Tethered Trust for builders for ChatGPT

com.tetheredtrust/builders

Launch and keep agent tools working: MCP checks, registry publishing, x402 payment checks.

client:ChatGPT transport:streamable-http tools:12

Install Tethered Trust for builders in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://tetheredtrust.com/mcp/builders

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