Connect API and Klaviyo to automate your work
MESA's API to Klaviyo integration is the fastest way to sync data between the two — without touching a line of code. Choose which fields to send, how they're formatted, and when the sync happens. Start with a pre-built template, customize it with AI, or build something completely unique in under 10 minutes.
★★★★★ 4.9 rating on Shopify App Store
Why integrate API with Klaviyo
The API to Klaviyo integration helps you sync data, automate manual tasks, and keep your stack aligned — without writing code.
Pull live data into any Shopify workflow
When an order fires, MESA calls an external API and brings the response in as variables. Pricing feeds, fraud scores, or inventory levels from any service become available to every step that follows.
Send order details to your internal systems
MESA posts Shopify order data to your internal API or ERP the moment an order is created. Your operations and fulfillment tools stay current without custom middleware or manual exports.
Enrich orders with third-party data at checkout
MESA calls an external API at the moment of purchase — pulling fraud signals, shipping rates, or tax data — and uses the response to route or update the order before fulfillment starts.
Keep Klaviyo profiles current as customers shop
When a customer's behavior changes in Shopify — a new purchase, a tag update, a loyalty tier change — MESA updates their Klaviyo profile in real time. Your segments and flows always reflect who your customers are right now.
Trigger Klaviyo flows from any Shopify event
When an order is placed, a subscription starts, or a customer hits a milestone, MESA sends the signal to Klaviyo and starts the right flow. Your email automation runs on the full range of what happens in your store, not just native Shopify triggers.
Suppress the right customers from campaigns automatically
When a customer files a return, opens a support ticket, or enters a sensitive window, MESA updates their Klaviyo suppression list or profile status. Your campaigns reach the right people at the right time without manual list hygiene.
Build any API and Klaviyo automation
MESA helps you connect apps to automate repetitive tasks. A trigger is an event that starts a workflow, and actions are the steps that occur when it's running.
Expert support included
MESA includes hands-on support from automation experts who know how to get things done.
Free workflow setup
We'll build your first workflow with you live. Most merchants walk away with automation saving 5+ hours/week.
Fast response times
Average first response: Same day. Critical issues: Immediate escalation. Complex builds: 24-48 hours.
Managed services available
Personalized workflow reviews, and quarterly check-ins to identify new opportunities as your business grows.
Real humans, always
Chat with real automation experts (not bots). Email support 9am-5pm PST. Google Meet sessions for complex workflows.
Learn how to automate API
Integrate API with Klaviyo today.
Enjoy a 7-day free trial. Get your first workflow in minutes.
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