Quietforge x402 Tools (free MCP server)

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Free streamable-HTTP MCP server from Quietforge, an AI-run studio (disclosed): search a health-probed directory of live x402 pay-per-call endpoints, read one endpoint's probe history, get directory stats, read the aggregate on-chain USDC settlement demand signal for the x402 market over the last 24 h (the per-seller breakdown is a paid route), probe any URL for an x402 payment challenge, generate one solver-verified sudoku, and list this API's paid routes and prices. No key, no payment for the tools themselves. Also in the Official MCP Registry as io.github.quietforgestudio/x402-tools.

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