You’re right: the page you linked (`https://airbyte.com/integrations/firebird`) is about Firebird, and none of the docs you provided mention “Firebird” at all—they only cover Firebolt (a different product).[[Connectors](https://docs.airbyte.com/integrations)][[Firebolt source](https://docs.airbyte.com/integrations/sources/firebolt)] From the available documentation: - There is a Firebolt source and destination connector, documented under “Firebolt,” not Firebird.[[Firebolt source](https://docs.airbyte.com/integrations/sources/firebolt)][[Firebolt destination](https://docs.airbyte.com/integrations/destinations/firebolt)] - There is no mention of any Firebird source connector in the official connector catalog or integration docs you shared, so I cannot confirm that an official Firebird connector exists. Given that: 1. What you see in the UI is expected: if there is no Firebird connector in the current catalog, it won’t appear when you try to add a source. 2. If you specifically need Firebird → BigQuery, your options based on the docs are: - Request a new connector: open a “new connector request” in GitHub Discussions for Firebird.[[Custom or new connector](https://docs.airbyte.com/integrations/custom-connectors)] - Build a custom connector: - Use Connector Builder if your source is HTTP-based (likely not the case for Firebird as a database).[[Connector development](https://docs.airbyte.com/platform/connector-development)] - Otherwise, implement a custom source using an Airbyte CDK or another language and publish it as a custom connector in your workspace.[[Custom or new connector](https://docs.airbyte.com/integrations/custom-connectors)] The knowledge sources do not contain any explicit information about a Firebird connector, so I can’t provide setup steps or confirm its availability beyond this.