[horse]

I need to obtain drug-protein interaction data for me website. For example, for aspirin I need to find how strongly it binds to COX1 and whatever other enzymes and proteins it binds to. Or for the MAOI-A gene, I need to get the binding constants for various MAO inhibitors and inducers. I found this site:
https://www.bindingdb.org/bind/index.jsp

but their API isn't working so I don't know if I can use it.

[Yggdrasil]

You could try PubChem: https://pubchem.ncbi.nlm.nih.gov/

[Babcock_Hall]

https://www.brenda-enzymes.org
BRENDA is sometimes useful as a database.