Open Router API key failing

Support Help
2

Hey, thanks for the report. Cursor doesn’t officially support the OpenRouter provider.

This is a known issue. When you use the “Override OpenAI Base URL” option with OpenRouter, Cursor sends malformed requests that are missing required fields.

Current workarounds:

  1. Direct OpenAI (easiest): disable the “Override OpenAI Base URL” toggle and use OpenAI directly instead of OpenRouter.
  2. LiteLLM proxy (advanced): set up an intermediary proxy server as described here: Workaround to get Openrouter models working in Cursor

The team understands this is blocking users and is working on proper support for custom OpenAI-compatible endpoints. I’ll add your report to the existing ticket.

Let me know if any of these workarounds help in the meantime!