MCP Hangar

Self-hosted policy enforcement plane for MCP servers, blocking tool calls when a tool's behavior changes underneath.

Servicefreeglobal

MCP Hangar is a free, self-hosted policy enforcement plane for teams running a fleet of MCP servers, sitting on the call path to catch when a tool's description quietly changes underneath a cached client. It adds an access policy, attributable audit logs, and SIEM export, installable with one script.

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Problem & pain-point mapping
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