Fingerprint — Tagging events with your data (v4)

Maps to the dashboard "Tag an event with your data" Get Started step. Tagging attaches your own context (user/account/order IDs, a plan name, a flow name) to an identification event so you can join Fingerprint's visitor_id and signals with your business data — in the Server API, in webhooks, and in dashboard search.

Note the client→server name change: you send tag in the client getData(...) call, but it comes back on the server event as event.tags (plural). linkedId → event.linked_id.

Two tools

• tag — arbitrary JSON metadata stored on the event (e.g. { userId, orderId, action }). Use it to label what the user was doing when identified.
• linkedId — a string that groups related events under one identifier (e.g. a session id or a user id). Use it to follow one entity across many events and to query them together.

Where it goes

Pass both when you identify, on the client. With the v4 React/Vue/Svelte/Angular SDKs the identify call accepts them: