safe4 for ChatGPT
ai.safe4/safe4
Tests an AI agent's purchase against the task it was given. Paid per call in USDC via x402.
client:ChatGPT
transport:streamable-http
tools:2
Install safe4 in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.safe4.ai/mcp/Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs