How to Send SliceWP Data to Customer.io

Written by Nasir Ahmed
PublishedAugust 2, 2026
Reading time3 min read

Customer.io is a marketing automation platform. SliceWP tracks an affiliate registers or a commission is recorded, but sending that data to external platforms needs an integration. AFI bridges that gap to Customer.io.

Why connect directly?

Cloud automation tools like Zapier charge per task and route your data through external servers. AFI processes everything on your WordPress site. No per-referral fees, no external dependencies.

What you will need

  • A WordPress site with SliceWP installed and configured.
  • A Customer.io account.
  • The Advanced Form Integration plugin (free from WordPress.org).

Connect Customer.io to AFI

  1. Log in to your Customer.io account.
  2. Go to Settings → API Credentials and copy your Site ID and API Key.
  3. In WordPress, go to AFI → Settings → Customer.io.
  4. Enter the Site ID and API Key, then click Save Changes.

Setting up the integration

1. Create a new integration

Go to AFI → Add New. Name it SliceWP to Customer.io.

2. Pick your trigger

Select SliceWP as the form provider. AFI fires when an affiliate registers or a commission is recorded, giving you access to affiliate details, referral amounts, and commission data.

3. Select Customer.io as the destination

Choose Customer.io from the platform dropdown and pick Add Customer. This creates or updates a customer in Customer.io.

4. Map fields

Match each Customer.io field on the left to the corresponding SliceWP field on the right. Common mappings include affiliate name, email, referral ID, commission amount, and status. You can also use smart tags like {{_submission_date}}.

5. Add conditions if needed

Only want to send certain referrals? Set up a conditional rule based on any field value.

6. Save and test

Click Save Integration. Trigger a test event in SliceWP. Check Customer.io to confirm the data arrived. If anything looks wrong, open AFI → Log to see the exact request and response.

Free vs Pro

The free version maps email, name, and standard attributes to Customer.io with unlimited referrals. Pro adds custom attributes and event tracking. No per-referral fees on any plan.

Frequently asked questions

Which SliceWP events trigger the integration?

AFI fires when an affiliate registers or a commission is recorded. This covers new affiliate registrations, referral creations, and commission status changes.

Will adding this slow down my site?

No. AFI sends data to the destination after the affiliate event completes. Your site performance is not affected.

Can I send affiliate data to multiple platforms?

Yes. Create a separate integration for each destination, and every event flows to all of them simultaneously.

Get started

Install Advanced Form Integration free from WordPress.org and connect SliceWP to Customer.io in minutes.

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