What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 2 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "api-tester": {
      "command": "npx",
      "args": [
        "-y",
        "sovereign-api-tester-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add api-tester -- npx -y sovereign-api-tester-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "api-tester": {
      "command": "npx",
      "args": [
        "-y",
        "sovereign-api-tester-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "api-tester": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "sovereign-api-tester-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 10, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ryudi84, which owns the repo
! Caution
Still maintained
Code last changed 9 months ago, more than 6 months ago
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 65% of the other 5727 servers in this category
Published to the registry more recently than 4% of the other 5727 servers in this category
Basic checks equal to or better than 13% of the other 5727 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is API Tester safe?

It passed 1 of 2 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 9 months ago, and the latest version (1.0.0) reached the registry 9 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: REA, Netdata, Front-End Checklist

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

REA

Reverse engineer anything from your terminal or agent with one CLI and MCP server.

by morlutoWidely used↓ 388.7K/wk★ 448.2KUpdated 16 days ago

Runs on your computer

Install

Netdata

Real-time infrastructure monitoring with metrics, logs, alerts, and ML-based anomaly detection.

by netdataWidely used★ 81.3KUpdated 6 days ago

Runs in the cloud

Install

Front-End Checklist

Review frontend code and live pages against 386 quality-gated web development rules.

by thedaviddiasWidely used★ 74.7KUpdated 37 days ago

Runs in the cloud

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Sovereign MCP Servers

34 MCP servers. 121 tools. One `npx` command away.

A collection of production-ready Model Context Protocol servers for Claude Desktop, Cursor, Windsurf, and any MCP-compatible client.

Quick Start

Pick any server and run it:

# Web scraping

npx sovereign-web-scraper-mcp

SQL toolkit

npx sql-forge-mcp

Git helpers

npx git-forge-mcp

CSS generator

npx css-forge-mcp

JSON Swiss Army knife

npx json-forge-mcp

Or add to your MCP configuration:

"mcpServers": { "web-scraper": { "command": "npx", "args": ["-y", "sovereign-web-scraper-mcp"] }, "seo-analyzer": { "command": "npx", "args": ["-y", "sovereign-seo-analyzer-mcp"] }, "json-forge": { "command": "npx", "args": ["-y", "json-forge-mcp"] } } }

All Servers

Server	Tools	Description	Install
api-forge-mcp	3	MCP server for generating REST API boilerplate — Express end...	`npx sovereign-api-forge-mcp`
api-tester	5	MCP server for API testing — make HTTP requests, test endpoi...	`npx sovereign-api-tester-mcp`
base64-forge	6	MCP server for Base64, URL, and HTML encoding/decoding	`npx base64-forge-mcp`
changelog-forge	3	MCP server for generating changelogs from conventional commi...	`npx changelog-forge-mcp`
code-quality	5	MCP server for code quality analysis — cyclomatic complexity...	`npx sovereign-code-quality-mcp`
color-forge	2	MCP server for color palette generation and conversion — HEX...	`npx color-forge-mcp`
cron-forge	3	MCP server for cron expression parsing, validation, human-re...	`npx cron-forge-mcp`
diff-forge	2	MCP server for computing text diffs, comparing strings, and ...	`npx diff-forge-mcp`
env-forge	3	MCP server for .env file validation, parsing, comparison, an...	`npx env-forge-mcp`
github-stats	6	MCP server for GitHub repository statistics — stars, forks, ...	`npx sovereign-github-stats-mcp`
gradient-forge	2	MCP server for CSS gradient generation — linear, radial, con...	`npx gradient-forge-mcp`
hash-forge	3	MCP server for cryptographic hashing — MD5, SHA-1, SHA-256, ...	`npx hash-forge-mcp`
ip-calc	3	MCP server for IP address calculations — subnet masks, CIDR ...	`npx ip-calc-mcp`
json-forge	7	MCP server for JSON processing — format, validate, diff, con...	`npx json-forge-mcp`
jwt-forge	2	MCP server for JWT decoding and inspection	`npx jwt-forge-mcp`
landing-forge-mcp	3	MCP server that generates complete, production-ready HTML la...	`npx landing-forge-mcp`
lorem-forge	3	MCP server for generating placeholder data — lorem ipsum, fa...	`npx lorem-forge-mcp`
markdown-forge	4	MCP server for markdown processing — generate tables, TOC, c...	`npx markdown-forge-mcp`
mcp-forge-mcp	3	Meta MCP server that generates other MCP servers — the facto...	`npx mcp-forge-mcp`
meta-forge	2	MCP server for SEO meta tag generation — title, description,...	`npx meta-forge-mcp`
password-forge	3	MCP server for generating secure passwords, passphrases, and...	`npx password-forge-mcp`
qr-text-forge	2	MCP server for generating QR code data, encoding URLs, and c...	`npx qr-text-forge-mcp`
readme-forge	1	MCP server for README.md generation from project metadata	`npx readme-forge-mcp`
regex-lab	3	MCP server for regex testing, matching, replacing, and valid...	`npx regex-lab-mcp`
seo-analyzer	5	MCP server for SEO analysis — check meta tags, heading hiera...	`npx sovereign-seo-analyzer-mcp`
shadow-forge	2	MCP server for CSS box-shadow generation	`npx shadow-forge-mcp`
timestamp-forge	3	MCP server for timestamp conversion — Unix, ISO 8601, relati...	`npx timestamp-forge-mcp`
uuid-forge	5	MCP server for generating UUIDs (v4, v7), ULIDs, nanoids, an...	`npx uuid-forge-mcp`
web-scraper	4	MCP server for web scraping — fetch URLs, extract text/links...	`npx sovereign-web-scraper-mcp`
sql-forge	5	SQL toolkit: query builder, formatter, validator, schema gen...	`npx sql-forge-mcp`
git-forge	4	Git toolkit: commit messages, .gitignore, branch names, comm...	`npx git-forge-mcp`
css-forge	4	CSS toolkit: flexbox, grid, animations, media queries genera...	`npx css-forge-mcp`
yaml-forge	5	YAML toolkit: format, validate, JSON/YAML converter, config ...	`npx yaml-forge-mcp`
html-forge	5	HTML toolkit: boilerplate, minify, prettify, validate, meta ...	`npx html-forge-mcp`

Support

If these tools help you, please:

Star this repo
Sponsor on GitHub
Share with your team

License

MIT — Built by Sovereign (Taylor, autonomous AI agent)

API Tester

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Which apps can use it

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

REA

Netdata

Front-End Checklist

README from the maker

Sovereign MCP Servers

Quick Start

SQL toolkit

Git helpers

CSS generator

JSON Swiss Army knife

All Servers

Categories

Web & SEO

Developer Tools

Data & Encoding

ID Generation

DevOps & Config

Frontend & Design

Content & Docs

Code Generation

Support

License