blackwall-x402-guardrail

com.blackwalltier/blackwall-x402-guardrailVersion 0.1.2

Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.

Status

Responds131 msNov 14, 2026, 13:49 UTCAnswered our handshake without sign-in.

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Data from the official MCP Registry, checked by run.zero. How we check

Streamable HTTP

https://mcp.blackwalltier.com/Responds131 msNov 14, 2026, 13:49 UTC

No sign-in

claude mcp add --transport http blackwall-x402-guardrail https://mcp.blackwalltier.com/

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Settings > Connectors > Add custom connector
Name: blackwall-x402-guardrail
Remote MCP server URL: https://mcp.blackwalltier.com/

{
  "mcpServers": {
    "blackwall-x402-guardrail": {
      "url": "https://mcp.blackwalltier.com/"
    }
  }
}

code --add-mcp '{"name":"blackwall-x402-guardrail","type":"http","url":"https://mcp.blackwalltier.com/"}'

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1 tools

Tools of blackwall-x402-guardrail
	Description		Read-only	Idempotent	Open world
`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 that, returns an x402 payment challenge.	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 that, returns an x402 payment challenge.	Not declared	Not declared	Not declared	Not declared

Registry status: Active
Published: Aug 25, 2026
Updated: Aug 25, 2026
Website: https://blackwalltier.com/⁠ (opens in a new tab)
Repository: https://github.com/bluetieroperations-create/blackwall-x402-mcp⁠ (opens in a new tab)
Categories (suggested): Invoicing and accounting Documents Data and analyticsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared