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API
Customer.io API
Mar 12, 2026
About
Customer.io API collects and routes first-party data to power personalized, omnichannel customer journeys. Trigger broadcasts and transactional messages, and fetch data to automate engagement and growth.
How to Use
01
Find the API
Browse this directory to find the API that connects to the tool you need.
02
Read the documentation
Visit the API documentation to understand endpoints, authentication, and rate limits.
03
Integrate into your workflow
Use the API endpoints in your application to automate data flows and sync information.