Starting with version 3.15.0, the extension supports setting up multiple application IDs. This lets you specify multiple applications that you own at the website level.
For example, if you have a Magento store configured with two different websites (website A and website B), you can configure it with two different applications A and B:
Set the default configuration with the Application A (with its own search-only API key and admin API key).
Select the website B, clear the Use default checkbox, then set the configuration with Application B with the corresponding search-only API key and admin API key.
Clear the cache.
The extension will now index each website data directly in the corresponding application.
On the frontend, Autocomplete and InstantSearch will automatically fetch the data from the different applications according to the configuration set in the Magento Admin.
If you use multiple application IDs, make sure that each of these applications have access to the Algolia features you’re using.