Official MCP RegistryHosted servermcp.blackwalltier.com
Blackwall X402 Guardrail
Gives a pre-signature x402 payment verdict (GO/HOLD/STOP) for AI agents, with a verifiable signed receipt.
Connect to Claude Code
Copyclaude mcp add --transport http blackwall-x402-guardrail https://mcp.blackwalltier.comVendor-hosted remote server: nothing to install locally. If it uses OAuth, Claude opens the vendor login on first use.
Endpoints
- https://mcp.blackwalltier.comstreamable-http
Published in the official MCP registry as “Blackwall X402 Guardrail”. Verified through the vendor namespace.