Using Bitbucket Agentic Pipelines with Claude provider routed to Google Cloud Vertex AI (no Anthropi

[CAIO JUNIO GOUVEA]

Our organization is a public institution and cannot establish a direct contract with Anthropic to obtain an API key. However, we already have an active Google Cloud Platform contract and a Service Account with access to Vertex AI.

We are trying to use Bitbucket Agentic Pipelines with provider: claude, routing all Claude Code calls to Vertex AI instead of the Anthropic API directly. The approach is to set the following environment variables via config.overrides.env in the agent definition:

• CLAUDE_CODE_USE_VERTEX: "1" — to redirect Claude Code to Vertex AI
• ANTHROPIC_VERTEX_PROJECT_ID — pointing to our GCP project
• CLOUD_ML_REGION — set to us-east5
• GOOGLE_APPLICATION_CREDENTIALS — pointing to a temporary file written from a secured repository variable containing our Service Account JSON key

The Atlassian support team confirmed that these variables set in config.overrides.env should route calls to Vertex AI and are not blocked by Bitbucket's security filters.

Questions:

1. Is this approach officially supported by Agentic Pipelines?
2. Has anyone successfully used this setup in production?
3. Are there any known limitations or gotchas when authenticating via Service Account key file with this setup?

Any experience or guidance would be greatly appreciated. Thanks!