> ## 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.

# Sellsy (Client Credentials)

> Connect to the Sellsy API using client credentials in 2 minutes 💨

> [tab] 🚀 Quickstart
>
> **1. Create an integration**
>
> Sign up for a free Nango account ([here](https://app.nango.dev)) if you haven't already. Then navigate to [Integrations](https://app.nango.dev/dev/integrations) -> *Configure New Integration* -> select *Sellsy*.
>
> **2. Authorize Sellsy (Client Credentials)**
>
> Go to [Connections](https://app.nango.dev/dev/connections) -> *Add Test Connection* -> *Authorize*, then enter your Sellsy **Client Id** and **Secret shopper**. Later, you'll let your users do the same directly from your app.
>
> **3. Call the Sellsy API**
>
> Let's make your first request to Sellsy (fetch a list of contacts). Replace the placeholders below with your [Environment API key](https://nango.dev/docs/reference/backend/http-api/api-keys.md), [integration ID](https://app.nango.dev/dev/integrations), and [connection ID](https://app.nango.dev/dev/connections):
>
> > [tab] cURL
> >
> > ```bash theme={null}
> > curl -X GET "https://api.nango.dev/proxy/v2/contacts" \
> >   -H "Authorization: Bearer <NANGO-API-KEY>" \
> >   -H "Provider-Config-Key: <INTEGRATION-ID>" \
> >   -H "Connection-Id: <CONNECTION-ID>" \
> >   -H "Accept: application/json"
> > ```
>
> > [tab] Node
> >
> > Install Nango's backend SDK: `npm i @nangohq/node`. Then run:
> >
> > ```typescript theme={null}
> > import { Nango } from '@nangohq/node';
> >
> > const nango = new Nango({ apiKey: '<NANGO-API-KEY>' });
> >
> > // Fetch a list of contacts from Sellsy
> > const res = await nango.get({
> >   endpoint: '/v2/contacts',
> >   providerConfigKey: '<INTEGRATION-ID>',
> >   connectionId: '<CONNECTION-ID>'
> > });
> >
> > console.log(res.data);
> > ```
>
> You can also fetch credentials dynamically via 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.
>
> > [!TIP]
> >
> > Next step: [Embed the auth flow](https://nango.dev/docs/guides/primitives/auth.md) in your app to let your users connect their Sellsy accounts.

> [tab] 🔗 Useful links
>
> | Topic | Links |
> | - | - |
> | Authorization | [Guide to connect to Sellsy (Client Credentials) using Connect UI](https://nango.dev/docs/integrations/all/sellsy-oauth2-cc/connect) |
> | General | [Sellsy Website](https://sellsy.com/) |
> | Developer | [Sellsy API Documentation](https://docs.sellsy.com/api/v2/) |
> | | [API Authentication](https://docs.sellsy.com/api/v2/#section/Authentication) |
> | | [Generate your client Credentials](https://www.sellsy.com/developer/api-v2) |
> | | [API Versioning](https://docs.sellsy.com/api/v2/#section/Versioning) |
> | | [Rate limiting](https://docs.sellsy.com/api/v2/#section/Quotas) |
> | | [API Access Types](https://help.sellsy.com/fr/articles/5876615-types-d-acces-api) |
>
> > [!NOTE]
> >
> > Contribute useful links by [editing this page](https://github.com/nangohq/nango/tree/master/docs/integrations/all/sellsy-oauth2-cc.mdx)

> [tab] 🚨 API gotchas
>
> *None yet, add yours!*
>
> > [!NOTE]
> >
> > Contribute API gotchas by [editing this page](https://github.com/nangohq/nango/tree/master/docs/integrations/all/sellsy-oauth2-cc.mdx)

> [!NOTE]
>
> Questions? Join us in the [Slack community](https://nango.dev/slack).


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