Add Assay — MCP policy firewall with replayable evidence trail

[Rul1an]

Hi! I'd like to suggest adding Assay to your security tools listing.

What it is: An open-source MCP policy enforcement proxy that sits between agents and MCP servers. Every tool call gets an explicit ALLOW/DENY with a replayable evidence trail.

Why it's relevant for MCP security:

• Covers 7/10 OWASP MCP Top 10 risks (mapping)
• MCP08 (Lack of Audit and Telemetry) is the primary value prop
• Tested with 12 security experiment vectors, 0 false positives (results)
• Deterministic — same input, same decision, every time
• Evidence bundles you can verify, diff, and replay

Quick start:

cargo install assay-cli
assay mcp wrap --policy policy.yaml -- your-mcp-server

MIT licensed. No hosted backend required.

GitHub: https://github.com/Rul1an/assay