Metadefender has a lot in common with VirusTotal but includes a few other features.
If used with a full setup users can make use of a self hosted core (like hosting your own VirusTotal), but you can use the free API for general use of the Metadefender cloud.
https://onlinehelp.opswat.com/mdcloud/3._Public_APIs.html
They have an extension which uses the free API for virus checking files https://www.opswat.com/free-tools
The free API for OPSWAT Metadefender would be great, imo. I use it as a source regularly and find it super useful and a good alternative / comparison to VT results
Metadefender has a lot in common with VirusTotal but includes a few other features. If used with a full setup users can make use of a self hosted core (like hosting your own VirusTotal), but you can use the free API for general use of the Metadefender cloud. https://onlinehelp.opswat.com/mdcloud/3._Public_APIs.html They have an extension which uses the free API for virus checking files https://www.opswat.com/free-tools
Does this seem like a good addition ?