Lightweight service virtualization/ API simulation / API mocking tool for developers and testers
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.
Scriptable, multipurpose mock server. Run standalone mock servers, or embed mocks within your tests or CI/CD pipeline.
🐵 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
NEI 接口管理平台 源代码
Manage and start the mock servers on your local platform easily
Connect middleware that creates mocks for REST APIs
The open-source, cross-platform API test and design tool.
Mockbin by Zuplo. Mock, Test, and View HTTP Requests and Responses
Simple and efficient HTTP and Webscoket mock server with specification in yaml, edn or OpenAPI
This Angular library contains several projects: forms, api-mock, contenteditable.
Record & replay API responses for Playwright E2E tests — SSR proxy + browser HAR + WebSockets. Deterministic CI, no backend, no manual mocks.
Dynamic API, S3 & Mail mocking for web, mobile & microservice development.
Open-Source HTTP Interceptor & Mocking Tool
Intercept & mock http requests issued by XMLHttpRequest, fetch, nodejs https/http module, axios, jquery, superagent, ky, node-fetch, request, got or any other request libraries by intercepting XMLHttpRequest, fetch and nodejs native requests at low level.
Library to mock local data requests using Fetch or XHR
Multi-EDR & SIEM mock server. SentinelOne, CrowdStrike, Defender, Elastic, Cortex XDR, Splunk, M365 and Sentinel — 8 platforms in one process. Real API paths, real auth, deterministic seed data, fault injection, scenario engine, SPL parser. GitHub Action + one-click Render deploy. BSL-1.1
🔌 Simple library to manipulate HTTP requests/responses and capture network logs made by the browser using selenium tests without using any proxies
A local emulator for enterprise SaaS APIs — Slack, Gmail, Google Drive, GitHub, Jira, Notion, S3 and more — with the real response shapes, pagination, auth and per-document ACLs, over a corpus you supply.
Backend not ready? No problem. Helix is a zero-config AI mock server that generates realistic, dynamic data for any endpoint you hit.
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