Pincer-MCP - Stop AI Agents From Reading Their Own Credentials
Pincer-MCP is a security-hardened Model Context Protocol gateway that implements proxy token architecture to prevent AI agents from seeing real API keys. Agents receive ephemeral proxy tokens (pxr_xxx) while Pincer stores encrypted credentials in the OS keychain (macOS Keychain, Windows Credential Manager, GNOME Keyring) and performs just-in-time decryption during API calls, immediately scrubbing keys from memory afterward. Includes tamper-evident audit logging with SHA-256 chain hashing and fine-grained per-agent, per-tool authorization.
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