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MCP Gateway (Tool Federation & Governance)(MCPG)
A single governed MCP entrypoint that sits in front of many backend MCP servers as a reverse proxy, federating their tools into one curated, managed tool surface that the agent connects to. Every tool call routes through the gateway, which enforces centralized authentication, per-tool authorization that separates the caller's identity from the downstream server's permissions, policy checks, rate limiting, audit logging, and telemetry. This turns a sprawling pile of independently deployed servers into one controlled integration contract, so tools can be curated, versioned, and revoked without touching each agent. Distinct from `control-plane`: the control plane is the general pattern of exposing one interface while routing internally to any tool, service, or model, whereas the MCP gateway is the MCP-ecosystem-specific realization focused on federating many MCP servers and governing the shared tool-access surface.
In 30 seconds
- What
- Single reverse proxy sits in front of many MCP servers, federating their tools into one curated surface with centralized auth, per-tool authorization, rate limiting, and audit logging.
- When to use
- Multiple independent MCP servers need unified access control, tool curation, and audit trails without modifying each agent or backend.
- Watch out
- Gateway becomes a critical bottleneck and single point of failure; any outage blocks all tool access across all agents and servers.
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MCP Gateway (Tool Federation & Governance): Overview
A single governed MCP entrypoint that sits in front of many backend MCP servers as a reverse proxy, federating their tools into one curated, managed tool surface that the agent connects to. Every tool call routes through the gateway, which enforces centralized authentication, per-tool authorization that separates the caller's identity from the downstream server's permissions, policy checks, rate limiting, audit logging, and telemetry. This turns a sprawling pile of independently deployed servers into one controlled integration contract, so tools can be curated, versioned, and revoked without touching each agent. Distinct from `control-plane`: the control plane is the general pattern of exposing one interface while routing internally to any tool, service, or model, whereas the MCP gateway is the MCP-ecosystem-specific realization focused on federating many MCP servers and governing the shared tool-access surface.
- Reverse proxy in front of many backend MCP servers
- Federates their tools into one curated, managed tool surface
- Centralized authentication at a single entrypoint
- Per-tool authorization separating caller identity from downstream permissions
- Policy enforcement, rate limiting, and request shaping per call
- Full audit log and telemetry for every tool invocation
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References
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