Fingerprint — Node (Server API)

Integrate the Fingerprint Server API into a Node/Express backend: take the single-use event_id your frontend sends, fetch the event server-side, and read the verified identification and Smart Signals. The server is the source of truth — never trust a visitor_id or a decision sent straight from the client.

Docs: https://docs.fingerprint.com/reference/node-server-sdk · event schema: OpenAPI (https://github.com/fingerprintjs/fingerprint-pro-server-api-openapi) or the Fingerprint MCP event-schema resource.

Package

@fingerprint/node-sdk — install the latest version.

Env var

• FINGERPRINT_SECRET_API_KEY — the secret key. Server-side only; never sent to the browser.

Steps

1. Install @fingerprint/node-sdk.