Dynamic webhooks not firing

Gemini API
1

I am trying to use dynamic webhooks with Interactions API and the Omni Flash.

The background mode is accepted and webhook_config is correctly reported back in the created interaction:

{ "id": "v1_ChdOdXRoYXJHTUxxS3l2ZElQMC1UcnlBcxIXTnV0aGFyR01McUt5dmRJUDAtVHJ5Q..", "status": "in_progress", "created": "2026-07-23T10:21:43Z", "updated": "2026-07-23T10:21:43Z", "service_tier": "standard", "webhook_config": { "uris": [ "https://webhook.site/a08523c1-2f3f-4157-a077-34e898e7d33e" ], "user_metadata": { "token": "test-correlation-token" } }, "object": "interaction", "model": "gemini-omni-flash-preview" }

However, the video generation ends successfully, I get completed status on the GET by ID with the video URL link. But the dynamic webhook was never called. Zero requests. Tried also to change to different webhook uri, added path, whatever, does not work.

Is there any whitelisting or prerequisites for dynamic webhooks. What could I be doing wrong?

For referece GET interaction returns:

{
"id": "v1_ChdOdXRoYXJHTUxxS3l2ZElQMC1UcnlBcxIXTnV0aGFyR01McUt5dmRJUDAtVHJ5Q..",
"status": "completed",
"usage": {
"total_tokens": 59220,
"total_input_tokens": 11,
"input_tokens_by_modality": [
{
"modality": "text",
"tokens": 11
..

2

Hi,

Thank you for bringing this to our attention.

We are looking into this and will provide an update on this thread

3

@Payal_Sharma2 Any news on the issue?

We would love to finish the integration, but prefer to use webhooks instead of continuously calling GET / operations..

4

Hi, could you please confirm if this has been resolved now?

5

@Payal_Sharma2 I can confirm this works now. Thanks.