> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Connect BigChange with OAuth 2.0 (Client Credentials) – StackOne Hub

> Link a BigChange account in the StackOne Hub using OAuth 2.0 (Client Credentials). End-user guide to authorize the integration and start using BigChange actions.

> [!WARNING]
>
> Each API key is created for one BigChange customer account. Generate a new key per account you link — do not reuse one key across multiple accounts.

## Create an API Key

Generate an API key in the BigChange Developer Portal to obtain the credentials for this account.

**1. Sign in to the Developer Portal**

Sign in to the [BigChange Developer Portal](https://developers.bigchange.com/) and open **API Key Management**.

**2. Create a new key**

Select **Create new API Key** and give it a descriptive name.

**3. Copy your credentials**

The page displays the **Client ID**, **Client Secret**, and the numeric **Customer ID** for this account.

<ul>
  <li>Copy the **Client ID** and **Client Secret** now — the secret is only shown once.</li>
  <li>Copy the **Customer ID** shown in the page description.</li>
  <li>Paste the Client ID, Client Secret, and Customer ID into the matching StackOne linked-account fields, then save and test the connection.</li>
</ul>

## Link the Account

**1. Connect**

<ul>
  <li>Click **Connect**.</li>
  <li>If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider's authorization flow.</li>
  <li>Once authorization is successful, you will see a confirmation popup.</li>
</ul>

**2. Use Actions**

Connect an AI platform to the linked account's actions. See [AI Platforms](https://docs.stackone.com/connect/ai-platforms/overview.md).

Other ways to call actions are listed in [Protocols & SDKs](https://docs.stackone.com/connect/protocols-and-sdks.md).


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