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What is Conversion API (CAPI) and why is first-party server-side tracking mandatory post-cookie loss?

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Version 1 (Edit)

Edited by Gaurav Bhasin · Aug 24, 2026 7:38 AM

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Title snapshot

What is Conversion API (CAPI) and why is first-party server-side tracking mandatory post-cookie loss?

Summary snapshot

Bypassing browser ad blockers and iOS ATT restrictions via server-to-server webhook events.

Content snapshot

### CAPI Implementation Send transaction event payloads directly from backend Laravel controllers to Meta/Google APIs with hashed email/phone parameters for > 90% Event Match Quality scores.

Source snapshot

https://developers.google.com/search/docs

Version 1 (Original Post)

Published by Gaurav Bhasin · Aug 9, 2026 5:37 AM

Original Publication

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Post originally created and published to the Global Hub.

Original Title

What is Conversion API (CAPI) and why is first-party server-side tracking mandatory post-cookie loss?

Original Summary

Bypassing browser ad blockers and iOS ATT restrictions via server-to-server webhook events.

Original Content

### CAPI Implementation Send transaction event payloads directly from backend Laravel controllers to Meta/Google APIs with hashed email/phone parameters for > 90% Event Match Quality scores.

Original Sources

https://developers.google.com/search/docs