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mcp/harbor
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402MCP.org — HTTP 402 & Agent Payment Registry MCP

v1.1.1 changelog · 1

org.402mcp/registry

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

transport:streamable-http runtime:npm tools:7
View source Website

Target client

run in your project directory 

claude mcp add --transport http registry https://402mcp.org/api/v1/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

decode_402_challenge

decode 402 challenge

recommend_payment_rail

recommend payment rail

search_402_solutions Read-only

search 402 solutions

get_solution Read-only

get solution

get_scheme_reference Read-only

get scheme reference

probe_402_support

probe 402 support

get_best_payment_solution Read-only

get best payment solution

All 7 tools, one page each

2 prompts you invoke yourself

19 resources you attach as context

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.