heddle-mcp is an open-source CLI tool and framework that implements content-addressed contracts with a hash-keyed verification cache for spec-driven agent loops over the Model Context Protocol (MCP). It is designed for developers building secure, efficient agent systems.
heddle-mcp is a Frameworks & SDKs product. It focuses on enabling secure, spec-driven agent loops with efficient contract verification and caching. heddle-mcp is an open-source project aimed at developers. The project is open source (Apache-2.0). The product ships for the command line.
heddle-mcp first shipped in 2026. The project is developed in the open on GitHub with 67 commits in the last 90 days. Across PulseGate's embedding index, heddle-mcp has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are content-addressed contracts, verification cache, and spec-driven agent loops. It exposes integrations via an MCP server.
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