x402 Doctor for Claude.ai

com.twelvepermissions/x402-doctor

Diagnose x402 seller endpoints: what is wrong with your 402 challenge, and how to fix it.

client:Claude.ai transport:streamable-http tools:3

Install x402 Doctor in Claude.ai

Settings → Connectors → Add custom connector

https://x402-doctor.tsharpe.workers.dev/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

probe_x402_endpoint
explain_defect
list_checks

x402 Doctor in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

x402 Doctor MCP server