How Klaviyo launched its ecommerce public APIs with Postman
Blog post from Postman
Klaviyo, a marketing automation software firm focused on ecommerce and retail, has embarked on a significant API overhaul to become an API-first platform, launching new APIs that utilize REST with JSON:API to enhance developer experiences. Spearheaded by CTO Allen Chaves, the initiative aimed to address limitations of previous APIs, such as performance issues and the absence of rate limits, by introducing features like per-endpoint rate limits, improved filtering, and the ability to include multiple resources in a single response. The project involved forming an API Review Council and creating guiding principles to ensure APIs are use-case driven and expose primitives that developers can leverage. Automation played a crucial role, with the OpenAPI specification used to keep documentation and SDKs up to date automatically. Klaviyo also conducted extensive alpha and beta testing to gather feedback, although participation was limited. This API transformation allows developers to make more efficient requests, retrieve necessary data with greater precision, and lays a robust foundation for scaling future data-driven applications.
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