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Connect to ChatGPT

ChatGPT supports MCP servers directly (announced April 2025). Use the same endpoint as Claude.

Setup​

In ChatGPT settings, add an MCP server:

  • URL: https://ascend-gateway-v5.ascendgtm.workers.dev/mcp
  • Transport: Streamable HTTP

ChatGPT will handle OAuth DCR and token exchange automatically, just like Claude.

Authentication​

On first connection, ChatGPT redirects you to the gateway's authorization page. Enter your tenant bearer token to authenticate.

Differences from Claude​

  • Same 19 tools available
  • Same response format
  • ChatGPT may present tool results differently in the UI
  • Response trimming (fields, format) works the same way