supabase / supabase

Open source Postgres development platform bundling a database with auth, auto-generated APIs, realtime, storage, and edge functions.

firecrawl / firecrawl

Hosted and open-source API that searches the web and converts pages, documents, and sites into LLM-ready markdown or structured JSON.

fastapi / fastapi

FastAPI is a Python web framework for building APIs using standard type hints, with automatic OpenAPI and JSON Schema documentation.

nautechsystems / nautilus_trader

Rust-native, event-driven engine for backtesting and live trading across multiple asset classes and venues, with Python strategy control.

lightpanda-io / browser

A headless browser written from scratch in Zig for AI agents and browser automation, not based on Chromium or WebKit.

googleworkspace / cli

Command-line tool for Google Workspace APIs (Drive, Gmail, Calendar, Sheets, Docs, Chat, Admin) with commands generated from Google's Discovery Service.

github / github-mcp-server

Official MCP server that lets AI tools read repositories, manage issues and pull requests, and query GitHub Actions and security data.

agentgateway / agentgateway

Open source proxy that routes and secures agent-to-LLM, agent-to-tool, and agent-to-agent traffic using MCP and A2A protocols.

bitwarden / server

Backend APIs, SQL Server database, and Docker deployment tooling for the Bitwarden password manager clients.

SimoneAvogadro / android-reverse-engineering-skill

Claude Code skill that decompiles Android APK/XAPK/JAR/AAR files and extracts the HTTP APIs an app uses.

larksuite / cli

Official command-line tool for Lark/Feishu covering Messenger, Docs, Base, Sheets, Calendar, Mail, Tasks and Meetings, usable by humans and AI agents.

gin-gonic / gin

Gin is a Go HTTP web framework with a Martini-like API built on httprouter for fast REST APIs and web services.

zitadel / zitadel

Open-source identity and access management platform providing SSO, MFA, passkeys, OIDC, SAML, and SCIM with multi-tenancy.

open-meteo / open-meteo

Open-source weather forecast API with free non-commercial access, no API key, and data from national weather services.

openssl / openssl

General-purpose toolkit implementing TLS, DTLS, and QUIC protocols on top of a standalone cryptographic library and CLI.

dicebear / dicebear

DiceBear is an open source library that generates deterministic SVG avatars from seed strings across 63 styles.

typesense / typesense

Typesense is an open-source, in-memory search engine with typo tolerance, faceting, geosearch, and vector search.

grokability / snipe-it

Web-based open source system for tracking IT assets, who has them, depreciation, and software license management.

Armur-Ai / Pentest-Swarm-AI

Autonomous API and web-app penetration testing tool that runs a swarm of AI agents to chain exploits and prove vulnerabilities.

juspay / hyperswitch

Open-source, self-hostable payments infrastructure in Rust that connects to many payment processors and offers routing, vault, and reconciliation modules.

flowable / flowable-engine

Java workflow engine that executes BPMN processes, CMMN cases, and DMN decision rules, embeddable or runnable as a server.

dotnet / aspnetcore

Cross-platform .NET framework for building cloud-connected web, IoT, and mobile backend applications.

PHPMailer / PHPMailer

A PHP library for composing and sending email with SMTP, attachments, HTML bodies, and address validation.

shlinkio / shlink

A self-hosted PHP URL shortener that serves shortened links under your own domain.

spree / spree

Open-source Ruby commerce platform with REST APIs, TypeScript SDKs, an admin dashboard, and a Next.js storefront.

hathach / tinyusb

Cross-platform USB host and device stack in C for embedded systems, with no dynamic allocation and interrupts deferred to task context.

apache / apisix

Apache APISIX is a dynamic, high-performance API gateway that also works as an AI gateway and Kubernetes ingress controller.

phoenixframework / phoenix

Phoenix is a web framework for Elixir for building HTTP APIs, server-rendered apps, and realtime features.

apache / couchdb

Apache CouchDB is a document database with multi-primary replication and a JSON-over-HTTP API.

danog / MadelineProto

Async PHP library implementing the Telegram MTProto protocol client API, for logging in as a user or bot without the Bot API.

apache / fineract

Open-source core banking platform providing a extensible foundation for financial services like loans, savings, and group lending.

supabase / realtime

Elixir/Phoenix WebSocket server providing Broadcast, Presence, and Postgres Changes for realtime client apps.

Alamofire / Alamofire

Swift library for HTTP networking built on URLSession, offering chainable requests, parameter encoding, and response validation.

Uniswap / v4-core

Core Solidity smart contracts for Uniswap v4, a singleton automated market maker with extensible pools and hooks.

gatling / gatling

Open-source load testing tool where performance test scenarios are written as code in Java, JavaScript, TypeScript, Kotlin, or Scala.

aws / aws-sdk-php

Official PHP SDK for accessing Amazon Web Services APIs such as S3, DynamoDB, and hundreds of other AWS services.

Vectorized / solady

Gas-optimized Solidity snippets and contract libraries for Ethereum, including ERC20, ERC721, and ERC1155 implementations.

mojolicious / mojo

Perl web framework with a built-in non-blocking HTTP/WebSocket server and client, plus MVC, routing, templates, and JSON/HTML parsing.

PostgREST / postgrest

Serves a RESTful JSON API directly from an existing PostgreSQL database, with authorization delegated to database roles.

kgrzybek / modular-monolith-with-ddd

Reference implementation of a modular monolith in .NET using Domain-Driven Design, CQRS, and clean architecture patterns.

DaveGamble / cJSON

Ultralightweight JSON parser and printer written in ANSI C, distributed as a single source file and header.