Posted by the APIs.io catalog. APIs.io does not own or sell this API; access comes from the provider, Kit.
The Kit Accounts API is the Accounts API from Kit, the creator email marketing platform formerly known as ConvertKit. It offers 5 operations for accounts on the v4 REST API at https://api.kit.com/v4. It suits developers and creators who want to build account-related features into their own tools or automations alongside the wider Kit platform, which covers subscribers, tags, forms, sequences, broadcasts and webhooks.
What is published for it: OpenAPI, Documentation, Authentication, ChangeLog, Overlay and APIsJSON. Kit authenticates with an X-Kit-Api-Key header for personal automation, or OAuth 2.0 for apps published to the Kit App Store.
Ratings from the catalog: the provider's Kin Score is 79.7 (exemplar band). Agent Readiness is 64.4 (agent-ready band), scored on 2026-10-23.
Pricing: set by the provider. The catalog lists Kit as a paid service with self-serve signup.
Condition: a live hosted API listed in the APIs.io catalog; you call the provider's own endpoint.
Developer docs: https://developers.kit.com
Catalog listing: https://apis.io/apis/convertkit/convertkit-accounts-api/ Provider: https://kit.com