by Customer.io
Trigger a broadcast
Sends an API-triggered broadcast now or at a scheduled time, to its saved audience or to the people, emails or filter you pass, with data for its Liquid placeholders.
Updated Sep 27, 2026
trigger-broadcast.md
Trigger a broadcast
Sends an API-triggered broadcast now or at a scheduled time, to its saved audience or to the people, emails or filter you pass, with data for its Liquid placeholders.
Note: Set the broadcast up in Customer.io first. Unknown recipients fail the request unless you set email_ignore_missing or id_ignore_missing to true, and the endpoint allows one request every 10 seconds.
Set up
Use the first option your agent supports.
API (official)
- Base URL: https://api.customer.io
- Endpoint:
POST /v1/campaigns/{broadcast_id}/triggers - Auth: send the header
Authorization: Bearer $CUSTOMERIO_API_KEY - Get a key: https://fly.customer.io/settings/api_credentials?keyType=app
- Docs: https://docs.customer.io/integrations/api/app/
Before anything else, confirm access with the cheapest read-only call, like a list or a search. Never send or change anything to test access.
Rules
- Ask the user before anything that sends messages, costs money, or changes data, and say how many records it touches. One approval covers a batch the user has seen.
- Never print API keys.
Ways in
| Route | Source | Call | Required | Docs |
|---|---|---|---|---|
| Official | POST /v1/campaigns/{broadcast_id}/triggers | API key in $CUSTOMERIO_API_KEY | Docs |