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

# Ironclad (Client Credentials) - How do I link my account?

# Overview

To authenticate with Ironclad using Client Credentials, you will need:

1. **Subdomain** - Your Ironclad environment (e.g. `na1`, `eu1`, `demo`)
2. **Client ID** - From your Ironclad OAuth application
3. **Client Secret** - From your Ironclad OAuth application (shown once at creation)
4. **User Email** - The email of the Ironclad user on whose behalf API requests are made

This guide will walk you through finding each of these values.

### Prerequisites

* You must have access to **Company Settings** in Ironclad, which requires the API add-on to be enabled for your instance.

### Instructions

#### Step 1: Find your subdomain

Your subdomain is the environment prefix in your Ironclad URL:

| Environment   | Subdomain |
| ------------- | --------- |
| North America | `na1`     |
| Europe        | `eu1`     |
| Demo          | `demo`    |

For example, if your Ironclad URL is `https://na1.ironcladapp.com`, your subdomain is `na1`.

#### Step 2: Register an OAuth client application

1. Click on your user profile dropdown at the top right-hand corner and select **Company Settings**.
2. Select the **API** tab in the left sidebar.
3. Click **Create new app**.
4. Enter a name for the OAuth application (e.g. `Nango Client Credentials`) and click **Create app**.
5. Copy the **Client Secret** displayed — it will not be shown again.

#### Step 3: Configure the application

After closing the modal, fill in the client application details:

1. Under **Grant Types**, ensure **Client Credentials** is checked.
2. Under **Requested Resource Scopes**, add the scopes your integration requires. These can be found in the Ironclad API documentation for each endpoint.
3. Click **Save Changes**.
4. Copy the **Client ID** from the application settings.

#### Step 4: Enter credentials in the Connect UI

1. Open the form where you need to authenticate with Ironclad.
2. Enter your **Subdomain**, **Client ID**, **Client Secret**, and the **User Email** on whose behalf API requests will be made.
3. Submit the form.

You are now connected to Ironclad.

***