aid: convertkit
name: Kit (formerly ConvertKit)
description: >-
  Kit, formerly ConvertKit, is an email marketing and audience growth
  platform built for creators, offering subscriber management, broadcasts,
  email sequences, landing pages, forms, tags, segments, custom fields,
  and creator commerce. The platform helps newsletter authors, podcasters,
  course creators, and small businesses grow and monetize their audiences.
  The Kit API V4 provides cursor-paginated REST endpoints for managing
  subscribers, broadcasts, forms, tags, custom fields, sequences, and
  e-commerce data, authenticated via API keys or OAuth 2.0 for App Store
  integrations.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Email Marketing
  - Audience Growth
  - Creator Economy
  - Newsletters
  - Marketing Automation
  - Subscriber Management
  - Broadcasts
url: >-
  https://raw.githubusercontent.com/api-evangelist/convertkit/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.19'
apis:
  - aid: convertkit:api-v4
    name: Kit API V4
    description: >-
      REST API V4 for managing Kit subscribers, broadcasts, forms, tags,
      custom fields, sequences, purchases, and webhooks. Supports cursor
      pagination and bulk requests, authenticated via API keys or OAuth
      2.0 for App Store integrations.
    humanURL: https://developers.kit.com/v4
    baseURL: https://api.kit.com/v4
    tags:
      - Email Marketing
      - Subscribers
      - Broadcasts
      - Tags
      - Forms
    properties:
      - type: Documentation
        url: https://developers.kit.com/v4
      - type: Developer Portal
        url: https://developers.kit.com/
      - type: App Store
        url: https://developers.kit.com/app-store
common:
  - type: Website
    url: https://kit.com
  - type: Documentation
    url: https://developers.kit.com/
  - type: Pricing
    url: https://kit.com/pricing
  - type: Sign Up
    url: https://app.kit.com/users/signup
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com