WireMock

WireMock is simulator tool for HTTP based API. It allows you stay test even when an API does not exist or is incomplete. It allows checking of an edge case and failure modes that the real API may not able to produce.

Features:
Robust and power API URL request matching.
Record and Playback tool
Hosted Mock API service. No need to configure servers and set SSL certificates.

More Information and Official Website:
Download link: http://wiremock.org/