Light, fluffy, and always free - The AWS Local Emulator alternative
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A tool for mocking HTTP services
- wiremock
- json
- mocking
- stubbing
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
- oas
- prism
- mocking
- api-testing
An in memory postgres DB instance for your unit tests
- hacktoberfest
- pg-promise
- typeorm
- node-postgres
The easy mocking library for .NET
- mocking
- fake-objects
- dotnet
- dotnet-core
A collection of utilities for creating/testing/experimenting with service workers.
- service-worker
JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.
- pact
- consumer-driven-contracts
- contract-testing
- hacktoberfest
Free, open-source AWS emulator. LocalStack alternative: 107 services, 7,657 operations, true 100% Smithy conformance (258,545/258,545 variants pass). No account, no auth token, no paid tier.
Aioresponses is a helper for mock/fake web requests in python aiohttp package.
Fake JSON Server is a Fake REST API that can be used as a Back End for prototyping or as a template for a CRUD Back End.
- csharp
- webapi
- dotnet-core
- dynamic
Shift-left API Integration | Auto-fix integration drift before integration. Specmatic turns API specifications into executable contracts, continuously verifying that every change made by AI coding agents and engineers stays true to the desired behaviour. Ship AI-ready APIs 10x faster, from intent to implementation, with Spec-Driven API Development.
- contract-testing
- microservices
- contract-driven-development
- cdd
🐵 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
- csharp
- mock-server
- roslyn
- faker
A Open Source Mocking framework for Delphi XE2 or later
- delphi
- mocking-framework
- dpmpackage
:dash: Simple yet powerful file-based mock server with recording abilities
HTTP mock for Golang: record and replay HTTP/HTTPS interactions for offline testing
Simplify software testing, by easily mocking any system using HTTP/HTTPS, allowing a team to test and develop against a service that is not complete or is unstable or just to reproduce planned/edge cases.
SMTP mock server written on Golang. Mimic any 📤 SMTP server behavior for your test environment with fake SMTP server.
- smtp
- smtp-mock
- smtp-server
- smtp-mail
netDumbster is a .Net Fake SMTP Server clone of the popular Dumbster
- c-sharp
- unit-testing
- smtp
- smtp-server
Mock an SSH server and define all commands it supports (Python, Twisted)