PayStage for ChatGPT
io.github.base-buzz/mcp
Umbrella MCP: payment preflight, auth watch, HIP-3 trade preflight, velocity checks
client:ChatGPT
transport:streamable-http
runtime:npm
tools:9
Install PayStage in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.paystage.xyz/mcp
Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs