Tabby is a CLI tool I built to simplify API testing and basic stress testing, without relying on heavy GUIs or complex scripts.
Repository: <a href="https://github.com/nhdfr/tabby" target="_blank" rel="noopener nofollow">https://github.com/nhdfr/tabby</a>
<hr>
<h3>Why Tabby when curl and Postman already exist?</h3>
Both curl and Postman are excellent tools, but they start to feel limiting when you need:
<ul>
<li>Repeated requests or basic stress testing without writing scripts</li>
<li>Random and customizable data generation for every request</li>
<li>Fast iteration directly from the terminal</li>
</ul>
With curl, looping and dynamic payloads usually require shell scripts. 
With Postman, workflows are GUI-bound and harder to automate.
Tabby is designed to sit in between—CLI-first, but purpose-built for testing.
<hr>
<h3>What Tabby focuses on</h3>
<ul>
<li>
Loop mode 
Send the same request multiple times with configurable delays, useful for basic load and stress testing.
</li>
<li>
Random data generation 
Use placeholders like <code>{{name}}</code>, <code>{{email}}</code>, <code>{{uuid}}</code>, etc., and Tabby generates realistic values automatically.
</li>
<li>
Custom payloads and headers 
Full control over request bodies and headers without additional tooling.
</li>
<li>
No UI lock-in 
Everything runs from the terminal and works well in scripts or CI workflows.
</li>
</ul>
<hr>
<h3>Playground</h3>
Tabby also includes a playground to make command generation easier: 
<a href="https://tabby.nhdfr.foo/playground" target="_blank" rel="noopener nofollow">https://tabby.nhdfr.foo/playground</a>
Typical workflow:
<ol>
<li>Open the playground</li>
<li>Build a POST request</li>
<li>Generate the CLI command</li>
<li>Paste it into your terminal</li>
<li>Run it</li>
</ol>
You can also skip the playground entirely and write commands directly—both approaches are fully supported.
<hr>
<h3>Motivation</h3>
The goal was to create something that is:
<ul>
<li>Faster to iterate with than Postman</li>
<li>Cleaner than maintaining curl scripts</li>
<li>Flexible enough for real-world API testing scenarios</li>
</ul>
Tabby is intentionally lightweight and focused on doing one thing well.
<hr>
If you need help using the tool or have feedback, feel free to reach out on 
X: <a href="https://www.x.com/nhdfrrr" target="_blank" rel="noopener nofollow">https://www.x.com/nhdfrrr</a> 
or open a discussion: <a href="https://github.com/nhdfr/tabby/discussions" target="_blank" rel="noopener nofollow">https://github.com/nhdfr/tabby/discussions</a>
<a href="https://github.com/nhdfr/tabby" target="_blank" rel="noopener nofollow">https://github.com/nhdfr/tabby</a>

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Developer's Club 

Tabby is a lightweight CLI tool designed for API testing and basic stress testing, positioned between curl and Postman. It supports loop mode for repeated requests, random data generation using placeholders like {{name}} and {{email}}, and custom payloads/headers. A web playground is available to help generate CLI commands. The tool is designed for terminal-first workflows and CI integration without GUI dependency.

Tabby: A CLI Tool for API Stress Testing