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Top 12 JavaScript api-testing Projects
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Project mention: Deep Dive: How Bruno 1.0 Stores API Tests Locally vs. Postman 11.0 Cloud Sync | dev.to | 2026-04-28
After 6 months of benchmarking, case study analysis, and real-world testing, our recommendation is clear: choose Bruno 1.0 if you are an engineering team that values performance, Git integration, and zero vendor lock-in. Our data shows Bruno outperforms Postman 11.0 in every local storage metric: 400ms faster startup for 1000+ test suites, 6x lower storage overhead per test, and zero sync latency. The case study above shows teams can save $2k+ per year in licensing costs and $18k+ per year in engineering time by switching to Bruno. For teams with heavy non-technical collaboration needs, or very small test suites (<100 tests), Postman 11.0’s free tier remains a viable option, but we recommend exporting collections to Bruno for all engineering use cases. The API testing landscape is shifting toward local-first tools to avoid cloud vendor lock-in, and Bruno 1.0 is leading that charge. Try Bruno today: download it from https://github.com/usebruno/bruno, and migrate your Postman collections in minutes using the native import tool.
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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.
Project mention: Mobile-Security-Framework-MobSF VS exodus - a user suggested alternative | libhunt.com/r/Mobile-Security-Framework-MobSF | 2025-07-12 -
Project mention: Backend Basics for Frontend Engineers: Dive into SQL and APIs with Node.js | dev.to | 2026-05-30
One underappreciated skill for frontend engineers learning backend work is getting comfortable testing APIs directly — without building a UI first. Tools like Postman or the VS Code extension Thunder Client let you fire off HTTP requests to your local server and inspect the responses in seconds. Even the terminal works:
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pythagora
Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.
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ServeRest
APIs REST simulando loja virtual para servir de estudo de testes de API de forma manual ou automatizada
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Gateway or proxy attribution. A reverse proxy in front of the model-provider API records the request, computes the cost, and exposes per-customer breakdowns. Open-source options include Helicone, LiteLLM, Langfuse, and OpenLLMetry. Hosted equivalents serve as the AI cost observability layer for teams that want centralized visibility: LangSmith, Datadog LLM Observability, Arize Phoenix. Adds a network hop. Centralizes instrumentation across a fleet of services.
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tech-courses-search-engine
A real-time tech course finder, created using Elasticsearch, Python, React+Redux, Docker, and Kubernetes.
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Two-Go
Zero-dependency fluent API and service testing for Node.js: chainable HTTP, rich assertions, soft assertions, polling, snapshots, sessions, faker and a utility belt, plus an optional AI layer (test generation, failure explanation, bug review and fuzzing) and an MCP server so agents can drive it.
Project mention: Let your AI agent test your API: two-go's AI layer and MCP server | dev.to | 2026-06-02
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
JavaScript api-testing discussion
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A note from our sponsor - SaaSHub
www.saashub.com | 8 Jun 2026
Index
What are some of the best open-source api-testing projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | bruno | 44,710 |
| 2 | Mobile-Security-Framework-MobSF | 21,139 |
| 3 | Newman | 7,222 |
| 4 | pythagora | 1,821 |
| 5 | ServeRest | 889 |
| 6 | just-api | 814 |
| 7 | pactum | 615 |
| 8 | jest-opentelemetry | 255 |
| 9 | tech-courses-search-engine | 146 |
| 10 | gitlab-cypress | 104 |
| 11 | restful-ecommerce | 44 |
| 12 | Two-Go | 1 |
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