> ## 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.

# Back Market

> Integrate your application with the Back Market API

## 🚀 Quickstart

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

**1. Create an integration**

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

**2. Authorize Back Market**

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

**3. Call the Back Market API**

Let's make your first request to the Back Market API (list your listings). 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 "https://api.nango.dev/proxy/ws/listings" \
>   -H "Authorization: Bearer <NANGO-API-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({ apiKey: '<NANGO-API-KEY>' });
>
> const response = await nango.get({
>     endpoint: '/ws/listings',
>     providerConfigKey: '<INTEGRATION-ID>',
>     connectionId: '<CONNECTION-ID>'
> });
>
> console.log(response.data);
> ```

Or 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.

**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.

## 📚 Back Market Integration Guides

Nango-maintained guides for common use cases.

* [How do I link my account?](https://nango.dev/docs/api-integrations/back-market/connect)\
  Connect your Back Market account using the Connect UI

Official docs: [Back Market API Guidelines](https://api.backmarket.dev/)

> [!TIP]
>
> Back Market runs three separate platforms — EU (`backmarket.fr`), US/NA (`backmarket.com`), and AP (`backmarket.co.jp`) — each with its own seller account, API token, and preprod (sandbox) environment. A seller account on one platform or environment cannot authenticate against another.

## ⚙️ Country code and user-agent

The Country Code and User-Agent aren't something Nango asks each seller for — they belong to your app, not to any individual Back Market seller account. Set them once as [connection config defaults](https://nango.dev/docs/reference/backend/http-api/connect/sessions/create.md) instead:

```json theme={null}
{
    "integrations_config_defaults": {
        "back-market": {
            "connection_config": {
                "countryCode": "fr-fr",
                "userAgent": "BM-{CompanyName}-{IntegrationName};contact@yourdomain.com"
            }
        }
    }
}
```

## 🧩 Pre-built syncs & tools for Back Market

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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