Server API enables you to get more information about visitors (using the /visitors endpoint) or about individual identification events (using the /events endpoint). Server API must be used only from the server side; it was never designed to be and must not be used from the client side (i.e. browsers, mobile devices).

Server API requests are not billed and do not count towards your monthly allowance.

The following Server APIs are available:

  • /events
    • GET a detailed payload for an identification request.
  • /visitors
    • GET the history of visits for a given visitorId.
    • DELETE all data that belongs to a given visitorId.

See Also

  • To identify the browsers that visit your web application, see our documentation for Javascript agent.
  • To identify the mobile devices that use your mobile app, see our documentation for Android and iOS.


The server API is available in the Global, EU and Asia (Mumbai) regions:

RegionBase URLServer Location
EUhttps://eu.api.fpjs.ioFrankfurt, Germany
Asia (Mumbai)https://ap.api.fpjs.ioMumbai, India

Use the Base URL dropdown in the right column of each endpoint to select the correct base URL according to your application's region.


There are 2 ways to authenticate with the API: with auth header or with a query parameter. All unauthenticated requests will return HTTP 403 Forbidden response.

Auth header

This is the recommended way of API authentication. When making an API request, add Auth-API-Key HTTP header with your secret API key.

API key query parameter

This method of authentication is easy to use when you want to test it in the browser. However, we don't recommend using it in production.

Example request with an API key query parameter:

// Paste this URL into your browser
// replace the API key with your real secret API key<<apiKey>>

Server API SDKs

For a smoother developer experience, we offer typed SDKs for these languages:

Pick one of them as the Language on the endpoint page's top right corner to see an example request using that SDK.

The SDKs (and this reference) are based on a Server API OpenAPI schema, which is also available on Github:

Trying it out

You can try calling the Server API directly from this reference:

  1. You are going to need a Secret API Key. You can create one in your Fingerprint Dashboard > App Settings > API Keys.
  2. To make a request, you will need either a visitorId or requestId of an identification event associated with your application. Go to Dashboard > Identification to see your identification events.
  3. Scroll down to one of the endpoints, for example, Get visits by visitorId.
  4. Set Authentication to your secret API key.
  5. Set the visitor_id path parameter to some visitorId from your dashboard (or requestId in the case of Get event by requestId).
  6. Make sure the Base URL corresponds to your application's region.
  7. Click Try it!

A real API response will appear in the Response section. Alternatively, you can view the prepared response examples there.