Signals / CAPI / X (Twitter) Conversion API Implementation
X (Twitter) Conversion API Implementation
Server-side conversion delivery for X Ads: how it works, dedupe with the Pixel, and how to verify it landed.
Quick answer
X's Conversion API sends conversion events from your server directly to X Ads, deduplicated against the X Pixel, recovering conversions a browser-only setup would lose.
What X Conversion API does
X's Conversion API sends conversion events (sign-ups, purchases, leads) from your server directly to X Ads, the same events your X Pixel tracks client-side. It exists for the same reason every other platform now offers a server-side path: browser-based tracking alone loses events to ad blockers and browser privacy features the server does not depend on.
How delivery works
A server-side call to X's Conversion API endpoint carrying the event, matched customer parameters, and a shared identifier with any corresponding client-side Pixel event, so X can deduplicate the two into one counted conversion.
Consent handling and verification
Gate the server-side event on the same consent record your Pixel implementation respects. Verify delivery and match status in X Ads' own conversion tracking dashboard - not from a 200 response on your own server - the same verification discipline applied to every platform this practice implements.
Frequently Asked Questions
What is the X Conversion API?
X's Conversion API (formerly Twitter's) is a server-to-server connection that sends conversion events from your server directly to X Ads, complementing the browser-based X Pixel - the same server-side pattern now standard across Meta, TikTok, Google, and LinkedIn.
Is X Conversion API worth implementing given its lower measured search volume?
hypothesis: search-volume data measures how many people research the implementation, not how much ad spend runs through the platform. If X is a meaningful channel in your paid mix, the same event-loss problem applies to it as to any other platform, regardless of how few people search for the term.
Does X Conversion API need to run alongside the Pixel?
Yes, deduplicated with a shared event identifier, following the same pattern as every other platform in this practice.
Running X Ads Without A Server-Side Conversion Connection?
We will check your current X Pixel setup and scope what a Conversion API implementation adds.