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mcp/harbor
Verified official

x402 Precheck MCP

v1.0.0

dev.workers.w0arvg81zlgf.x402-precheck/precheck

Check an x402 payment challenge before your agent pays: network, USDC, amount, payTo, facilitator.

transport:streamable-http tools:1
Website

Target client

run in your project directory 

claude mcp add --transport http precheck https://x402-precheck.w0arvg81zlgf.workers.dev/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

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

x402_precheck

x402 precheck

All 1 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.