API Gateway

An mcp rest api bridge works by reading your API’s OpenAPI spec at runtime and translating each operation into an MCP tool. You keep the REST API exactly as it is, add a proxy or gateway in front of it, and point your agent at the MCP endpoint. Nothing in the backend is rewritten or redeployed. That is the short answer, and it is genuinely accurate — with one important caveat that the marketing pages bury. “No code changes” describes the API, not the project. You still own a configuration surface, an authentication decision, and a curation judgment call. The teams that get burned are the ones who treat auto-conversion as the finished deliverable instead of step one. ...

The best MCP gateway for most enterprise teams in 2026 is Composio (for managed, fast time-to-value), Bifrost (for self-hosted, lowest-latency performance), or Kong AI Gateway (if you already run Kong). Choosing depends on whether you want managed SaaS, open-source control, or existing infrastructure reuse. What Is an MCP Gateway and Why Does Every Enterprise AI Stack Need One in 2026? An MCP gateway is a centralized proxy layer that sits between AI agents and the tools they call via the Model Context Protocol (MCP) — enforcing authentication, rate limiting, audit logging, and access control across all agent-to-tool interactions. Without a gateway, every agent connects directly to every tool, which means credentials scattered across configs, no centralized audit trail, and zero enforcement of who can call what. The MCP ecosystem has grown to 97 million monthly SDK downloads and 16,000+ active MCP servers as of early 2026, and Gartner projects 75% of API gateway vendors will embed MCP features by end of year. Remote MCP servers are up nearly 4x since May 2025, and 86% of enterprises report needing technology upgrades to deploy AI agents safely. An MCP gateway solves this by giving you one governed entry point — the “zero trust layer” for enterprise AI. Without one, scaling beyond a handful of agents becomes an operational and security liability. ...