> ## Documentation Index
> Fetch the complete documentation index at: https://docs.archal.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Customer.io clone

> Test Customer.io messaging agents against a stateful clone of campaigns, broadcasts, transactional email, API triggers, segments, customers, and message delivery with service-shaped responses.

Clone ID: `customerio`

## Start here

| Question     | Answer                                                                                                                                  |
| ------------ | --------------------------------------------------------------------------------------------------------------------------------------- |
| Best for     | Messaging agents that send transactional email, trigger campaigns and broadcasts, or inspect segments, customers, and delivery history. |
| Connect with | Direct REST base URLs when Customer.io is available in your workspace.                                                                  |
| Known limits | Customer.io is REST-first and focused on the App API. It does not deliver real email or run live campaign automation.                   |
| Seeds        | Common seeds: `empty`. See [Seeds](/guides/seeds) for usage.                                                                            |

## What it covers

* Transactional email send
* Campaign and broadcast API triggers
* Campaigns, broadcasts, and their actions
* Segments and customer membership
* Customers and message delivery history
* Service-shaped REST responses and error envelopes

## Surface

Use Customer.io when your agent sends transactional email or triggers campaigns
and broadcasts, and you need deterministic checks without delivering real
messages.