Hi @TheAnh,
Welcome to the Klaviyo Community and thank you for your question.
Absolutely - Klaviyo has extensive APIs available. All the documentation is provided at developers.klaviyo.com.
I recommend looking at the “Guides” section in the menu at the top as there is a lot of detail there on the left hand side about how the integration itself works. There are also Postman Collections set up, and Node/PHP/Python/Ruby SDK’s are available here.
If you are looking at joining the Klaviyo ecosystem, this would be a great page to start. And as a final highlight I would recommend that your development team goes through the Klaviyo Developer Certification - this explains the Klaviyo data model, the key API’s available, specific use cases and examples for both server-side and client-side APIs and error handling.
You’ve also landed on a great community - so if you have any specific questions feel free to post in this forum.
I hope that helps you on your way!
Thanks
David