greymatter-mcp is an open-source CLI tool that provides an MCP server for integrating with the ReliaQuest GreyMatter GraphQL API. It is designed for developers building security and observability integrations.
In the Other infrastructure space, greymatter-mcp takes a focused approach. It focuses on enabling integration and management of the ReliaQuest GreyMatter platform via MCP server and GraphQL API. It is built as an open-source project for security platform developers and integrators. greymatter-mcp is open source under the MIT license. The product ships for the command line, and it can be self-hosted.
It is developed by Space-C0wboy, and the product first shipped in 2026. Development happens publicly on GitHub with 43 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — greymatter-mcp occupies a relatively distinct niche. Key capabilities include MCP server, GraphQL API integration, and security tooling. It exposes integrations via an MCP server.
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