# Set Up a Multi-Customer Development Environment

`intent: multi-customer`

Use this setup when your app accesses impact.com data on behalf of users.

### Meet the prerequisite

You need a supported runtime, package manager, editor, and impact.com account.

* Runtime: Python 3.8+, Node.js 18+, or PHP 8.1+
* Package manager: `pip`, `npm`, or Composer
* Editor: Visual Studio Code
* impact.com account: Use it to request OAuth 2.0 credentials

### Get your OAuth 2.0 credential

Request your `client_id` and `client_secret`, then register your redirect URI.

Store sensitive values in your secret store or local environment.

* [Set Up OAuth 2.0](/rest-apis/wip-not-used-yet/authenticate/set-up-oauth-2.0.md)

### Set environment variables

```bash
export IMPACT_CLIENT_ID="your-client-id"
export IMPACT_CLIENT_SECRET="your-client-secret"
export IMPACT_REDIRECT_URI="https://your-app.example.com/callback"
```

### Install an SDK

{% tabs %}
{% tab title="Python" %}

```bash
pip install impact
```

{% endtab %}

{% tab title="Node.js" %}

```bash
npm install @impact/sdk
```

{% endtab %}

{% tab title="PHP" %}

```bash
composer require impact/sdk
```

{% endtab %}
{% endtabs %}

### Explore next step

* [Build a Multi-Customer App](/rest-apis/wip-not-used-yet/build-a-multi-customer-app.md)
* [Set Up OAuth 2.0](/rest-apis/wip-not-used-yet/authenticate/set-up-oauth-2.0.md)
* [Sandbox](/developer-tools/sandbox.md)


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