---
schema_version: "1"
id: c56cc2fccf25028f0e9e4896dcd9f56c191f547c60e6113333465c88a9d2116f
title: Create an API Integration in Legacy Packages
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/marketing-cloud/guides/mc-app-development/create-integration-legacy.md
canonical_url: https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/create-integration-legacy.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 8ad657cee29527bdf191b5198b5fc3c98520e94d1dc6bccd39dad3f9d19512bf
products:
  - Marketing Cloud Engagement APIs and Programmatic Languages
  - Marketing Cloud
---
# Create an API Integration in Legacy Packages

**note:** The ability to create legacy packages was deprecated in August 2019. All new packages are enhanced packages.

1. Navigate to an existing legacy package.

2. Under Components, click **Add Component**.

3. Select **API Integration**.

4. Assign the appropriate scope for your integration.

   - **Perform server-to-server requests** is automatically selected for all API Integrations.
   - If this package contains an app, select **Perform requests on behalf of the user**.
   - Select the scope for your API calls. Assign only the scope your package needs.

5. Save the component.

## Related Items

- [Installed Packages Scope](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/data-access-permissions.md)
- [Your Subdomain and Your Tenant's Endpoints](https://developer.salesforce.com/docs/marketing/marketing-cloud/mc-apis/your-subdomain-tenant-specific-endpoints.md)