Reference API
Interprits reference into more easily parsed format
Example...
The Reference API is designed to catch common abbreviations (gn, ex, gen, exo) common variations (1jo, I Jo, Cant) and even misspellings (gnesis, phillipians)
Verse API
Returns passage based on reference values
Example...
The Verse API return the verse or verses in the translation designated that matches the reference requested.
Verse w/Strong's API
Returns passage with Strong's number noted, based on reference values
Example...
Here we've only rendered the number as a tooltip showing the number. The actual definition can be applied via embedded html or ajax calls, from the number using the Strong's API