Kartra API

Kartra's inbound developer API. One endpoint, POST only, form-encoded, with the operation selected by `actions[].cmd`. Twenty-nine documented commands cover leads, tags, lists, automation sequences, custom fields, lead scoring, pages, calendar bookings, payment transactions and recurring subscriptions. Every call carries three credentials in the body — the developer's `app_id` plus the end user's `api_key` and `api_password` — and acts on exactly one lead. Rate limited to 20 calls per second per App.

Documentation

Other Resources

API entry from apis.yml

apis.yml Raw ↑
aid: kartra:kartra-api
name: Kartra API
description: Kartra's inbound developer API. One endpoint, POST only, form-encoded, with the operation
  selected by `actions[].cmd`. Twenty-nine documented commands cover leads, tags, lists, automation sequences,
  custom fields, lead scoring, pages, calendar bookings, payment transactions and recurring subscriptions.
  Every call carries three credentials in the body — the developer's `app_id` plus the end user's `api_key`
  and `api_password` — and acts on exactly one lead. Rate limited to 20 calls per second per App.
humanURL: https://support.kartra.com/en/collections/19655232-developers
baseURL: https://app.kartra.com/api
tags:
- Marketing Automation
- Contacts
- Email Marketing
- Payments
- Subscriptions
properties:
- type: Documentation
  url: https://support.kartra.com/en/collections/19655232-developers
- type: APIReference
  url: https://support.kartra.com/en/articles/15369013-connecting-to-the-api
- type: GettingStarted
  url: https://support.kartra.com/en/articles/15369011-activating-your-app
- type: Authentication
  url: authentication/kartra-authentication.yml
- type: Conventions
  url: conventions/kartra-conventions.yml
- type: ErrorCatalog
  url: errors/kartra-error-codes.yml
- type: RateLimits
  url: rate-limits/kartra-rate-limits.yml
- type: Sandbox
  url: sandbox/kartra-sandbox.yml
- type: DataModel
  url: data-model/kartra-data-model.yml
- type: Webhooks
  url: asyncapi/kartra-webhooks.yml
- type: MCPServer
  url: mcp/kartra-mcp.yml
- type: AgentSkill
  url: skills/_index.yml