domain: apis
2838 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| picklepete/pyicloud PyiCloud is a Python library that lets developers authenticate with and query iCloud webservices, such as calendar and iPhone (Find My iPho… | 23 | 2842 | active |
| pseudomuto/protoc-gen-doc A protoc plugin that generates documentation (HTML, JSON, DocBook, Markdown) from comments in Protocol Buffers .proto files. It supports pr… | 65 | 2836 | active |
| kaitranntt/ccs CCS is a TypeScript CLI tool that manages multiple AI provider profiles and accounts for Claude Code and compatible CLIs, switching between… | 78 | 2833 | active |
| supercorp-ai/supergateway Supergateway is a CLI tool that runs MCP stdio-based servers over SSE, WebSockets, or Streamable HTTP, and vice versa, with a single comman… | 47 | 2821 | active |
| abhinavxd/libredesk Libredesk is an open-source, self-hosted omnichannel customer support desk shipped as a single Go binary with a Vue frontend. It unifies li… | 91 | 2819 | active |
| target/goalert GoAlert is an open-source on-call scheduling and alert escalation application that automatically notifies the right person via SMS, voice c… | 74 | 2819 | active |
| openstreetmap/openstreetmap-website The Ruby on Rails application that powers the OpenStreetMap website and its editing API. It provides user accounts, diary entries, messagin… | 77 | 2813 | stable |
| gruns/furl furl is a small Python library that makes parsing and modifying URLs easy, offering a fluent API over the tedious standard urllib/urlparse … | 53 | 2810 | stable |
| parse-community/Parse-SDK-iOS-OSX The official Apple SDK for the Parse Platform, providing client access to Parse Server from iOS, iPadOS, macOS, watchOS, and tvOS apps. It … | 84 | 2809 | active |
| engineer-man/piston Piston is a high performance general purpose code execution engine that safely runs untrusted and potentially malicious code in isolated en… | 66 | 2796 | active |
| FriendsOfSymfony/FOSRestBundle FOSRestBundle is a Symfony bundle providing tools for rapidly building RESTful APIs, including a format-agnostic view layer, Accept header … | 63 | 2795 | stable |
| samber/do samber/do is a dependency injection toolkit for Go 1.18+ built on generics, offering a type-safe, reflection-free API with no external depe… | 86 | 2794 | stable |
| http4k/http4k http4k is a lightweight, functional HTTP toolkit for Kotlin where applications are just functions from Request to Response, with no annotat… | 95 | 2783 | stable |
| pedestal/pedestal Pedestal is a set of Clojure libraries for building server-side services, APIs, and web applications on the JVM. It provides an interceptor… | 63 | 2779 | active |
| fuergaosi233/claude-code-proxy A Python proxy server that translates Claude API requests (/v1/messages) into OpenAI-compatible API calls, letting the Claude Code CLI work… | 50 | 2778 | active |
| websockets/wscat wscat is a command-line tool for connecting to WebSocket servers (or acting as a WebSocket server) and interactively sending and receiving … | 41 | 2772 | active |
| ascending-llc/jarvis-registry Jarvis Registry is an open-source, enterprise-grade MCP and A2A agent gateway and workflow orchestration platform that gives AI copilots an… | 84 | 2757 | active |
| mojolicious/mojo Mojolicious is a real-time web framework for Perl that supports MVC web applications, WebSockets, and non-blocking I/O with a built-in web … | 75 | 2747 | active |
| flawiddsouza/Restfox Restfox is an offline-first, minimalistic HTTP and WebSocket testing client available as a web app (PWA) and desktop application. It suppor… | 74 | 2746 | active |
| tidwall/sjson SJSON is a fast Go library for setting values in JSON documents using dot-syntax paths. It is the write-side companion to GJSON, which hand… | 70 | 2737 | stable |
| sparfenyuk/mcp-proxy A Python CLI tool that bridges MCP (Model Context Protocol) transports, converting between stdio and SSE/Streamable HTTP. It lets MCP clien… | 80 | 2729 | active |
| gavv/httpexpect httpexpect is a Go library providing concise, declarative end-to-end HTTP and REST API testing via chainable request builders and response/… | 47 | 2725 | stable |
| luckyframework/lucky Lucky is a full-featured web framework written in Crystal that emphasizes catching bugs at compile time through its type system. It include… | 80 | 2724 | active |
| yesodweb/yesod Yesod is a type-safe, RESTful web framework for Haskell built on the WAI interface, featuring compile-time-checked routing, templating, and… | 75 | 2723 | active |
| opentripplanner/OpenTripPlanner OpenTripPlanner is an open-source, server-side Java application for multi-modal trip planning, computing itineraries that combine public tr… | 82 | 2722 | stable |
| Vexa-ai/vexa Vexa is an open-source (Apache-2.0) meeting transcription API that dispatches bots to join Google Meet, Microsoft Teams, and Zoom calls and… | 87 | 2719 | active |
| devflowinc/trieve Trieve is an all-in-one API platform for semantic vector search, typo-tolerant full-text and neural search, recommendations, RAG, and analy… | 61 | 2717 | active |
| Kong/unirest-java Unirest is a lightweight, fluent HTTP client library for Java supporting HTTP/1 and HTTP/2, WebSockets, JSON mapping via Jackson or GSON, a… | 95 | 2702 | active |
| runtypes/runtypes Runtypes is a TypeScript library for runtime validation of data against static types using composable validators for primitives, objects, a… | 98 | 2697 | stable |
| facebook/fbthrift Facebook's evolved branch of Apache Thrift, providing a serialization and RPC framework with a rewritten compiler and a fully asynchronous … | 67 | 2697 | active |
| swagger-api/swagger-client Swagger Client is a JavaScript library for fetching, resolving, and executing requests against Swagger/OpenAPI-defined REST APIs from the b… | 98 | 2694 | active |
| litl/backoff A Python library providing function decorators for configurable backoff and retry logic. It supports both synchronous functions and asyncio… | 10 | 2694 | stable |
| palemoky/chinese-poetry-api A high-performance Go-based API service serving nearly 400,000 classical Chinese poems (Tang, Song, Yuan, etc.) with both REST and GraphQL … | 76 | 2690 | active |
| walkor/webman Webman is a high-performance PHP web framework built on Workerman that integrates HTTP, WebSocket, TCP, and UDP services. It uses resident … | 80 | 2688 | active |
| envoyproxy/ratelimit A Go/gRPC rate limiting service from the Envoy project that provides centralized, generic rate limiting for distributed applications. It st… | 67 | 2686 | active |
| jsonata-js/jsonata JSONata is a lightweight query and transformation language for JSON data, and this repository is its reference JavaScript implementation. I… | 96 | 2679 | stable |
| Suxiaoqinx/Netease_url A self-hosted Python service that parses Netease Cloud Music (网易云音乐) songs, playlists, and albums to retrieve direct download URLs at multi… | 73 | 2673 | active |
| krakend/krakend-ce KrakenD Community Edition is an open-source, stateless, high-performance API Gateway written in Go that aggregates, transforms, secures, an… | 99 | 2668 | stable |
| scalatra/scalatra Scalatra is a tiny, Sinatra-inspired web micro-framework for Scala that runs on the JVM. It lets developers build high-performance, asynchr… | 76 | 2650 | active |
| jeasonlzy/okhttp-OkGo OkGo is an Android network request library built on top of OkHttp, offering a simpler RESTful-style API than Retrofit. It supports RxJava/R… | 23 | 10560 | maintenance |
| http4s/http4s Http4s is a minimal, idiomatic Scala library for building HTTP servers and clients, serving as Scala's equivalent to Rack, WSGI, WAI, and S… | 93 | 2626 | stable |
| dgunning/edgartools EdgarTools is a Python library for accessing and parsing SEC EDGAR filings as structured, typed Python objects. It provides a clean API for… | 94 | 2624 | active |
| jgravelle/jcodemunch-mcp jCodeMunch is an MCP server that indexes codebases with tree-sitter AST parsing and serves symbol-level code retrieval to AI agents, cuttin… | 78 | 2624 | active |
| microsoft/vscode-pull-request-github A VS Code extension by Microsoft/GitHub that lets developers review and manage GitHub pull requests and issues directly inside the editor. … | 98 | 2619 | active |
| cloudwego/volo Volo is a high-performance, strongly extensible RPC framework written in Rust for building microservices. It provides Thrift, gRPC, and HTT… | 88 | 2619 | active |
| tus/tus-js-client tus-js-client is a pure JavaScript client library for the tus resumable upload protocol, an HTTP-based protocol for interruptible, resumabl… | 78 | 2618 | stable |
| ory/fosite Fosite is a security-first, extensible OAuth 2.0 and OpenID Connect SDK for Go, implementing RFC 6749, RFC 6819, PKCE, and OpenID Connect C… | 58 | 2612 | active |
| hayes/pothos Pothos is a plugin-based GraphQL schema builder for TypeScript that uses a strongly typed, code-first approach with no code generation requ… | 95 | 2611 | active |
| aws/aws-sdk-java-v2 The official AWS SDK for Java, version 2, enabling Java applications to interact with Amazon Web Services such as S3, EC2, and DynamoDB. It… | 95 | 2610 | stable |
| firecamp-dev/firecamp Firecamp is an open-source, developer-first API development platform for designing, testing, and documenting REST, GraphQL, WebSocket, and … | 52 | 2607 | active |
| fawazahmed0/exchange-api A free currency exchange rates API serving 200+ currencies, including cryptocurrencies and metals, with daily updates and no rate limits. D… | 69 | 2602 | active |
| versatica/JsSIP JsSIP is a pure JavaScript SIP (Session Initiation Protocol) library that implements a full SIP user agent for browsers and Node.js. It sup… | 69 | 2599 | stable |
| stephenh/ts-proto ts-proto is a protoc plugin that generates idiomatic, strongly-typed TypeScript code from protobuf schema files, including encode/decode me… | 98 | 2590 | active |
| HTTPlug HTTPlug is an HTTP client abstraction for PHP built on PSR-7 messages, defining synchronous and asynchronous client interfaces. It lets lib… | 48 | 2590 | stable |
| keikaavousi/fake-store-api FakeStoreAPI is a free hosted REST API that serves pseudo-real e-commerce JSON data including products, carts, users, and JWT login tokens.… | 32 | 2585 | stable |
| WeChatPadPro/WeChatPadPro WeChatPadPro is a self-hostable WeChat management and automation service built on the unofficial WeChat Pad protocol, written in Go. It exp… | 67 | 2575 | active |
| facet-rs/facet Facet is a Rust reflection ecosystem: a single derive macro gives types a runtime SHAPE description (fields, variants, attributes, layout) … | 82 | 2570 | active |
| Azure/azure-sdk-for-java The official Azure SDK for Java, providing client and management libraries for consuming and administering Azure services. It follows the A… | 95 | 2565 | active |
| http-kit/http-kit http-kit is a minimalist, high-performance, event-driven HTTP client and server for Clojure, fully Ring-compatible as a drop-in replacement… | 68 | 2565 | stable |
| sparrowapp-dev/sparrow-app Sparrow is an open-source, AI-powered desktop and web application for API testing, debugging, documentation, and team collaboration, positi… | 79 | 2554 | active |
| Autobahn Autobahn|Python is an open-source library implementing the WebSocket protocol and the Web Application Messaging Protocol (WAMP) for Python … | 94 | 2543 | active |
| circe/circe circe is a JSON library for Scala and Scala.js providing a JSON AST, encoders/decoders (codecs), and automatic derivation for case classes … | 90 | 2542 | stable |
| 3lvis/SwiftSync SwiftSync is a Swift library that syncs JSON API payloads into local SwiftData models and exports them back to JSON. It provides convention… | 75 | 2541 | active |
| symfony/serializer The Symfony Serializer component transforms data structures, including object graphs, into array structures or formats like XML and JSON, a… | 95 | 2536 | stable |
| RestKit/RestKit RestKit is an Objective-C framework for building RESTful web service clients on iOS and OS X. It provides an object mapping engine integrat… | 23 | 10094 | maintenance |
| golang/protobuf The legacy Go module providing bindings for Google's protocol buffers, including binary, text, and JSON serialization of protobuf messages.… | 23 | 10085 | maintenance |
| alerta/alerta Alerta is a monitoring system that consolidates and de-duplicates alerts from multiple monitoring sources into a single view, combining a J… | 75 | 2528 | active |
| bestruirui/octopus Octopus is a self-hosted LLM API aggregation gateway that unifies multiple provider channels behind a single endpoint, converting between O… | 79 | 2527 | active |
| chrisryugj/korean-law-mcp An MCP server and CLI that exposes Korea's Ministry of Government Legislation (법제처) open APIs — statutes, precedents, ordinances, treaties,… | 82 | 2521 | active |
| microsoft/CsWin32 A C# source generator that emits strongly-typed P/Invoke and COM interop bindings for Win32 APIs from .winmd metadata. It generates friendl… | 96 | 2518 | active |
| mitmproxy/pdoc pdoc is a zero-configuration documentation generator that auto-generates API documentation for Python projects from docstrings and type ann… | 73 | 2510 | active |
| SpectoLabs/hoverfly Hoverfly is a lightweight open-source API simulation and service virtualization tool written in Go. It captures HTTP/HTTPS traffic and repl… | 99 | 2509 | active |
| Squidex/squidex Squidex is an open-source (MIT) headless CMS and content management hub built with ASP.NET Core and CQRS, exposing content and assets throu… | 88 | 2509 | active |
| pagekit/vue-resource vue-resource is an HTTP client plugin for Vue.js that provides services for making web requests via XMLHttpRequest or JSONP. It supports th… | 10 | 9981 | maintenance |
| Apipie/apipie-rails Apipie-rails is a DSL and Rails engine for documenting RESTful APIs in Ruby on Rails applications. It lets developers describe API endpoint… | 80 | 2507 | stable |
| disease-sh/API disease.sh is a free, open-source REST API serving JSON statistics on COVID-19, Influenza, and other disease outbreaks, aggregating data fr… | 62 | 2503 | active |
| capnproto/capnproto-rust A Rust implementation of the Cap'n Proto data serialization format and RPC protocol. It generates code from schema files enabling zero-copy… | 76 | 2497 | active |
| php-fig/link php-fig/link provides the PSR-13 standard interfaces for representing hyperlinks and link providers in PHP. It contains only interface defi… | 32 | 2492 | stable |
| maxmind/GeoIP2-php A PHP library providing a client for MaxMind's GeoIP2 and GeoLite web services and a reader for their MMDB-format geolocation databases. It… | 86 | 2490 | stable |
| theoephraim/node-google-spreadsheet A popular JavaScript/TypeScript wrapper library for the Google Sheets API (v4). It provides cell-based and row-based read/write operations,… | 89 | 2489 | active |
| CJackHwang/AIstudioProxyAPI A self-hosted proxy server that exposes Google AI Studio's web chat interface as an OpenAI-compatible API using FastAPI and Camoufox/Playwr… | 70 | 2489 | active |
| senchalabs/connect Connect is an extensible HTTP server framework for Node.js built around a stack of 'plugins' known as middleware. It provides a minimal cor… | 32 | 9881 | maintenance |
| aurora-develop/aurora A Go service that exposes ChatGPT Web capabilities as an OpenAI-compatible API, including chat completions, responses, file Q&A, image gene… | 90 | 2485 | active |
| mercurius-js/mercurius Mercurius is a GraphQL adapter for the Fastify web framework for Node.js, providing query parsing/validation caching, JIT execution, subscr… | 93 | 2484 | stable |
| ash-project/ash Ash is a declarative, extensible application framework for Elixir that lets you model your domain as typed resources and derive APIs, persi… | 95 | 2480 | active |
| trailofbits/graphtage Graphtage is a command-line utility and Python library for semantically diffing and merging tree-structured files like JSON, YAML, XML, HTM… | 66 | 2478 | stable |
| python-gitlab/python-gitlab python-gitlab is a Python package providing access to the GitLab v4 REST API and GraphQL API, including a CLI tool wrapping REST endpoints.… | 98 | 2472 | stable |
| Google APIs PHP Client The official Google APIs client library for PHP, enabling server-side access to Google APIs such as Gmail, Drive, and YouTube. It is comple… | 88 | 9806 | maintenance |
| confluentinc/schema-registry Confluent Schema Registry is a Java-based serving layer that stores and retrieves Avro, JSON Schema, and Protobuf schemas via a RESTful API… | 77 | 2462 | active |
| stoplightio/elements Stoplight Elements is an open-source set of React and Web Components for building beautiful, interactive API documentation from OpenAPI doc… | 67 | 2453 | active |
| JMESPath JMESPath is a declarative query language for extracting and transforming elements from JSON documents, with a formal specification and comp… | 67 | 2451 | stable |
| CarterCommunity/Carter Carter is a thin framework layer of extension methods over ASP.NET Core that makes building HTTP APIs more explicit and enjoyable. It adds … | 73 | 2446 | active |
| lihengming/spring-boot-api-project-seed A Spring Boot and MyBatis based seed/boilerplate project for quickly building small-to-medium RESTful API projects in Java. It provides bes… | 23 | 9692 | maintenance |
| apidoc/apidoc apiDoc is a Node.js CLI tool that generates RESTful web API documentation from inline @api annotations in source code comments. It supports… | 10 | 9656 | maintenance |
| rubygems/rubygems.org RubyGems.org is the Ruby community's central gem hosting service, a Rails application that lets developers publish, search, and install Rub… | 77 | 2437 | active |
| saloonphp/saloon Saloon is a PHP library for rapidly building third-party API integrations and SDKs using Connector and Request classes. It is framework-agn… | 80 | 2436 | active |
| perwendel/spark Spark is a tiny, expressive web framework for Java 8+ (with a Kotlin DSL) inspired by Sinatra, letting you define routes with lambdas in a … | 32 | 9644 | maintenance |
| Firebase Admin SDK for PHP An unofficial Firebase Admin SDK for PHP that provides access to Firebase services like Authentication, Realtime Database, Firestore, and C… | 98 | 2435 | active |
| agentclientprotocol/claude-agent-acp An ACP (Agent Client Protocol) adapter that exposes the Claude Agent SDK to any ACP-compatible client. It bridges protocol features like to… | 80 | 2431 | active |
| open-webui/pipelines Pipelines is a UI-agnostic, OpenAI API-compatible plugin framework for adding custom Python logic and workflows to any client that speaks t… | 41 | 2428 | active |