Find and Use an API - Deleting an API subscription

You can delete your subscription to an API by following these steps:

Select the My subscriptions tab within the top navigation menu on the Homepage. This will show you the My subscriptions page with a list of all your subscriptions including detail.
Select the Manage subscriptions link. This will show you the API subscriptions page.
Select the Delete link next to the subscription name for the relevant API environment. This will show you the Delete API subscription page.
Select the Delete subscription button to delete that subscription. Or the Return to subscription link to cancel.

Alternatively:

Select the My subscriptions tab within the top navigation menu on the Homepage. This will show you the My subscriptions page with a list of all your subscriptions including detail.
Select the Manage subscriptions link. This will show you the API subscriptions page.
Select the View link next to the API subscription. This will show you the API subscription detail page.
Select the Delete link next to the API subscription. This will show you the Delete API subscription page.
Select the Delete subscription button to delete that subscription. Or the Return to subscription link to cancel.

Once the subscription is deleted, any existing integrations using the subscription will be denied access immediately. You will also lose both the Primary and Secondary keys associated with that subscription and the OAuth Client ID relating to for Native OAuth Application-flow. This cannot be reversed, so make sure you want to delete the subscription.