Looking for the mobile recharge offers details sakshamapp offer free api for the mobile recharge offers it is most simple api and yes for now it don’t need any login etc

http://sakshamapp.com/api/offers/?recharge_operator=A&recharge_circle=1&type=3G

Here type can be 2G , 3G , FTT , RMG , SMS , TUP

2G2G
3G3G
FTTFULL TALK TIME
RMGROAMING
TUPTop Up

You will see responses in JSON with complete offers.

Details about the operator code and circle can be found here http://sakshamapp.com/api/operator.json

Kindly understand these API are not always 100% true.