Security guardrails for AI agent payments
Security guardrails for AI agent payments
A watchdog MCP that validates every agent payment request against all 9 security checks before it executes — catching policy violations, replay attacks, amount tampering, revoked tokens, and budget overruns at call time.
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Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| sentinel_audit_transaction | Run all 9 security checks; returns PASS/BLOCKED + SHA-256 audit hash |
| sentinel_revoke_token | Permanently revoke a token — all future audits with this token_id will BLOCK |
| sentinel_clear_nonce | Remove a nonce from the replay store (for legitimate refunds/retries only) |
| sentinel_verify_chain | Verify a sequence of audit hashes forms an unbroken chain |
| sentinel_threat_model | Simulate any named attack vector; returns severity, defence, and detection |
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