Skip to main content
Kit is designed to sit at the centre of your creator tool stack — connected to your website, your course platform, your checkout system, and any other tool you use to run your business. You can connect Kit via native integrations, through Zapier’s 5,000+ app ecosystem, or directly through Kit’s REST API if you want programmatic control.

​
Native Integrations

WordPress

The official Kit for WordPress plugin lets you embed opt-in forms, landing pages, and pop-ups — including exit-intent pop-ups — on any page or post. Subscribers sync to Kit instantly.

Shopify

Sync Shopify customer data with Kit automatically. Trigger email sequences on purchase, tag customers by product purchased, and build post-purchase nurture flows for your shop buyers.

Teachable

Connect Teachable so that course enrollments automatically apply tags or start sequences in Kit. Build onboarding flows for new students without any manual work.

Zapier

Connect Kit to 5,000+ apps through Zapier. If a tool doesn’t have a native Kit integration, Zapier almost certainly bridges the gap. No code required.

Stripe

Trigger Kit automations directly from Stripe payment events — useful when you’re using Stripe for payments outside of Kit Commerce. Tag buyers, start sequences, or fire webhooks on successful charges.

Webflow

Embed Kit opt-in forms and landing pages directly in your Webflow site. Use Webflow’s custom code embed block to drop in Kit’s form embed code on any page.

​
Additional Native Integrations

Beyond the six above, Kit also integrates natively with:
  • Thinkific and Podia — Sync course enrollments as Kit tags or sequence triggers
  • MemberSpace and Memberful — Sync membership status as Kit tags; automatically add or remove the ‘member’ tag when subscriptions start, pause, or cancel
  • Squarespace — Embed Kit forms on any Squarespace page via the code block
  • Kajabi — Connect purchases and course enrollments to Kit subscriber actions
Find the full integration directory in your Kit dashboard under Integrations in the left sidebar.

​
Zapier Integration

Zapier is the fastest way to connect Kit to tools that don’t have a native integration. A “Zap” is a two-part automation: a trigger (something that happens in one app) and an action (something Kit does in response, or vice versa).

​
Kit Triggers in Zapier

These events in Kit can start a Zap:
  • New subscriber added
  • Tag applied to a subscriber
  • Purchase completed (Kit Commerce)

​
Kit Actions in Zapier

These things Kit can do as the action in a Zap:
  • Subscribe someone to your Kit list
  • Add a tag to a subscriber
  • Create a new subscriber profile
  • Remove a tag from a subscriber

​
Example Zapier Workflows

Trigger appTrigger eventKit actionUse case
TypeformNew form responseCreate subscriber + apply tagWebinar registrations, quiz responses
CalendlyNew bookingApply tagTag subscribers who book a discovery call
GumroadNew saleCreate subscriber + apply ‘customer’ tagMigrate Gumroad buyers into Kit
AirtableNew recordCreate subscriberImport bulk subscriber additions
CircleNew memberApply ‘community-member’ tagSync community membership status
Zapier is the fastest way to connect Kit to tools that don’t have a native integration. The most useful Zap to build first: New Typeform response → Create Kit subscriber + apply tag. If you use Typeform for any lead generation, this Zap closes the gap between form submission and email nurture instantly.

​
Kit REST API

For developers who want direct, programmatic integration, Kit provides a full REST API. Base URL: https://api.kit.com/v4/ Authentication: All requests require your API key, passed as a header. Find your key in Account Settings → Developer → API Keys.

​
Key Endpoints

MethodEndpointWhat it does
GET/subscribersList all subscribers with filtering options
POST/subscribersCreate a new subscriber
GET/subscribers/{id}Get a single subscriber by ID
PUT/subscribers/{id}Update subscriber fields
POST/tags/{id}/subscribersApply a tag to a subscriber
POST/sequences/{id}/subscribersEnrol a subscriber in a sequence
GET/formsList all forms
POST/forms/{id}/subscribersSubscribe someone via a specific form

​
Adding a Subscriber via the API

Use this curl example to add a subscriber programmatically: 
curl -X POST https://api.kit.com/v4/subscribers \
  -H 'Content-Type: application/json' \
  -H 'X-Kit-Api-Key: YOUR_API_KEY' \
  -d '{"email_address": "user@example.com", "first_name": "Jane"}'
Replace YOUR_API_KEY with your actual API key from Account Settings. The response returns the new subscriber’s Kit ID, which you can store in your own database for future API calls. To apply a tag immediately on creation, include the tag ID in the request body: 
curl -X POST https://api.kit.com/v4/subscribers \
  -H 'Content-Type: application/json' \
  -H 'X-Kit-Api-Key: YOUR_API_KEY' \
  -d '{
    "email_address": "user@example.com",
    "first_name": "Jane",
    "tags": [12345]
  }'
Tag IDs are visible in your Kit dashboard URL when you view a tag, or retrievable via the GET /tags endpoint.

​
Webhooks

Kit can push data to your own server in real time when subscriber events occur. This is useful when you want to trigger actions in your own application without polling the API.

​
Available Webhook Events

  • Subscriber created — A new subscriber is added to your account
  • Subscriber unsubscribed — A subscriber opts out
  • Tag applied — A specific tag is added to a subscriber
  • Tag removed — A tag is removed from a subscriber
  • Purchase completed — A Kit Commerce purchase is finalised

​
Setting Up a Webhook

  1. Go to Account Settings → Developer → Webhooks
  2. Click Add Webhook
  3. Enter your endpoint URL (a publicly accessible HTTPS URL on your server)
  4. Select the event(s) you want to receive
  5. Click Save — Kit will immediately send a test payload to verify the connection
Kit signs webhook payloads with an HMAC signature so your server can verify that the request genuinely came from Kit. Check the X-Kit-Signature header in your webhook handler.