1. Create a Google Service account.
2. Configure a Generative Language API Key in your Google Service Account.
3. Add a New Model in AI Agent Builder or in AI models of the ODC Portal, for a Custom Connection.
4. Configure the model name and key as you please.
5. In the Model endpoints, add an endpoint with the following information:
   1. Name: any name
   2. Endpoint URL: https://[Your ODC Stage]/GeminiConnector/rest/VertexAI/GenerateContent?method=[the gemini method you want to use]
   3. Status: Active
   4. Priority 1
   5. Headers:
      1. Name: APIKey
      2. Value: [the value of the Generative Language API Key]

In step 5.2, any gemini method listed here should work.

As an example, to use Gemini 2.5 Flash Preview 05-20, the URL should look as follows:

• https://[Your ODC Stage]/GeminiConnector/rest/VertexAI/GenerateContent?method=gemini-2.5-flash-preview-05-20