Kong Gateway is the world's most popular open-source API gateway, built on NGINX and Lua, offering a plugin ecosystem for authentication, rate limiting, observability, and traffic management at any scale.

Gravitee.io is an open-source API management platform offering an API gateway, developer portal, and API analytics with support for REST, GraphQL, WebSocket, gRPC, and event-driven APIs.

Jentic is an AI infrastructure company building the agentic knowledge layer for APIs. Founded in late 2024 and backed by $4.5M in pre-seed funding, Jentic enables enterprises to confidently manage, scale, and govern AI agent initiatives in one unified platform built on open standards.

Toolhouse is a Backend-as-a-Service platform for building, deploying, and managing AI agents. Developers define agents as code and deploy them as APIs with a single command. Agents are automatically connected to over 40 pre-built tools including RAG, memory, code execution, browser automation, web scraping, and database connections.

Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration so you can create better APIs—faster.

A network index of all APIs.json files maintained by the API Evangelist organization, providing a comprehensive directory of API definitions across the network.

Composio is a unified API and tooling platform for AI agents with 1000+ pre-built connectors, managed OAuth, tool search, context management, and a sandboxed workbench to help you build AI agents that turn intent into action.

Traefik is a modern open-source HTTP reverse proxy and load balancer that makes deploying microservices and API gateways easy with automatic service discovery, Let's Encrypt integration, and a rich middleware ecosystem.

API and integration profile for Stackmint.

Barndoor AI is the control plane for agentic AI, providing secure access and governance for AI agents and Model Context Protocol (MCP) servers.