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mcp/harbor
Verified official

m2m.monster (Devnet sandbox) MCP

v1.0.0

monster.m2m/m2m-monster

Non-custodial x402 payments between AI agents on Solana. Returns unsigned transactions.

transport:streamable-http tools:10
Website

Target client

run in your project directory 

claude mcp add --transport http m2m-monster https://sandbox.m2m.monster/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

get_pricing Read-only

get pricing

quote_payment

quote payment

build_payment

build payment

verify_payment

verify payment

submit_payment

submit payment

verify_receipt

verify receipt

build_refund

build refund

register_agent

register agent

get_referral_status Read-only

get referral status

get_status Read-only

get status

All 10 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.