Quick Definition
Conversion APIs (CAPI) are server-side APIs that enable businesses to send conversion or event data directly from their servers or other controlled systems to advertising platforms (Meta, Google, LinkedIn, etc.). Unlike pixel-based tracking (which relies on browser-side tracking), Conversion APIs send data from the server, providing more reliable tracking that is less affected by browser restrictions, ad blockers, and privacy changes. Conversion APIs were developed in response to privacy changes (iOS 14.5+ ATT, cookie restrictions) that limited pixel-based tracking. Conversion APIs enable more accurate conversion tracking, better attribution, and improved campaign optimization.
How It Works
Conversion APIs work by sending event data from your server to advertising platforms: when a conversion event occurs on your website (form submission, purchase, etc.), your server sends the event data directly to the advertising platform's API. The event data includes: event type (Purchase, Lead, etc.), event parameters (value, currency, content IDs), user data (hashed email, phone, etc. for matching), and event metadata (timestamp, event ID). The advertising platform receives the event data and uses it for attribution, optimization, and reporting. Conversion APIs complement pixel-based tracking and provide more reliable tracking.
Frequently Asked Questions
What is the difference between Conversion API and pixel tracking?
Conversion API sends conversion data from your server to advertising platforms. Pixel tracking uses browser-side tracking (pixels) to track conversions. Conversion API is more reliable and less affected by browser restrictions, ad blockers, and privacy changes.
How do you implement Conversion API?
Implement Conversion API by: setting up server-side event tracking, sending event data to advertising platform APIs, hashing user data for privacy, and testing implementation. Each platform (Meta, Google, LinkedIn) has specific API documentation. Consult platform documentation for implementation details.
How do Conversion APIs help with privacy compliance?
Conversion APIs help with privacy compliance by: sending hashed user data (not raw data), complying with privacy regulations (GDPR, CCPA), and providing more reliable tracking than pixel-based tracking. Ensure compliance by obtaining consent, hashing data, and providing clear privacy policies.