> ## Documentation Index
> Fetch the complete documentation index at: https://nango.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Factorial (API Key)

> Integrate your application with the Factorial API using API Key authentication

## 🚀 Quickstart

Connect to Factorial with Nango and see data flow in 2 minutes.

**1. Create the integration**

In Nango ([free signup](https://app.nango.dev)), go to [Integrations](https://app.nango.dev/dev/integrations) -> *Configure New Integration* -> *Factorial (API Key)*.

**2. Authorize Factorial**

Go to [Connections](https://app.nango.dev/dev/connections) -> *Add Test Connection* -> *Authorize*, then enter your Factorial API key. Later, you'll let your users do the same directly from your app.

**3. Call the Factorial API**

Let's make your first request to the Factorial API (read the API key's credential info). Replace the placeholders below with your [secret key](https://app.nango.dev/dev/environment-settings), [integration ID](https://app.nango.dev/dev/integrations), and [connection ID](https://app.nango.dev/dev/connections):

> [tab] cURL
>
> ```bash theme={null}
> curl "https://api.nango.dev/proxy/2026-07-01/resources/api_public/credentials" \
>   -H "Authorization: Bearer <NANGO-SECRET-KEY>" \
>   -H "Provider-Config-Key: <INTEGRATION-ID>" \
>   -H "Connection-Id: <CONNECTION-ID>"
> ```

> [tab] Node
>
> Install Nango's backend SDK with `npm i @nangohq/node`. Then run:
>
> ```typescript theme={null}
> import { Nango } from '@nangohq/node';
>
> const nango = new Nango({ secretKey: '<NANGO-SECRET-KEY>' });
>
> const res = await nango.get({
>     endpoint: '/2026-07-01/resources/api_public/credentials',
>     providerConfigKey: '<INTEGRATION-ID>',
>     connectionId: '<CONNECTION-ID>'
> });
>
> console.log(res.data);
> ```

Or fetch credentials with the [Node SDK](https://nango.dev/docs/reference/backend/backend-sdk/node.md#get-a-connection-with-credentials) or [API](https://nango.dev/docs/reference/backend/http-api/connections/get.md).

✅ You're connected! Check the [Logs](https://app.nango.dev/dev/logs) tab in Nango to inspect requests.

**4. Implement Nango in your app**

Follow our [Auth implementation guide](https://nango.dev/docs/guides/primitives/auth.md) to integrate Nango in your app.

## 📚 Factorial (API Key) Integration Guides

Nango-maintained guides for common use cases.

* [How do I link my account?](https://nango.dev/docs/api-integrations/factorial-api-key/connect)
  Connect your Factorial account using the Connect UI

Official docs: [Factorial API reference](https://apidoc.factorialhr.com/reference) | [API Keys guide](https://apidoc.factorialhr.com/docs/api-keys)

> [!NOTE]
>
> Factorial API keys grant full admin access to the entire platform and never expire. They're not tied to any individual user, so generate and store them carefully — see the [setup guide](https://nango.dev/docs/api-integrations/factorial-api-key/connect) for details.
>
> If you'd rather have each company authorize your app via OAuth instead of sharing an admin API key, see the [Factorial (OAuth)](https://nango.dev/docs/integrations/all/factorial.md) integration.

## 🧩 Pre-built syncs & tools for Factorial (API Key)

Explore Nango-provided tools in your dashboard. Extend and customize them to fit your needs.

*No pre-built syncs or tools available yet.*

> [!TIP]
>
> Not seeing the integration you need? [Build your own](https://nango.dev/docs/guides/functions/functions-guide.md) independently.

***


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