Stripe + Klaviyo integration

Plandalf has no Klaviyo steps and does not sync Stripe customers or invoices into Klaviyo. Klaviyo documents its own Stripe integration for that. What Plandalf adds is Send Webhook: a sequence on a paid checkout can post an event to Klaviyo's API, and a Klaviyo flow can post back to a Plandalf catch URL.

1. Create the Klaviyo key

   In Klaviyo create a private API key with the events:write scope. Klaviyo's reference says each request also needs a revision header in date form, so copy the current one from its docs.

2. Start a sequence from the checkout

   In Plandalf go to Automation, then My Sequences, and create a sequence with Plandalf as the app and Checkout Completed as the trigger. On the Test tab pick your latest checkout as the sample so the variable menu fills.

3. Add a Send Webhook step

   Choose Plandalf, Send Webhook. Set the URL to Klaviyo's events endpoint, the method to POST, and add an Authorization header holding Klaviyo-API-Key and your key, plus the revision header.

4. Build the payload

   Write a JSON body in Klaviyo's shape: a metric object with a name such as Plandalf Order, a profile object whose email is {{trigger.customer_email}}, properties with {{trigger.line_items_summary}} and {{trigger.invoice_number}}, and a numeric value of {{trigger.total_amount}}.

5. Run the step test

   Test the step with your own email. A step test is real and writes to Klaviyo. Klaviyo's reference lists HTTP 202 as the success reply, so look for that in the step output.

6. Switch the sequence on and rehearse

   Turn the sequence on, enable Run on test purchases in its Settings, buy with a Stripe test card, read the run in the Events view, then switch the setting off. Build the Klaviyo flow on the new metric afterwards.

• Klaviyo's own Stripe integration is a separate, one-way sync from Stripe into Klaviyo that you set up with a Stripe webhook. Plandalf is not part of it, and it only creates a profile when a listed Stripe event has a valid email.
• Klaviyo's flow Webhook action sends POST requests only, needs an HTTPS URL that does not redirect, and its body must be JSON. Editing webhook actions needs two-step authentication and a Manager, Admin or Owner role.
• Plandalf's Send Webhook gives the receiver 30 seconds to answer, and its docs do not promise retries or exactly-once delivery. Check the run in the Events view before you resend a step, so one sale does not become two events.
• Plandalf cannot start a sequence when a buyer cancels a subscription, so a Klaviyo churn flow has to come from Klaviyo or Stripe data.
• Marketing consent is yours to manage. A purchase event does not subscribe anyone to Klaviyo email by itself.

Does Stripe integrate with Klaviyo?

Yes, Klaviyo documents a Stripe integration of its own that syncs invoices and payment outcomes into Klaviyo. Plandalf is separate from it. Plandalf's route is a webhook that posts an event to Klaviyo after a paid Plandalf checkout.

How do I connect Stripe to Klaviyo?

Either use Klaviyo's Stripe integration, which needs a Stripe webhook pointed at Klaviyo, or send Plandalf purchases with a Send Webhook step to Klaviyo's events API. The setup above covers the second.

Can Plandalf send Stripe purchases to Klaviyo?

Yes, through Send Webhook. Plandalf has no Klaviyo app, so you write the event body yourself with trigger variables such as the buyer's email and the order total.

Can a Klaviyo flow start a Plandalf countdown?

Yes. Add a Webhook action to the flow that posts the profile's email to a Plandalf catch URL, and have that sequence run Enroll in Promo.

Checked October 26, 2026 against Plandalf's own setup guides and the vendor documentation: Klaviyo Help Center: Integrate with Stripe, Klaviyo developers: add a webhook action to a flow, Klaviyo API reference: Create Event.