Envelope reference · Builder's Library

The Meta CAPI Envelope Kit

The exact Conversions API envelope — hashed, deduped against the pixel, and shaped the way Meta scores match quality.

Unlock the kit

Meta's Conversions API rewards one thing above all: match quality. Send the same lead with a clean, fully hashed envelope and the event matches a person; send it sloppy and it is noise. The reference catalogs the fields; this kit is the envelope you actually send, in the order that moves Event Match Quality.

Two events for one lead — one from the pixel, one from the server — is the default failure. The kit's spine is the dedupe contract: the same event_id and event_name on both sides, so Meta collapses them into a single, better-matched event instead of counting two. Normalization and hashing rules come next, because an unhashed email is a dropped match.

Free — one email

Unlock The Meta CAPI Envelope Kit.

Drop your email and the full kit opens right here — plus the next one when it ships. No drip sequence, no spam. Unsubscribe in one click.

Already unlocked on this device? The kit opens automatically.

This kit ships with the playbook it came from: Meta Conversions API Envelope Reference — canonical-to-Meta transformation, enhanced-conversion hashing, test events.

Want this built for you?

Skip the kit. We'll wire it.

20 minutes. Tell us what you're building, hear what we'd ship in the next 90 days. No pitch deck.

Book the call