Assay is an open-source MCP policy enforcement proxy (Rust, MIT).
Runtime tool-call firewall with evidence bundles:
- ALLOW/DENY every tool call
- Replayable evidence (export, verify, diff)
- 7/10 OWASP MCP Top 10
- Compliance packs (EU AI Act, SOC2)
GitHub: https://github.com/Rul1an/assay
Assay is an open-source MCP policy enforcement proxy (Rust, MIT).
Runtime tool-call firewall with evidence bundles:
GitHub: https://github.com/Rul1an/assay