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Incident affecting Agent Assist, Dialogflow CX, Google Cloud Support, Vertex Gemini API

Vertex AI Gemini API customers experienced increased error rates when accessing the global endpoint.

Incident began at 2026-02-27 04:36 and ended at 2026-02-27 06:45 (all times are US/Pacific).

Previously affected location(s)

GlobalMontréal (northamerica-northeast1)São Paulo (southamerica-east1)Iowa (us-central1)South Carolina (us-east1)Northern Virginia (us-east4)Columbus (us-east5)Oregon (us-west1)

Date Time Description
27 Feb 2026 08:12 PST

Description
Between Friday, 2026-02-27, 04:36 and 06:45 PST, customers experienced increased error rates when accessing the Vertex Gemini API Global endpoint. The issue impacted API requests to multiple Gemini models.

The incident also caused downstream impact to Dialogflow CX, Agent Assist, Google Cloud Support AI agent, and Customer Experience Agent Studio, which rely on Gemini APIs.

Preliminary analysis indicates the issue was triggered by a recent configuration change. Service was fully restored after the configuration change was rolled back.

We thank you for your patience while we worked on resolving the issue.

Symptom
Customers experienced increased error rates when sending API requests to impacted multiple Gemini models through the global endpoint.