To access your API Key and Campaign Name to your GetResponse account you'll have to go to their support article https://www.getresponse.com/help/where-do-i-find-the-api-key.html
Once you have your API Key and Campaign Name, you're ready to connect your OSP account. Do not move on to the next step until you have completed the above.
- Log in to Online Sales Pro. On the right hand side, click Manage Account and then on Autoresponders.
- Click on GetResponse from the icons of the third-party autoresponders on the left.
- Enter your GetResponse API Key and GetResponse Campaign Name.
- Click the Integrate button to save.