> ## 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 💨

<Tabs>
  <Tab title="🚀 Quickstart">
    <Steps>
      <Step title="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*.
      </Step>

      <Step title="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.
      </Step>

      <Step title="Call the Sellsy API">
        Let's make your first request to Sellsy (fetch a list of contacts). Replace the placeholders below with your [Nango 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):

        <Tabs>
          <Tab title="cURL">
            ```bash theme={null}
            curl -X GET "https://api.nango.dev/proxy/v2/contacts" \
              -H "Authorization: Bearer <NANGO-SECRET-KEY>" \
              -H "Provider-Config-Key: <INTEGRATION-ID>" \
              -H "Connection-Id: <CONNECTION-ID>" \
              -H "Accept: application/json"
            ```
          </Tab>

          <Tab title="Node">
            Install Nango's backend SDK: `npm i @nangohq/node`. Then run:

            ```typescript theme={null}
            import { Nango } from '@nangohq/node';

            const nango = new Nango({ secretKey: '<NANGO-SECRET-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);
            ```
          </Tab>
        </Tabs>

        You can also fetch credentials dynamically via the [Node SDK](/reference/sdks/node#get-a-connection-with-credentials) or [API](/reference/api/connection/get).
      </Step>
    </Steps>

    ✅ 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](/guides/primitives/auth) in your app to let your users connect their Sellsy accounts.
    </Tip>
  </Tab>

  <Tab title="🔗 Useful links">
    | Topic         | Links                                                                                                          |
    | ------------- | -------------------------------------------------------------------------------------------------------------- |
    | Authorization | [Guide to connect to Sellsy (Client Credentials) using Connect UI](/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)</Note>
  </Tab>

  <Tab title="🚨 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>
  </Tab>
</Tabs>

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