Genome Nexus aggregates variant annotation from various sources. There are two types:
- 2.Larger annotation sources are pulled on the fly from other APIs and cached in the mongo database.
For a list of all supported variant annotation sources see this Google Sheet:
The code for the backend can be found here: https://github.com/genome-nexus/genome-nexus.
The frontend of the website is here: https://github.com/genome-nexus/genome-nexus-frontend.