API Gateway GitHub Repositories (2026) · Open Source Tools

🦥 One gateway for your AI agents, APIs and MCP servers.

Self-hosted AI gateway for coding CLIs — one OpenAI/Claude/Gemini/Codex-compatible endpoint, with a multi-tenant web console, request logs, and spend quotas.

ESB, SOA, REST, APIs and Cloud Integrations in Python

Apache Syncope

MCP gateway for AI agents: turn any REST/OpenAPI, GraphQL, SOAP or SQL API into MCP tools. 547 ready-made connectors (SAP, ERP, e-commerce) with RBAC, SSO, audit logs and a knowledge graph.

Gravitee.io - OpenSource API Management

Microservices library - scalecube-services is a high throughput, low latency reactive microservices library built to scale. It features: API-Gateways, service-discovery, service-load-balancing, the architecture supports plug-and-play service communication modules and features. built to provide performance and low-latency real-time stream-processing

Based on the proxy gateway service of dubbo-go, it solves the problem that the external protocol calls the internal Dubbo cluster. At present, it supports HTTP and gRPC[developing].

A service proxy that provides API management capabilities using Google Service Infrastructure.

The official ngrok Kubernetes Operator

High-performance API and AI Gateway

A secure local gateway for AI agents to reliably call approved enterprise APIs, tools, and services.

Self-hosted execution layer for AI agents: connect any agent to real APIs, scope exactly what it can touch, and keep credentials out of the agent's hands.

Open source API management platform

Instant alarms and dashboards for Serverless, SAM, CDK and CloudFormation

A security-first reverse proxy built to guard the free web.

A privacy-focused AI chat platform built with Vite + Capacitor + Cloudflare. Runs locally or in the cloud, supports Gemini models, live web search, and intelligent key rotation. No sign-up required — fast, secure, and customizable.

Production-ready Codex-compatible account-pool gateway with seamless failover, full-session recovery, native quota headers, WebSocket/HTTP bridge, and observability.

Never hit rate limits again. One OpenAI-compatible endpoint for 60+ providers & 1,200+ models — smart auto-fallback, prompt compression, 60-language dashboard. Plug into Claude Code, Cursor, Codex & more. Free, open-source, self-hosted.

AI inference gateway and control plane for multi-provider routing, policies, caching, tools, and observability.