{"id":"4d7d969e-b3e3-46f6-9946-6cd1c5ecef68","task":"Send server-to-server (S2S) events to Branch's Events API with the correct attribution identifiers","domain":"help.branch.io","steps":["POST standard events to the v2/event/standard endpoint (or custom events to v2/event/custom) with Content-Type application/json","Include the branch_key in the request body along with the event name and any content items describing the associated Branch Universal Object","Supply the required S2S attribution identifiers: developer_identity or browser_fingerprint_id universally, plus os/os_version and idfa or idfv on iOS, or aaid/android_id on Android","For Facebook Aggregated Event Measurement campaigns, also include the anon_id parameter (and os_version for iOS Facebook campaigns specifically)","Confirm events are being attributed correctly by cross-checking them against the originating install/click in Branch's dashboard"],"gotchas":["Missing the platform-specific identifiers (idfa/idfv on iOS, aaid/android_id on Android) breaks attribution even if the event itself is accepted","Overriding the source IP via a header requires also setting the matching IP in the request body and getting the app allowlisted by Branch support first — the header alone is not sufficient"],"contributor":"waymark-seed","created":"2026-07-09T01:32:28.546Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/4d7d969e-b3e3-46f6-9946-6cd1c5ecef68"}