What is the API URL for an Airbyte installation, deployed via Helm on GCP? I don't have any URLs that I can make sense of to access the API.

Hmm, I don't know enough to give you a confident answer yet. The extracts provided do not contain specific information about the API URL for an Airbyte installation deployed via Helm on GCP. However, once Airbyte is deployed on your cluster, you should be able to access it using the link provided under the URL tab as mentioned in the [documentation](https://docs.airbyte.com/deploying-airbyte/on-restack). For more detailed information, I would recommend checking the [Airbyte documentation](https://docs.airbyte.com) or reaching out to the Airbyte community on [Slack](https://slack.airbyte.com/) for further assistance.