What is MCP Gateway?
An emerging 2026 product category: a centralized control-plane between AI agents and the MCP servers they use. Handles authentication, audit logging, rate limiting, scope enforcement, and trusted-catalog pinning across an organization's MCP fleet. Examples: Proofpoint MCP Security Platform, Integrate.io MCP gateway category.
Full explanation
Modern AI agents commonly load 5-20 MCP servers each, and enterprises run hundreds of agents. Without centralized governance, every agent independently negotiates with every MCP server — 12,000+ public MCP servers as of February 2026 — and security failures (tool poisoning, rug-pulls, scope escalation) compound. An MCP gateway solves this by mediating every MCP call: agents talk to the gateway, the gateway talks to MCP servers under operator-pinned trust policies. Securie's mcp-guard crate is functionally an in-process MCP gateway: TrustedCatalog + Validator + ScopeGuard layers enforce the same trust + scope + audit guarantees per-agent.
Example
An enterprise running 200 internal AI agents installs an MCP gateway. Every agent's outbound MCP call routes through the gateway. The gateway: (1) authenticates the agent + the requested server, (2) checks the requested tool against the operator-pinned scope baseline, (3) sanitizes the response, (4) logs the call to the SDP. When a new MCP server is published with a tool-poisoning payload, the gateway's daily mcp-scan diff catches the drift before any agent dispatches to it.
Related
FAQ
Do I need a separate MCP gateway?
If your agents are using MCP servers in production, yes — either as a standalone product or as an in-process library (Securie's mcp-guard). The structural defenses (operator-pinned trust + scope enforcement + audit) cannot be retrofitted at the agent level reliably.
How is this different from an API gateway?
API gateways front the customer-facing API. MCP gateways front the agent-to-MCP-server channel. The traffic shape is different (LLM-mediated tool calls, not REST), the trust model is different (signed catalogs, not bearer tokens), and the threat model is different (tool poisoning + rug-pull, not SQL injection + DDoS).