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The interactions interface is incompatible with the Vertex AI Express mode

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
48/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Quiet
Tech stack
google-cloud, python
Domain
api, cloud

Research direction

Reproduce the interactions interface with Vertex AI Express mode and API-key authentication, then inspect the client initializer and resource-path construction described in the report. Done means the Express-mode configuration reaches the required project/location-based Vertex AI interactions path instead of the default Gemini Developer API path that returns 404.

Written by the indexing model from the issue text.

Description

api: vertex-ai

The interactions (NextGen) interface is incompatible with the Vertex AI Express mode (API Key authentication).

When using Express mode, the client initializer enforces a mutual exclusion between the API key and the project/location parameters. Because the project and location are missing, the SDK fails to construct the required Vertex AI resource path (/v1beta1/projects/{project}/locations/{location}/interactions). Instead, it falls back to a default path (/v1beta1/interactions) on the Gemini Developer API server, which does not exist and results in a 404 Not Found error.

To use the interactions interface, you must use the standard GCP Credentials authentication mode by providing a project, location, and valid Google Cloud credentials.

Dominant language
Python
Stars
907
Forks
467
Avg merge
1d 8h
Merged PRs (30d)
40

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