Relay support and integrations for Django, SQL… | 52 | 8239 | stable |
| apache/tomcat Apache Tomcat is an open-source servlet container implementing the Jakarta Servlet, Pages, Expression Language, WebSocket, Annotations, and… | 77 | 8234 | stable |
| ijl/orjson orjson is a fast, correct JSON serialization/deserialization library for Python, implemented in Rust via PyO3. It natively serializes datac… | 98 | 8214 | stable |
| curlconverter/curlconverter A tool that transpiles curl commands into equivalent code in Python, JavaScript, Go, and 27+ other languages or formats like HTTPie and HAR… | 58 | 8170 | active |
| APIs-guru/graphql-voyager GraphQL Voyager is a React component and standalone bundle that renders any GraphQL API schema as an interactive graph, powered by introspe… | 59 | 8160 | active |
| jdepoix/youtube-transcript-api A Python library and CLI that retrieves transcripts and subtitles for YouTube videos, including auto-generated captions, with subtitle tran… | 81 | 8116 | active |
| symfony/http-kernel The Symfony HttpKernel component provides a structured, event-driven process for converting an HTTP Request into a Response. It is the core… | 95 | 8106 | stable |
| MichalLytek/type-graphql TypeGraphQL is a TypeScript framework for building GraphQL APIs using classes and decorators instead of SDL files, generating the schema fr… | 87 | 8091 | active |
| facebook/facebook-ios-sdk The official Facebook SDK for iOS and tvOS, enabling integration of Facebook Platform features into Apple apps. It provides Facebook Login,… | 87 | 8090 | active |
| fonoster/fonoster Fonoster is an open-source programmable telecommunications stack (a Twilio alternative) for building voice and messaging applications, with… | 99 | 8080 | active |
| ducaale/xh xh is a fast, friendly command-line tool for sending HTTP requests, written in Rust. It reimplements HTTPie's design with a focus on improv… | 94 | 8041 | active |
| Project-OSRM/osrm-backend OSRM is a high-performance C++ routing engine built on OpenStreetMap data, exposing services via HTTP API, C++ library, and Node.js wrapper… | 98 | 8013 | active |
| hotheadhacker/no-as-a-service No-as-a-Service is a lightweight Express.js REST API that returns a random, witty rejection reason as JSON. It is hosted publicly and can a… | 56 | 7925 | stable |
| Octokit Octokit is the official, batteries-included JavaScript/TypeScript SDK for the GitHub platform APIs, integrating REST API client, GraphQL qu… | 83 | 7837 | stable |
| PyGithub/PyGithub PyGithub is a Python library providing typed, object-oriented access to the full GitHub REST API v3. It lets Python applications manage Git… | 95 | 7765 | active |
| nodejs/undici Undici is a fast HTTP/1.1 client library for Node.js, written from scratch, that also provides WHATWG-compliant fetch, WebSocket, EventSour… | 94 | 7682 | stable |
| symfony/routing The Symfony Routing component maps HTTP requests to configuration variables, matching incoming URLs against defined routes and generating U… | 99 | 7613 | stable |
| maximhq/bifrost Bifrost is a high-performance, open-source AI gateway written in Go that unifies access to 23+ LLM providers (OpenAI, Anthropic, AWS Bedroc… | 83 | 7587 | active |
| chenyme/grok2api A self-hosted multi-account API gateway for Grok Build, Grok Web, and Grok Console, written in Go with a React frontend. It exposes Grok ca… | 84 | 7538 | active |
| swagger-api/swagger-core Swagger Core is a Java library that implements the OpenAPI Specification, generating OpenAPI 3.x definitions from JAX-RS (javax and jakarta… | 99 | 7531 | stable |
| ninenines/cowboy Cowboy is a small, fast, modern HTTP server for Erlang/OTP supporting HTTP/1.1, HTTP/2, HTTP/3, Websocket, and REST. It provides a complete… | 77 | 7525 | stable |
| msgpack/msgpack MessagePack is an efficient binary object serialization format, like JSON but faster and more compact. This repository hosts the format spe… | 32 | 7494 | stable |
| libcpr/cpr cpr (C++ Requests) is a modern C++ HTTP client library that wraps libcurl with a simple, Python Requests-inspired API. It supports GET/POST… | 83 | 7417 | active |
| sparckles/Robyn Robyn is a high-performance async Python web framework with a Rust runtime, offering routing, middleware, WebSockets, templating, authentic… | 96 | 7377 | active |
| RicoSuter/NSwag NSwag is a Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, ASP.NET Core, and TypeScript, written in C#. It generates OpenAPI specifications… | 83 | 7358 | active |
| wiremock/wiremock WireMock is a popular open-source tool for mocking HTTP-based APIs, runnable as an embedded Java library, standalone server, or container. … | 80 | 7348 | stable |
| devlikeapro/waha WAHA is a self-hosted WhatsApp HTTP API that wraps multiple community engines (WEBJS, NOWEB, GOWS) behind a unified REST API and webhook in… | 94 | 7266 | active |
| postmanlabs/newman Newman is a command-line collection runner for Postman that executes Postman collections directly from the terminal. It is extensible with … | 75 | 7245 | stable |
| marshmallow-code/marshmallow marshmallow is a lightweight, framework-agnostic Python library for converting complex objects to and from native Python datatypes using de… | 77 | 7242 | stable |
| sammchardy/python-binance An unofficial Python wrapper for the Binance exchange REST API v3, covering general, market data, and account endpoints with asyncio and we… | 89 | 7205 | active |
| modelcontextprotocol/registry A community-driven registry service for Model Context Protocol (MCP) servers, acting like an app store where MCP clients can discover serve… | 86 | 7192 | active |
| rest-assured/rest-assured REST Assured is a Java DSL for testing and validating REST APIs with a fluent, dynamic-language-style syntax. It supports request specifica… | 74 | 7138 | active |
| ianstormtaylor/superstruct Superstruct is a JavaScript and TypeScript library for defining data schemas (structs) and validating arbitrary data against them at runtim… | 23 | 7134 | stable |
| dotnetcore/CAP CAP is a .NET library providing a lightweight event bus and a distributed transaction solution based on the Outbox pattern (local message t… | 92 | 7107 | active |
| php-fig/http-message PSR-7 provides a set of common PHP interfaces for representing HTTP messages (requests and responses) as described in RFC 7230/7231, plus U… | 23 | 7033 | stable |
| sinclairzx81/typebox TypeBox is a TypeScript library for building JSON Schema objects that also infer as static TypeScript types. It provides a unified runtime … | 77 | 6929 | stable |
| gcanti/io-ts io-ts is a TypeScript library providing a runtime type system for decoding and encoding data at IO boundaries. Codecs combine static types … | 23 | 6808 | stable |
| apache/openwhisk Apache OpenWhisk is an open source distributed serverless (FaaS) cloud platform that executes functions in response to events at any scale … | 67 | 6794 | active |
| luraproject/lura Lura is an open-source Go framework for building ultra-performant API Gateways and proxies, formerly known as the KrakenD framework. It agg… | 83 | 6792 | stable |
| requestly/requestly Requestly API Client is a lightweight, Git-native desktop API client for designing, building, and testing REST, GraphQL, SOAP, and gRPC API… | 91 | 6750 | active |
| webhooksite/webhook.site Webhook.site is a tool that instantly generates unique URLs and email addresses to receive, inspect, and debug HTTP webhooks and requests i… | 65 | 6717 | active |
| subzeroid/instagrapi instagrapi is a fast Python wrapper for Instagram's unofficial private (mobile) and public web APIs, supporting login with 2FA, session per… | 95 | 6713 | active |
| reqable/reqable-app Reqable is a cross-platform API debugging and testing application combining an MITM proxy for capturing HTTP(S) traffic with a full-feature… | 93 | 6683 | active |
| thephpleague/oauth2-server A standards-compliant OAuth 2.0 authorization server library for PHP, supporting all major grants (authorization code, client credentials, … | 87 | 6662 | stable |
| davidteather/TikTok-Api An unofficial Python API wrapper for TikTok.com that retrieves trending content, user information, hashtags, and video data without authent… | 92 | 6593 | active |
| BlockRunAI/ClawRouter ClawRouter is an open-source TypeScript LLM router built for autonomous AI agents, offering 71 models from OpenAI, Anthropic, Google, xAI, … | 78 | 6571 | active |
| x402-foundation/x402 x402 is an open standard and SDK suite for internet-native payments built on the HTTP 402 status code, letting servers charge for API or co… | 65 | 6543 | active |
| Flagsmith/flagsmith Flagsmith is an open-source feature flagging and remote configuration service that lets teams toggle features on and off, segment users, an… | 95 | 6530 | active |
| facebook/facebook-android-sdk The official Facebook SDK for Android, providing modular libraries to integrate Facebook Platform features into Android apps. It includes m… | 88 | 6456 | active |
| orval-labs/orval Orval is a code generation tool that produces type-safe TypeScript API clients from OpenAPI v3 or Swagger v2 specifications in YAML or JSON… | 95 | 6396 | active |
| joelittlejohn/jsonschema2pojo jsonschema2pojo generates Java types (POJOs) from JSON Schema or example JSON documents, annotating them for data-binding with Jackson 2.x/… | 80 | 6381 | active |
| apache/camel Apache Camel is an open-source integration framework offering 350+ connectors for databases, APIs, message brokers, and cloud services, wit… | 77 | 6300 | stable |
| tbphp/gpt-load GPT-Load is a high-performance, enterprise-grade AI API transparent proxy service built in Go that aggregates multiple AI providers (OpenAI… | 83 | 6290 | active |
| cue-lang/cue CUE is an open-source data validation language and inference engine for defining, generating, and validating text-based and dynamic configu… | 97 | 6241 | active |
| express-validator/express-validator express-validator is an Express.js middleware wrapping the validator.js library for request validation and sanitization. It lets you declar… | 82 | 6236 | stable |
| auth0/java-jwt A Java library for creating and verifying JSON Web Tokens (JWT) per RFC 7519, supporting HMAC, RSA, and ECDSA signing algorithms. It is mai… | 92 | 6235 | active |
| graphql-java/graphql-java GraphQL Java is the standard JVM implementation of the GraphQL specification, providing schema parsing, schema generation, and query execut… | 95 | 6223 | stable |
| aws/aws-sdk-php The official AWS SDK for PHP (version 3), providing idiomatic PHP client APIs for over 400 Amazon Web Services including S3, DynamoDB, EC2,… | 95 | 6203 | stable |
| expressjs/cors A Node.js middleware for Express and Connect that sets CORS response headers, telling browsers which origins may read responses from your s… | 70 | 6191 | stable |
| jinzhu/copier A Go library that copies values between structs, slices, and maps using reflection and matching field names. It supports struct tags to enf… | 65 | 6175 | stable |
| open-meteo/open-meteo Open-Meteo is an open-source weather API service that aggregates numerical weather prediction models from 15+ national weather services int… | 67 | 6093 | active |
| goadesign/goa Goa is a design-first framework for building APIs and microservices in Go. You define your API in a Go-based DSL and it generates server co… | 99 | 6089 | active |
| graphql-editor/graphql-editor GraphQL Editor is an open-source visual editor and IDE for designing, exploring, and documenting GraphQL schemas using a node-based visual … | 51 | 6066 | active |
| Huachao/vscode-restclient A Visual Studio Code extension that lets you send HTTP requests and view responses directly in the editor, supporting GraphQL queries, cURL… | 58 | 6045 | active |
| Azure/azure-sdk-for-net The official Azure SDK for .NET, containing client and management libraries for all Azure services, developed in the open. It provides cons… | 95 | 6042 | active |
| vuejs/apollo Vue Apollo is the official Apollo/GraphQL integration for Vue.js, providing composables and components for running GraphQL queries, mutatio… | 84 | 6032 | active |
| postmanlabs/postman-app-support Postman is a widely used API platform for building, testing, designing, and collaborating on APIs, offered as a desktop app and web service… | 64 | 6015 | active |
| FastEndpoints/FastEndpoints FastEndpoints is a lightweight REST API development framework for ASP.NET 8 and newer that serves as a developer-friendly alternative to Mi… | 95 | 5999 | active |
| graphql-dotnet/graphql-dotnet A .NET implementation of the GraphQL query language, providing a lexer/parser, schema definition, and execution engine for building GraphQL… | 99 | 5992 | active |
| YMFE/yapi YApi is a self-hostable, visual API management platform for defining, documenting, mocking, and testing HTTP interfaces across developers, … | 23 | 27723 | maintenance |
| bwmarrin/discordgo DiscordGo is a Go package providing low-level bindings to the Discord API, with nearly complete support for REST endpoints, the websocket g… | 53 | 5974 | active |
| graphql-rust/juniper Juniper is a GraphQL server library for Rust that enables building type-safe, fast GraphQL servers. It provides schema declaration and reso… | 86 | 5971 | active |
| lostisland/faraday Faraday is a Ruby HTTP client library that provides a common interface over multiple HTTP backends such as Net::HTTP, Typhoeus, and Patron.… | 95 | 5950 | stable |
| Kotlin/kotlinx.serialization Kotlin multiplatform serialization library consisting of a compiler plugin and runtime that generates serialization code for @Serializable … | 88 | 5943 | stable |
| fullstorydev/grpcui grpcui is a command-line tool that launches an interactive browser-based web UI for invoking and testing gRPC services, similar to Postman … | 85 | 5921 | active |
| ankitpokhrel/jira-cli JiraCLI is a feature-rich interactive command line tool for Atlassian Jira, inspired by the GitHub CLI. It lets users search, navigate, cre… | 71 | 5918 | active |
| golang/oauth2 The official Go client implementation of the OAuth 2.0 specification, maintained by the Go team. It provides token acquisition, refresh, an… | 77 | 5896 | stable |
| jnunemaker/httparty HTTParty is a popular Ruby library that makes HTTP requests easy and pleasant, supporting GET/POST and other verbs with convenient response… | 87 | 5895 | stable |
| smogon/pokemon-showdown Pokémon Showdown is a Pokémon battle simulator that runs as a website, a self-hostable game server, and a JavaScript library for simulating… | 87 | 5858 | active |
| microsoft/typespec TypeSpec is a Microsoft-built, extensible DSL and toolchain for defining cloud service APIs and data shapes as a single source of truth. It… | 94 | 5832 | active |
| OpenAI PHP OpenAI PHP is a community-maintained PHP SDK for interacting with the OpenAI API, covering chat, responses, embeddings, audio, images, fine… | 97 | 5829 | active |
| snailyp/gemini-balance A Python FastAPI proxy and load-balancing service for the Google Gemini API that rotates multiple API keys and exposes both Gemini and Open… | 41 | 5826 | active |
| google/clasp Clasp is a command-line tool for developing and managing Google Apps Script projects locally from the terminal. It lets you create, clone, … | 98 | 5803 | active |
| sooperset/mcp-atlassian A Model Context Protocol (MCP) server that connects AI assistants like Claude Desktop and Cursor to Atlassian Jira and Confluence, supporti… | 84 | 5797 | active |
| Klavis-AI/klavis Klavis AI is an open-source MCP (Model Context Protocol) integration platform that lets AI agents connect to 100+ prebuilt tool integration… | 65 | 5793 | active |
| ChilliCream/graphql-platform ChilliCream GraphQL Platform is a suite of open-source .NET tools for building GraphQL APIs, including the Hot Chocolate GraphQL server, th… | 98 | 5753 | active |
| littlecodersh/ItChat ItChat is a Python library providing a complete API for WeChat personal accounts, enabling bots and automation with under thirty lines of c… | 23 | 26469 | maintenance |
| letsencrypt/boulder Boulder is the Go implementation of an ACME-based certificate authority that powers Let's Encrypt. It automates domain validation and issua… | 95 | 5742 | active |
| TencentBlueKing/bk-cmdb BlueKing CMDB is an enterprise-grade configuration management database (CMDB) platform for managing IT assets, applications, and business t… | 77 | 5742 | active |
| go-pay/gopay GoPay is an aggregated payment SDK for Go that wraps WeChat Pay, Alipay, Douyin Pay, PayPal, Apple Pay, QQ Pay, Allinpay, Lakala, CMB, and … | 99 | 5731 | active |
| vikiboss/60s A collection of free, open-source REST APIs delivering daily news digests, Chinese social media trending lists (Weibo, Bilibili, Douyin, Zh… | 92 | 5678 | active |
| kgateway-dev/kgateway kgateway is a Kubernetes-native API gateway and ingress controller that implements the Kubernetes Gateway API as a control plane for Envoy … | 95 | 5670 | stable |