META CAPI

Sabrina Sullivan · 2026-10-10T17:23:00.629Z

How to send event_id via the Meta CAPI workflow action? (pixel/CAPI deduplication) Setup: Meta ads → GHL funnel. The Schedule conversion fires via the native Meta CAPI workflow action (triggered on funnel event). Pixel is on the funnel pages. Goal: have BOTH pixel and CAPI fire the Schedule event with matching event_ids so Meta dedupes them. Right now I've got the pixel restricted to PageView only to avoid double-counting — which means zero redundancy if CAPI ever fails silently. Problem: the Meta CAPI workflow action doesn't seem to have an event_id field. I toggled Custom Mapping ON — the only field that appeared was FBCLID, nothing else below it. No event_id anywhere. 1. Is there any way to pass event_id through the native action that I'm missing? 2. If not, is the recommended move to replace it with a generic Webhook POST to Meta's graph API events endpoint with a manually built payload (including event_id)? Screenshots of a working setup would be amazing. Thanks!

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META CAPI

META CAPI