AI Engineering/Phase 13/Lesson 17

MCP Gateways and Registries — Enterprise Control Planes

Enterprises cannot let every dev install random MCP servers. A gateway centralizes auth, RBAC, audit, rate limiting, caching, and tool-poisoning detection, then exposes the merged tool surface as a single MCP endpoint. The Official MCP Registry (Anthropic + GitHub + PulseMCP + Microsoft, namespace-verified) is the canonical upstream. This lesson names where a gateway fits, walks a minimal implementation, and surveys the 2026 vendor landscape.

Learn 45 min Python (stdlib, minimal gateway)

Prerequisites: Phase 13 · 15 (tool poisoning), Phase 13 · 16 (OAuth 2.1)

#Learning Objectives

Explain where an MCP gateway sits (between MCP clients and multiple backend MCP servers).
Implement the five gateway responsibilities: auth, RBAC, audit, rate limit, policy.
Enforce a pinned-tool-hash manifest at the gateway layer.
Differentiate the Official MCP Registry from metaregistries (Glama, MCPMarket, MCP.so, Smithery, LobeHub).

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The text and code of this lesson are based on AI Engineering from Scratch by Rohit Ghumare, MIT licensed.