Pagination helps you retrieve discrete pages (subset) as opposed to an entire list of items like payments, payment requests, and refunds. This essentially leads to faster response times for the API call.
Currently, the following APIs support pagination:
Get Refunds - List of Refunds
Get Payment-Requests - List of Payment Requests
The various Instamojo wrappers (that make use of v1.1) also supports pagination. You can find the versions that support pagination in the respective Github repositories:
PHP wrapper: Release v0.4 and above.
Ruby wrapper: Release v1.1.2 and above.
Python wrapper: Release v1.2.0 and above.