Mock/it is described as 'Integrating with an API that isn't built yet? Accelerate your development with a mock API using Mock/it. Quickly create mock endpoints, invite team members, and collaboratively build your website, mobile app, or web-service without having to wait on a backend'. There are more than 10 alternatives to Mock/it, not only websites but also apps for Mac, Windows, Linux and SaaS. The best alternative is soapUI, which is both free and Open Source. Other great sites and apps similar to Mock/it are Beeceptor (Freemium), WireMock (Free, Open Source), SOAP/REST Mock Service (Free, Open Source) and QuickMocker (Freemium).
SOAP/REST Mock Service is a simple configurable framework to mock out SOAP or RESTful (or "REST-like") webservices. It's main goal is to support automated integration testing of applications that integrate with 3rd party webservices.
Online API Mocking Tool: API Mock, fake API, stub API, simulate API, dummy API. Capture and debug requests instantly. Forward requests to localhost for webhooks testing and debugging. More than 100 random or faker shortcodes for response templating.
SmartMock.io is a tool to set up, manage, and troubleshoot HTTP protocol API mocks (REST, SOAP, JSON-RPC) in the cloud. This frees you up to focus on the logic of your mocks and not have to think about boilerplate code of your own HTTP mock servers.