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Examples / Cloud events: AWS, Google Cloud and Azure / Google Cloud Billing budgets (via Pub/Sub)

Google Cloud Billing budgets (via Pub/Sub) webhooks

Programmatic budget notifications: current spend against the budget, at each threshold and on every update.

Events

  • budget notification (costAmount, budgetAmount, alertThresholdExceeded)

Signature

Pub/Sub push: optional OIDC token.

Retries

Pub/Sub retry with backoff until acknowledged.

See a retry schedule in the calculator.

Sample request from Google Cloud Billing budgets (via Pub/Sub)illustrative, shortened
Content-Typeapplication/json
{
  "message": {
    "attributes": { "billingAccountId": "01D4EE-079462-DFD6EC", "budgetId": "de72f49d-…", "schemaVersion": "1.0" },
    "data": "eyJidWRnZXREaXNwbGF5TmFtZSI6Im1vbnRobHktcHJvZCIsImNvc3RBbW91bnQiOjQxMi4zNywiY29zdEludGVydmFsU3RhcnQiOiIyMDI2LTEwLTAxVDA3OjAwOjAwWiIsImJ1ZGdldEFtb3VudCI6NTAwLjAsImFsZXJ0VGhyZXNob2xkRXhjZWVkZWQiOjAuOCwiY3VycmVuY3lDb2RlIjoiVVNEIn0=",
    "messageId": "2070443601311542",
    "publishTime": "2026-10-09T06:34:00Z"
  },
  "subscription": "projects/acme-prod/subscriptions/budget-push"
}