Amazon allows API integration to be valid for only one year. You will get several email notifications from Amazon before your Cahoot-Amazon integration expires. In this case, you can go to Seller Central and simply renewing your API credentials.
For a video tutorial on the entire process, please watch this video:
Step by Step Guide
1. Navigate to App & Services > Manage Your Apps.
2. Click Renew and confirm new expiration date.
3. Go to Authorization Token View page.
4. Copy the Seller ID and MWS Auth Token into our secure form and then click Submit.