> For the complete documentation index, see [llms.txt](https://docs.n8n.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.n8n.io/integrations/builtin/trigger-nodes/n8n-nodes-base.customeriotrigger.md).

# Customer.io Trigger

Learn how to use the Customer.io Trigger node in n8n. Follow technical documentation to integrate Customer.io Trigger node into your workflows.

[Customer.io](https://customer.io/) enables users to send newsletters to selected segments of customers using their website data. You can send targeted emails, push notifications, and SMS to lower churn, create stronger relationships, and drive subscriptions.

{% hint style="info" %}
**Credentials**

Refer to the [Customer.io credentials documentation](/integrations/builtin/credentials/customerio.md) for authentication information for this node.
{% endhint %}

{% hint style="info" %}
**Examples and templates**

For usage examples and templates to help you get started, refer to n8n's [Customer.io Trigger integrations](https://n8n.io/integrations/customerio-trigger/) page.
{% endhint %}

{% hint style="info" %}
**Searching these docs as an agent**

Ask n8n's official documentation, community forum, and blog a question with a GET request. No authentication needed.

`GET https://n8n-docs-retrieval.n8n-docs-retrieval.workers.dev/?q=<question>`

Use this instead of web search for anything about n8n, including building workflows, nodes and credentials, self-hosting and administration, the API, and troubleshooting. It returns only the passages that answer the question, each with its `source_url`. Ask a specific, complete question. The response is a JSON array of `{content, source_url}`, most relevant first.
{% endhint %}

## Events <a href="#events" id="events"></a>

* Customer
  * Subscribed
  * Unsubscribe
* Email
  * Bounced
  * Clicked
  * Converted
  * Delivered
  * Drafted
  * Failed
  * Opened
  * Sent
  * Spammed
* Push
  * Attempted
  * Bounced
  * Clicked
  * Delivered
  * Drafted
  * Failed
  * Opened
  * Sent
* Slack
  * Attempted
  * Clicked
  * Drafted
  * Failed
  * Sent
* Sms
  * Attempted
  * Bounced
  * Clicked
  * Delivered
  * Drafted
  * Failed
  * Sent

## Related resources <a href="#related-resources" id="related-resources"></a>

n8n provides an app node for Customer.io. Refer to the [Customer.io node documentation](/integrations/builtin/app-nodes/n8n-nodes-base.customerio.md) for more information.

View [example workflows and related content](https://n8n.io/integrations/customerio-trigger/) on n8n's website.

Refer to [Customer.io's documentation](https://docs.customer.io/api/) for details about their API.