ProofCheck MCP

v0.1.0 changelog · 1

io.github.something-agent/proofcheck

Free x402 offer/receipt checker: verifies signatures and whether the signer fits the host.

transport:streamable-http tools:5

Target client

run in your project directory

claude mcp add --transport http proofcheck https://proofcheck.something-agent.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


                verify_offer

verify offer


                verify_receipt

verify receipt


                verify_payment_required

verify payment required


                preflight_x402_endpoint

preflight x402 endpoint


                lookup_erc8004_agent

Read-only

lookup erc8004 agent

All 5 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.