Best API Gateways & Backends GitHub Repositories

Kubernetes metrics-related API types and clients

SDKs for CoinAPI & FinFeedAPI

A configuration editing tool and API

A Java library for communicating with the Twilio REST API and generating TwiML.

Codex CLI multi-account OAuth manager with account switching, health checks, runtime rotation, diagnostics, and recovery tools for @openai/codex

GeoNetwork is a catalog application to manage spatially referenced resources. It provides powerful metadata editing and search functions as well as an interactive web map viewer. It is currently used in numerous Spatial Data Infrastructure initiatives across the world.

Everest - Celeste Mod Loader / Mod API

Local codebase intelligence CLI + MCP server for AI coding agents: SQLite code graph, 28 languages, 287 commands, 246 MCP tools, change-safety gates, audit evidence, zero API keys.

Self-hosted Enterprise and Personal AI + agent runtime in .NET (NativeAOT-friendly)

A next generation Python CMake adaptor and Python API for plugins

Customer-run client for Secure MCP Tunnel: connect private or localhost MCP servers to ChatGPT, Codex, the Responses API, and AgentKit without exposing them to the public internet.

Generate OpenAPI schema from RSpec request specs

A native .NET LLM inference engine and agent runtime for GGUF models. TensorSharp provides a console application, a web-based chatbot interface, iPhone App, and Ollama/OpenAI-compatible HTTP APIs for programmatic access. It supports Windows/MacOS/iOS/Linux with full GPU capability

A RAG app to ask questions about rows in a database table. Deployable on Azure Container Apps with PostgreSQL Flexible Server.

Ruby library to access flickr api.

lunar.dev: Agent native MCP Gateway for governance and security

LINE Messaging API SDK for Ruby

Modern Jira REST API client for JavaScript & TypeScript — Jira Cloud API v2/v3, Agile & Service Desk. Type-safe, tree-shakable, works in Node.js and browsers (ESM/CJS).

PyAthena is a Python DB API 2.0 (PEP 249) client for Amazon Athena.

Flamingock brings Change-as-Code (CaC) to your entire stack. It applies versioned, auditable changes to the external systems your application depends on — such as schemas, message brokers, databases, APIs, cloud services, and any other external system your application needs.