# Customer.io documentation

Research date: 2026-09-12

Documentation coverage: partial.

Reference index, not a mirror of complete vendor documentation. Retrieved pages do not prove the MCP works.

## What it does

Customer.io is a customer engagement platform for creating personalized journeys and better business outcomes across email, push, SMS, and in-app messaging.

## Access and connection

MCP support: none-found

Access requirements: unknown

Authentication: Not recorded

Research checked: 2026-09-12

These details come from catalog research. Check vendor sources for current setup instructions; this is not proof of a tested connection.

## Sources

- https://docs.customer.io/
- https://customer.io
- https://docs.customer.io/integrations/api/customerio-apis/
- https://www.clay.com/integrations/data-provider/customer-io

## Retrieved pages

- https://docs.customer.io/ (fetched)