Blackwall X402 Guardrail

com.blackwalltier/blackwall-x402-guardrail

Pre-signature x402 payment verdict (GO/HOLD/STOP) for AI agents, with a verifiable signed receipt.

healthy

status

tools exposed

2745ms

connect latency

79d4d3cca502

schema fingerprint

Tools (1)

forecast_payment

Pre-signature x402 payment verdict: GO / HOLD / STOP for paying a counterparty, from settlement reputation, price-anomaly (quoted vs the payee's own median), and OFAC sanctions — with a third-party-verifiable Ed25519 signed receipt. Verdict only; never takes custody. Free under $10 at risk; over tha

Endpoint

https://mcp.blackwalltier.com
Category: Payments · Last checked: 2026-08-15T09:00:41Z

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How we measure →

What this means. This server responded to the MCP handshake and listed its tools without authentication. The schema fingerprint lets us flag if tool signatures silently change (schema drift) between checks.