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Quietforge x402 Tools
io.github.quietforgestudio/x402-tools in the official MCP registry.
Endpoint https://qf-api.quietforge-studio.workers.dev/mcp. Source: github.com/quietforgestudio/qf-mcp-server.
The registry describes it as: Free tools: x402 endpoint directory + probe, on-chain x402 demand signal, sudoku, API pricing.
We read its 7 tools on 2026-10-26. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
x402_search x402_service x402_index_stats x402_demand x402_probe sudoku_puzzle quietforge_pricing
Run this server? Show the check in your README
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[](https://lazaretto.dev/mcp-registry/io-github-quietforgestudio-x402-tools)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
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