Snapchat Conversions API (v3), server-side.
Deduplicates against the browser snaptr('track', …, {event_id}) through a
shared event_id. The v3 payload mirrors Meta's closely — hashed match keys
as arrays, custom_data, action_source — with WEB upper-cased and event
names in SCREAMING_SNAKE_CASE.
Credentials
%{pixel_id: "…", access_token: "…"}From Snapchat Ads Manager → Events Manager → Conversions API.
The taxonomy is smaller than the others
Snapchat has no separate registration event, so :lead and
:complete_registration both map to SIGN_UP. That is Snapchat's vocabulary
rather than a copy-paste: their reporting genuinely does not distinguish the
two.