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#api-testing (20 Repositories)

Ranked open-source repositories tagged with #api-testing, scored by pull request acceptance likelihood and maintainer engagement velocity.

Topic Avg Merge Rate

42.8%

Avg Review Latency

68.1h

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20 repositories tagged #api-testing

B TierGo 97

mockzilla/mockzilla

Open-source OpenAPI mock server with cloud hosting and local modes for development, testing, and CI. Generates realistic API responses from specs with latency simulation, error injection, proxy fallback, and request validation. Validated against 2,200+ real-world OpenAPI specs.

96.9%
Merge Rate
<1h
First Review
100%
1st-Timers
1
Maintainers
B TierPython 3.6k

schemathesis/schemathesis

Catch API bugs before your users do

96.7%
Merge Rate
14d
First Review
100%
1st-Timers
1
Maintainers
B TierGo 1.9k

unkn0wn-root/resterm

Terminal API client for HTTP, GraphQL and gRPC. Plain .http files you can diff and version, with workflows, mocks, profiling, tracing, OpenAPI import, SSH tunnels, Kubernetes port-forwards, WebSocket, SSE and a CLI runner.

96.3%
Merge Rate
10d
First Review
100%
1st-Timers
0
Maintainers
A TierC# 822

dotnet/dev-proxy

Simulate API failures, throttling, and chaos — all from your command line.

89.1%
Merge Rate
9d
First Review
67%
1st-Timers
4
Maintainers
B TierGo 18.4k 14 GFIs

keploy/keploy

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

60.1%
Merge Rate
7d
First Review
52%
1st-Timers
22
Maintainers
B TierJavaScript 907

ServeRest/ServeRest

APIs REST simulando loja virtual para servir de estudo de testes de API de forma manual ou automatizada

60.0%
Merge Rate
<1h
First Review
0%
1st-Timers
3
Maintainers
B TierTypeScript 5.0k

stoplightio/prism

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

57.1%
Merge Rate
11h
First Review
33%
1st-Timers
1
Maintainers
B TierKotlin 774

WebFuzzing/EvoMaster

The first open-source AI-driven tool for automatically generating system-level test cases (also known as fuzzing) for web/enterprise applications. Currently targeting whitebox and blackbox testing of Web APIs, like REST, GraphQL and RPC (e.g., gRPC and Thrift).

75.0%
Merge Rate
6d
First Review
53%
1st-Timers
15
Maintainers
B TierJavaScript 21.6k

MobSF/Mobile-Security-Framework-MobSF

Mobile Security Framework (MobSF) is an automated, all-in-one mobile application (Android/iOS/Windows) pen-testing, malware analysis and security assessment framework capable of performing static and dynamic analysis.

64.7%
Merge Rate
15h
First Review
67%
1st-Timers
5
Maintainers
B TierJavaScript 46.6k 1 GFIs

usebruno/bruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

54.7%
Merge Rate
3d
First Review
34%
1st-Timers
83
Maintainers
B TierJava 2.0k 2 GFIs

microcks/microcks

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

54.7%
Merge Rate
3d
First Review
44%
1st-Timers
30
Maintainers
B TierPython 119

buer2233/ai-api-test-skill

AI接口自动化测试 Skill:面向 Python + pytest + requests,驱动 Codex / Claude Code 生成、维护和调试接口用例(AI API test automation skill for Python + pytest + requests)

0.0%
Merge Rate
-
First Review
0%
1st-Timers
0
Maintainers
B TierRust 8.0k

ducaale/xh

Friendly and fast tool for sending HTTP requests

25.0%
Merge Rate
5h
First Review
0%
1st-Timers
1
Maintainers
C TierTypeScript 80.1k

hoppscotch/hoppscotch

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

25.8%
Merge Rate
3d
First Review
20%
1st-Timers
78
Maintainers
D TierTypeScript 5.9k

cypress-io/cypress-realworld-app

A payment application to demonstrate real-world usage of Cypress testing methods, patterns, and workflows.

0.0%
Merge Rate
<1h
First Review
0%
1st-Timers
2
Maintainers
D TierElixir 999

PSPDFKit-labs/bypass

Bypass provides a quick way to create a custom plug that can be put in place instead of an actual HTTP server to return prebaked responses to client requests.

0.0%
Merge Rate
21h
First Review
0%
1st-Timers
1
Maintainers
D TierTypeScript 613

serenity-js/serenity-js

A TypeScript-native acceptance testing framework that gives your Playwright Test, WebdriverIO, or Cucumber test suite the architecture it needs to scale.

0.0%
Merge Rate
-
First Review
0%
1st-Timers
0
Maintainers
D TierPython 348

baikaishuipp/jcci

Java code commit impact, java code change impact analysis,java代码改动影响范围分析工具,精准测试,回归测试范围划定

0.0%
Merge Rate
-
First Review
0%
1st-Timers
0
Maintainers
D TierTypeScript 298

postmanlabs/postman-mcp-server

Postman MCP Server — connect AI agents (Claude Code, Cursor, VS Code Copilot, Gemini CLI) to your Postman collections, OpenAPI specs, and environments via Model Context Protocol (MCP)

0.0%
Merge Rate
-
First Review
0%
1st-Timers
0
Maintainers
D TierJava 558

arextest/arex-agent-java

Lightweight Java agent for traffic capture and replay, enhancing testing and debugging.

0.0%
Merge Rate
-
First Review
0%
1st-Timers
0
Maintainers
Best Api-testing Open Source Repositories & C-Rank™ | GetMerged