SchemaPin Protocol

What it does

SchemaPin: A simple, free and open-source security standard for signing and verifying AI agent tool schemas to prevent malicious tampering. Secure your MCP servers in minutes.

SchemaPin is an open-source security standard for signing and verifying AI agent tool schemas and skill folders. Prevent supply chain attacks on MCP servers with ECDSA P-256 signatures, DNS-anchored trust, and TOFU key pinning. SDKs for Python, JavaScript, Go, and Rust.

SchemaPin is an open standard for cryptographically pinning the tool schemas your AI agents read — so a tampered MCP server can't quietly redirect a payment, leak a secret, or rewrite its own contract. Five-minute install. ECDSA P-256. No central registry. $ schemapin verify ✓ fetched .well-known ✓ pinned ECDSA key ✓ 7 tools verified └ 0 errors signature size 64 bytes ecdsa p-256 / der runtime trust roots 0 · tofu only "An agent that trusts a schema is an agent that trusts a stranger." — open the box. § what we're stopping The agent reads a tool description and obeys. That's the attack surface. T-01 observed Description hijack A compromised MCP server rewrites a tool description…from schemapin.org

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