blackwall x402 guardrail for Claude Code

com.blackwalltier/blackwall-x402-guardrail

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

client:Claude Code transport:streamable-http tools:1

Install blackwall x402 guardrail in Claude Code

run in your project directory

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

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs