British National Bibliography
HTTP CORS ? Free
Books
API Endpoint
http://bnb.data.bl.uk/More Books APIs
Do not worry about managing the multiple versions of the Bible
HTTPS No CORS apiKey
Open Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/Hindi
HTTPS CORS apiKey
Bhagavad Gita text
HTTPS CORS OAuth