# Fingerprint Server API Node.js SDK
[Fingerprint](https://fingerprint.com) is a device intelligence platform offering 99.5% accurate visitor identification.
The Fingerprint Server Node SDK is an easy way to interact with the Fingerprint [Server API](https://dev.fingerprint.com/reference/pro-server-api) from your Node application. You can retrieve visitor history or individual identification events.
## Requirements
TypeScript support:
- TypeScript 4.5.5 or higher
Supported runtimes:
- Node.js 18 LTS or higher (we support all [Node LTS releases before end-of-life](https://nodejs.dev/en/about/releases/)).
- Deno and Bun might work but are not actively tested.
- "Edge" runtimes might work with some modifications but are not actively tested. See "edge" runtimes compatibility
This SDK can be made compatible with JavaScript "edge" runtimes that do not support all Node APIs, for example, [Vercel Edge Runtime](https://edge-runtime.vercel.app/), or [Cloudflare Workers](https://developers.cloudflare.com/workers/).
To make it work, replace the SDK's built-in `fetch` function (which relies on Node APIs) with the runtime's native `fetch` function. Pass the function into the constructor with proper binding:
```js
const client = new FingerprintJsServerApiClient({
region: Region.EU,
apiKey: apiKey,
fetch: fetch.bind(globalThis),
})
```
## How to install
Install the package using your favorite package manager:
- NPM:
```sh
npm i @fingerprintjs/fingerprintjs-pro-server-api
```
- Yarn:
```sh
yarn add @fingerprintjs/fingerprintjs-pro-server-api
```
- pnpm:
```sh
pnpm i @fingerprintjs/fingerprintjs-pro-server-api
```
## Getting started
Initialize the client instance and use it to make API requests. You need to specify your Fingerprint [Secret API key](https://dev.fingerprint.com/docs/quick-start-guide#server-api-and-smart-signals) and the region of your Fingerprint application.
```ts
import {
FingerprintJsServerApiClient,
Region,
} from '@fingerprintjs/fingerprintjs-pro-server-api'
const client = new FingerprintJsServerApiClient({
apiKey: '',
region: Region.Global,
})
// Get visit history of a specific visitor
client.getVisitorHistory('').then((visitorHistory) => {
console.log(visitorHistory)
})
// Get a specific identification event
client.getEvent('').then((event) => {
console.log(event)
})
```
See the [Examples](https://github.com/fingerprintjs/fingerprintjs-pro-server-api-node-sdk/tree/main/example) folder for more detailed examples.
### Error handling
The Server API methods like `getEvent` and `getVisitorHistory` can throw `EventError` and `VisitorsError`.
You can use the provided `isVisitorsError` and `isEventError` type guards to narrow down error types:
```typescript
import {
isVisitorsError,
isEventError,
FingerprintJsServerApiClient,
} from '@fingerprintjs/fingerprintjs-pro-server-api'
const client = new FingerprintJsServerApiClient({
apiKey: '',
region: Region.Global,
})
// Handling getEvent errors
try {
const event = await client.getEvent(requestId)
console.log(JSON.stringify(event, null, 2))
} catch (error) {
if (isEventError(error)) {
console.log(error.responseBody) // Access parsed response body
console.log(error.response) // You can also access the raw response
console.log(`error ${error.statusCode}: `, error.message)
} else {
console.log('unknown error: ', error)
}
}
// Handling getVisitorHistory errors
try {
const visitorHistory = await client.getVisitorHistory(visitorId, {
limit: 10,
})
console.log(JSON.stringify(visitorHistory, null, 2))
} catch (error) {
if (isVisitorsError(error)) {
console.log(error.status, error.error)
if (error.status === 429) {
retryLater(error.retryAfter) // Needs to be implemented on your side
}
} else {
console.error('unknown error: ', error)
}
// You can also check for specific error instance
// if(error instanceof VisitorsError403) {
// Handle 403 error...
// }
}
```
You can also check for specific error instance:
```typescript
import {
isVisitorsError,
isEventError,
FingerprintJsServerApiClient,
VisitorsError429,
} from '@fingerprintjs/fingerprintjs-pro-server-api'
const client = new FingerprintJsServerApiClient({
apiKey: '',
region: Region.Global,
})
// Handling getEvent errors
try {
const event = await client.getEvent(requestId)
console.log(JSON.stringify(event, null, 2))
} catch (error) {
if (isEventError(error)) {
console.log(error.responseBody) // Access parsed response body
console.log(error.response) // You can also access the raw response
console.log(`error ${error.statusCode}: `, error.message)
} else {
console.log('unknown error: ', error)
}
}
try {
const visitorHistory = await client.getVisitorHistory(visitorId, {
limit: 10,
})
console.log(JSON.stringify(visitorHistory, null, 2))
} catch (error) {
if (error instanceof VisitorsError429) {
retryLater(error.retryAfter) // Needs to be implemented on your side
}
throw error
}
```
### Webhooks
#### Webhook types
When handling [Webhooks](https://dev.fingerprint.com/docs/webhooks) coming from Fingerprint, you can cast the payload as the built-in `VisitWebhook` type:
```ts
import { VisitWebhook } from '@fingerprintjs/fingerprintjs-pro-server-api'
const visit = visitWebhookBody as unknown as VisitWebhook
```
#### Webhook signature validation
Customers on the Enterprise plan can enable [Webhook signatures](https://dev.fingerprint.com/docs/webhooks-security) to cryptographically verify the authenticity of incoming webhooks.
This SDK provides a utility method for verifying the HMAC signature of the incoming webhook request.
To learn more, see [example/validateWebhookSignature.mjs](example/validateWebhookSignature.mjs) or read the [API Reference](https://fingerprintjs.github.io/fingerprintjs-pro-server-api-node-sdk/functions/isValidWebhookSignature.html).
### Sealed results
Customers on the Enterprise plan can enable [Sealed results](https://dev.fingerprint.com/docs/sealed-client-results) to receive the full device intelligence result on the client and unseal it on the server. This SDK provides utility methods for decoding sealed results.
To learn more, see [example/unsealResult.mjs](https://github.com/fingerprintjs/fingerprintjs-pro-server-api-node-sdk/tree/main/example/unsealResult.mjs) or the [API Reference](https://fingerprintjs.github.io/fingerprintjs-pro-server-api-node-sdk/functions/unsealEventsResponse.html).
### Deleting visitor data
Customers on the Enterprise plan can [Delete all data associated with a specific visitor](https://dev.fingerprint.com/reference/deletevisitordata) to comply with privacy regulations. See [example/deleteVisitor.mjs](https://github.com/fingerprintjs/fingerprintjs-pro-server-api-node-sdk/tree/main/example/deleteVisitor.mjs) or the [API Reference](https://fingerprintjs.github.io/fingerprintjs-pro-server-api-node-sdk/classes/FingerprintJsServerApiClient.html#deleteVisitorData).
## API Reference
See the full [API reference](https://fingerprintjs.github.io/fingerprintjs-pro-server-api-node-sdk/).
## Support and feedback
To report problems, ask questions, or provide feedback, please use [Issues](https://github.com/fingerprintjs/fingerprintjs-pro-server-api-node-sdk/issues). If you need private support, you can email us at [oss-support@fingerprint.com](mailto:oss-support@fingerprint.com).
## License
This project is licensed under the [MIT license](https://github.com/fingerprintjs/fingerprintjs-pro-server-api-node-sdk/tree/main/LICENSE).
