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Help center
Find step-by-step instructions and troubleshooting solutions in our knowledge base.
POPULAR TOPICS
Integrations
Flows
Audience
Campaigns
Sign-up forms
Deliverability & compliance
HELP BY PRODUCT
SMS
Reviews
Marketing Analytics
Customer Hub
BETA
Academy
Klaviyo Academy
Expert training and education to help you succeed with Klaviyo, and beyond.
ON-DEMAND LEARNING
Quick guides
Learn key strategies and concepts in 15 minutes or less.
Courses
Learn new marketing strategies and apply them to your business with practical examples.
Best practices
Discover top marketing strategies based on your core business goals.
LIVE LEARNING
Live trainings
Build confidence through hands-on interactive workshops and thought-provoking strategy sessions.
Live office hours
Join a strategic discussion where you can ask questions and get answers in real-time.
CREDENTIALS
Klaviyo credentials
Dig deeper into select topics and showcase your expertise with a final exam to earn a certificate and digital badge.
Klaviyo product certificate
Deliverability certificate
Klaviyo developer certificate
See all certificates
Community
Klaviyo Community
Join our thriving community network to connect with brands like yours—online and in person.
JOIN THE CONVERSATION
Ask a question
Post a question and get thoughtful answers from Klaviyo powerusers.
Strategic advice
Recent threads
Meet the Champions
JOIN A USER GROUP
Browse all groups
Your people are waiting. New ideas and connections are a click away.
Developer group
Entrepreneur group
WooCommerce group
JOIN A MEETUP CHAPTER
New York City
Los Angeles
Austin
San Diego
Amsterdam
Developers
Klaviyo Developers
Access API documentation and developer guides to help you build with Klaviyo.
TOP RESOURCES
Get started
Access key resources and a step-by-step checklist for how to start developing with Klaviyo.
List your integration
Learn how to join our ecosystem and get your app listed in our Integrations Directory.
Developer tools
Generate sample data, monitor your API usage, and access our Postman collections.
KLAVIYO APIS
API reference
Browse our full catalog of API docs.
Changelog
Versioning & deprecation policy
Rate limits & error handling
VIDEO TUTORIALS
API tutorials on YouTube
Subscribe to our Klaviyo API Tutorials playlist for easy access to step-by-step developer walkthroughs.
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Build foundational API knowledge
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Try it: Make a POST request
Lessons
Build foundational API knowledge
Course overview
Lessons
Customize your setup with Klaviyo's APIs
Distinguish the parts of an API call
Apply APIs to boost your marketing strategy
Knowledge check
Prepare your development environment
Use Postman to make API calls
Try it: Make your first API call
Knowledge check
Write event data in JSON
Dissect API documentation
Format an API call
Try it: Make a POST request
Knowledge check
Manage your API calls with developer tools
Interpret status codes
Determine the steps to troubleshooting an API call
Define terms and decide on next steps
Final exam
Resources
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Try it: Make a POST request
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