1) Yes you can include it as the default or optional search engine.
2) We used to have an add URL page but a significant proportion of the submissions were spam. We will look into ways genuine submissions could be accepted as lots of people have asked for this.
2) We used to have an add URL page but a significant proportion of the submissions were spam. We will look into ways genuine submissions could be accepted as lots of people have asked for this.
3) We do, docs can be found at: https://www.mojeek.com/support/api/search/