m2m.monster (Devnet sandbox) for ChatGPT

monster.m2m/m2m-monster

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

client:ChatGPT transport:streamable-http tools:10

Install m2m.monster (Devnet sandbox) in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://sandbox.m2m.monster/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs