On Confluence Cloud, Admins must create an Application Link before users can start using Meetical.
Confluence Cloud currently does not offer APIs to automatically create Application Links. For Confluence Server the Application Link will be automatically created when the Meetical App is installed or enabled.
This mechanism will allow that your individual users to grant secure access to the Confluence API, and let Meetical create and update pages. The same mechanism is used to connect Jira with Confluence and other Atlassian products.
Before you continue, you should have successfully installed the Meetical for Confluence Cloud App from the Atlassian Marketplace. We recommend to install the App before setting up the Application Link.
This should take no more than 2 Minutes. Let's get started.
Application Name: Meetical
Consumer Key: meetical-consumer-key
Public Key:
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7bfEC/2qWZHvzcx7ZJdYF5U30iZOZB7cC+M7WKvk3t1xLBDXZqHOkWrW4qij33cLk1eOm7TQ1P3mt1nRGLe3aTsCoZRpUyApEyewf08cTdigJatw18n7g/tLVbaKc2ciIsq5dG5hvFzWWANK5PJxkfFRKg2i6Y8rpwJh8u7htjH4tOMEiMef8biGbGyiT8jzZUfGCXESHgnySw35EIuXFrFj298FP9XtX/L4Hri1jnodXKmqy92YbbRDzsh3NrBL37Anzs9iRjOmc1bNZB4vRNDO1uL+XWS6ubCatisJzWCyNbAPKRzTmvNqdDRtnmhsfUDetZzVuC0dPhwJv0HrrQIDAQAB
Video
Follow this Video to create the Application Link
Alternatively, here are the steps documented as screen shots....
1. Go to Settings
Depending if you already got the new navigation experience or not you find your Confluence admin settings as follows:

New Navigation Experience in Confluence

Settings in the old navigation experience
2. Scroll down to Application Links

3. Create new link
Use https://www.meetical.io as link address and click "create new link".

4. Click continue

You can safely ignore the warning that no response was received and continue.
5. Input Generic Application Parameters

- Input "Meetical" as Application Name.
- Keep "Generic Application" as Type.
- Check the "Create incoming link" checkbox.
- Leave all other values blank.
- Click "Continue".
6. Add incoming link details

Consumer Key: meetical-consumer-key
Consumer Name: Meetical
Public Key:
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7bfEC/2qWZHvzcx7ZJdYF5U30iZOZB7cC+M7WKvk3t1xLBDXZqHOkWrW4qij33cLk1eOm7TQ1P3mt1nRGLe3aTsCoZRpUyApEyewf08cTdigJatw18n7g/tLVbaKc2ciIsq5dG5hvFzWWANK5PJxkfFRKg2i6Y8rpwJh8u7htjH4tOMEiMef8biGbGyiT8jzZUfGCXESHgnySw35EIuXFrFj298FP9XtX/L4Hri1jnodXKmqy92YbbRDzsh3NrBL37Anzs9iRjOmc1bNZB4vRNDO1uL+XWS6ubCatisJzWCyNbAPKRzTmvNqdDRtnmhsfUDetZzVuC0dPhwJv0HrrQIDAQAB
7. Hurray, Application Link successfully created

Well done. Application Link setup finished.
Please note, if you delete the Application Link all OAuth grants from your users given to Meetical are invalidated. If you install the Link Again, users need to grant access again. If you decide to stop using Meetical, please delete the App Link for security reasons.