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SpectoLabs / hoverfly

Lightweight service virtualization/ API simulation / API mocking tool for developers and testers

testing go golang http https rest-api proxy mitm mocking stubbing testing-tools api-simulation service-virtualization hoverfly api-mock api-mocking

Updated Nov 13, 2026
Go

Kong / insomnia-mockbin

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Insomnia Mockbin is the underlying backend for the API mocks capability of Insomnia. It is built and used by Kong, the author of the open-source Kong Gateway.

api-management api-client mocking apis testing-tools api-test api-testing api-mock

Updated Nov 4, 2026
JavaScript

imposter-project / imposter

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Scriptable, multipurpose mock server. Run standalone mock servers, or embed mocks within your tests or CI/CD pipeline.

mock protobuf rest-api soap mock-server swagger grpc openapi hbase salesforce api-mock mock-responses

Updated Oct 26, 2026
Shell

natenho / Mockaco

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🐵 HTTP mock server, useful to stub services and simulate dynamic API responses, leveraging ASP.NET Core features, built-in fake data generation and pure C# scripting