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Alternatives

Products that do what V1.1.0 DuffMan – Fuzzer and Lightweight CLI Client for Postman does

New major update of DuffMan tool. Now it can act as lightweight CLI Postman Client. Features from previous release: - Parse collection and environment files - Fuzz GET parameters - Fuzz form parameters - Fuzz multipart parameters - Fuzz path parameters - Fuzz JSON bodies - Filter output by response status code - Filter output by response time

  1. 1DF

    The tool allows to parse and fuzz all API Endpoints defined within a Postman Collections. It is created to help Security and Software Engineers to test and catch not properly handled errors.

    2024 · github.com

  2. 2
    Postman182

    Postman is a powerful HTTP client to test REST API

    2014

  3. 3
    Pingy CLI140

    The simple frontend build tool. No config. No plugins

    2017

  4. 4LO

    2017 · postmancollections.com

  5. 5OF
  6. 6

    Biggest Library of ready-made API Collections for Postman

    2018

  7. 7
    Xplorer103

    A Secure, 100% Local API Client

    Nov 2025

  8. 8
    Postcode105

    VSCode extension alternative to Postman

    2021

  9. 9AS

    There are plenty of good tools for load testing such as JMeter, Minigun, and plenty more - but they all have their own set of options to learn. I built this one to support a simpler workflow where you just paste your curl request (or other cli command) after your `spam` config (literally just `spam -r 2 -- curl www.google.com). It's pretty barebones but I'm 100% going to use it in my day to day - figured I'd share it here if it helped anyone else!

    2023 · github.com

  10. 10VF

    Hey HN, I wanted to build something real in Zig, and I was annoyed that Postman needed an account and an internet connection just to send a GET request. So I figured I'd make something I would actually use. It kind of snowballed from there. 50,000+ lines later, it does requests, test assertions, collections, environments, CI/CD reports, import/export, and has a browser-based Web UI (`volt ui`). All in a single binary with zero external dependencies. Some numbers: - Binary size: ~4 MB (Postman: ~500 MB) - Startup: 42ms (Postman: 3-8 seconds) - RAM idle: ~5 MB (Postman: 300-800 MB) -…

    Mar 2026 · github.com

  11. 11BO
  12. 12KY

    Hey HN! I wanted to practice "vibe coding" and see how far and fast I can go by only prompting, without actual coding. I decided to make a simple CLI app that scrapes web docs into a single md file (I was annoyed that LLM keeps writing Tailwind 3 code for a Tailwind 4 project). In just a couple of hours, the CLI app was ready! Then iterated on arguments for another couple of hours. Result: https://github.com/vladstudio/web2llm Then I decided to go further and "productize" the CLI by making a web app for it. Another half-day, and the web app is ready!…

    2025 · web2llm.dev

  13. 13JJ
  14. 14SO

    Hey everyone! I’ve developed a few tools that I wanted to share with the community: https://clipush.deno.dev A simple way to send web push notifications using cURL, making the process much easier to integrate into your workflow. (An experiment for personal usage.) https://request-bin.deno.dev A tool that acts as a real-time HTTP request debugger with SSE logging to track and analyze requests efficiently. (Created after requestb.in introduced limits on free accounts. Personally used for testing webhooks.) https://lock-states.deno.dev A service to manage lock…

    2024

  15. 15EA
  16. 16OS

    Mar 2026 · github.com

  17. 17AS

    Hi, this is my first npm package that is getting a couple of hundreds downloads. It's a super simple CLI time tracker, mostly suitable for 9 to 5 jobs I hope you check it out and tell me what you think. Demo and etc. https://github.com/omidfi/moro

    2017

  18. 18NT

    I built a CLI tool that turns codebases and PRs into diagrams so you can quickly understand how things fit together. Originally made it because I couldn't follow my own AI-generated repos. Just shipped a big update: - Switched from D2 to Mermaid for rendering - Tree-sitter AST parsing + agentic flow instead of raw LLM calls. ~50x faster. - Works on any GitHub repo or PR, not just local - Dropped the web frontend, it's just a CLI now - Published as a pip package Still a ton to improve and I'm building fast. Feedback, issues, PRs all welcome.

    Feb 2026 · github.com

  19. 19NA
  20. 20PR

    Hi HN, While building RAG agents, I noticed a lot of token budget was wasted on formatting overhead (HTML tags, JSON structure, whitespace). Existing solutions felt too heavy (often requiring torch&#x2F;transformers), so I wrote this lightweight, zero-dependency library to solve it. It includes strategies for context packing, PII redaction, and tool output compression. Benchmarks show it can save ~15% of tokens with negligible latency overhead (<0.5ms). Happy to answer any questions!

    Dec 2025 · github.com

  21. 21
    Nib2

    A tiny, native Postman alternative for macOS

    Aug 2026 · nib.jaspnerd.dev

  22. 22LF

    We built a no&#x2F;low-code tool that lets you spin up MCPs from a single prompt. MCPs give LLMs access to tools, data, and actions—but they’re hard to build and deploy. Our tool abstracts that: describe what you want, and it auto-generates and hosts the necessary components. No UI flows, no manual chaining—just prompt and go. Examples: • Pull email, parse a DocSend, check Reddit, draft reply • Extract data from a niche site + send a Slack alert • Combine tools without writing glue code Live demo: https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=4uCiaQrgfoE Built over a weekend after getting…

    2025 · generatemcp.com

  23. 23FA

    Hi, Please check out my new library funcy. It's really simplified AWS Lambda APIs in my projects, so I thought I would open-source it. It strongly-types all request parameters, has support for CORS, content-negotiation, security headers, etc.. out of the box and works via a very simply declarative interface with progressive disclosure. It's currently pre-release, let me know what you think :)

    2024 · github.com

  24. 24FA

    2016 · mail.python.org

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