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Use OmniaKey in Cursor by enabling the OpenAI API key path, pasting your OmniaKey token, and setting the override base URL to https://api.omniakey.com/v1.

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Direct answer

In Cursor, open Settings → Models → API Keys:

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Step 1: Create an OmniaKey key

Open the API Keys dashboard, create a key named something like cursor-local, and copy it.

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Step 2: Configure Cursor

In Cursor’s model settings:
  1. Enable the OpenAI API key option.
  2. Paste your OmniaKey key.
  3. Enable Override Base URL.
  4. Set the base URL to https://api.omniakey.com/v1.

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Step 3: Add model ids

Use exact model ids from Models. Cursor can reach supported Claude, GPT, and Gemini models through the OpenAI-compatible endpoint. Examples:
  • claude-opus-4-8
  • gpt-5.5
  • gemini-3.1-pro-preview

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FAQ

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What base URL should Cursor use?

Use https://api.omniakey.com/v1.

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Can Cursor use Claude through an OpenAI-compatible endpoint?

Yes. OmniaKey maps supported Claude ids through the OpenAI-compatible Chat Completions endpoint, so Cursor can call Claude by model id.

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Should I use one key for every Cursor workspace?

You can, but separate keys per workspace are easier to revoke, cap, and audit.