# Customer.io Documentation

> Customer.io is a messaging automation platform for sending targeted email, push notifications, SMS, in-app messages, and webhooks based on customer behavior and data attributes. These docs cover setup, integration, messaging, segmentation, analytics, and API reference.

Customer.io documentation is organized into the following sections. Each section has its own `llms.txt` file with detailed page listings.

## Sections
- [Get Started](https://docs.customer.io/get-started/llms.txt): Get Started documentation
- [Journeys](https://docs.customer.io/journeys/llms.txt): Journeys documentation
- [Integrations](https://docs.customer.io/integrations/llms.txt): Integrations documentation
- [Account & Workspaces](https://docs.customer.io/accounts-and-workspaces/llms.txt): Account & Workspaces documentation
- [AI](https://docs.customer.io/ai/llms.txt): AI documentation

## Additional resources

- [Full documentation](https://docs.customer.io/llms-full.txt): Complete text of all documentation pages in a single file
- [Pipelines API spec](https://docs.customer.io/files/pipelines.json): OpenAPI spec for the Data Pipelines API
- [Track API spec](https://docs.customer.io/files/journeys-track.json): OpenAPI spec for the Track API
- [App API spec](https://docs.customer.io/files/journeys-app.json): OpenAPI spec for the App API
- [Webhooks spec](https://docs.customer.io/files/journeys-webhooks.json): OpenAPI spec for reporting webhooks