fourzerotwo

Name: fourzerotwo
Author: fourzerotwo.si

by fourzerotwo.siversion 1.2.1i★ –iRuns in the cloud

Registry namesi.fourzerotwo/data

How to install

Overview

Description from the maker (original English)

400+ data APIs for agents: UK companies, property, trade, tenders, recalls, sanctions. Free tier

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 in the cloud
Transport: Streamable HTTP
Category: Law & government data
You need to fill in: X-API-Key

Install

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

Passed 2/3 checks · What you ask goes through the maker’s server (fourzerotwo.si)

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude · about 5 min

You need a fourzerotwo key (sign up on the maker’s site, may cost money) · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1

Sign up and create a fourzerotwo key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the fourzerotwo site ↗
Done
Open Claude’s Connectors page
CustomizeConnectors
Done
Click “+ Add” → “Add custom connector” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · Namefourzerotwo
Remote MCP server URL · Addresshttps://fourzerotwo.si/mcp
Under Request headers, add this name and value
Header nameX-API-Key
Value<paste your key here>
Paste the key only into the app’s field, never into a chat or to anyone
Leave Authentication as Claude detected it, then click Add
Done
Turn it on in a chat
+Connectorsfourzerotwo
Done
Try it
Use fourzerotwo and tell me what you can do for me, then show me one thing
✓ If Claude says it is using fourzerotwo or shows a fourzerotwo tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect fourzerotwo yet

fourzerotwo needs your own key to connect, but OpenAI’s help page only describes OAuth sign-in; there is no key option we could verify

What you can do instead

A · Use an app that can connect fourzerotwo

Steps for Claude →You need a fourzerotwo key (sign up on the maker’s site, may cost money) · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1
Steps for Claude Code →You need a fourzerotwo key (sign up on the maker’s site, may cost money)
Steps for Cursor →You need a fourzerotwo key (sign up on the maker’s site, may cost money)
Steps for VS Code →You need a fourzerotwo key (sign up on the maker’s site, may cost money)

B · Others in Law & government data that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Global law✓ ChatGPT
Tw Legal Rag✓ ChatGPT
Open Legal Data (Germany)✓ ChatGPT

Works with Claude Code · about 5 min

You need a fourzerotwo key (sign up on the maker’s site, may cost money)

Sign up and create a fourzerotwo key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the fourzerotwo site ↗
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
3
Paste this command and press Enter
```
claude mcp add --transport http data https://fourzerotwo.si/mcp --header 'X-API-Key: your-value'
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see fourzerotwo listed as connected
Done
Try it
Use fourzerotwo and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using fourzerotwo or shows a fourzerotwo tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor · about 5 min

You need a fourzerotwo key (sign up on the maker’s site, may cost money)

Sign up and create a fourzerotwo key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the fourzerotwo site ↗
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the fourzerotwo settings, X-API-Key is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use fourzerotwo and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using fourzerotwo or shows a fourzerotwo tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code · about 5 min

You need a fourzerotwo key (sign up on the maker’s site, may cost money)

Sign up and create a fourzerotwo key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the fourzerotwo site ↗
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the fourzerotwo settings, X-API-Key is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use fourzerotwo and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using fourzerotwo or shows a fourzerotwo tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

Address for apps that connect over the web

Addresshttps://fourzerotwo.si/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use fourzerotwo💬 Discussion →

For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http data https://fourzerotwo.si/mcp --header 'X-API-Key: your-value'

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "data": {
      "url": "https://fourzerotwo.si/mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "data": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Values you fill in

X-API-Key secret HTTP header
Optional free key from https://fourzerotwo.si/free (raises the free allowance from 100 to 500 calls/day)

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

At a glance

GitHub stars i: –
Downloads per weeki: Not on npm/PyPI
Verified domain: ✓ fourzerotwo.si
Licence i: No licence stated
Connection: Runs in the cloud
Transport: streamable-http
Latest versioni: 1.2.1
Categoryi: Law & government data
Published to registryi: Oct 12, 2026
Code last changedi: –
Maker: fourzerotwo.si
Repo: –
Website: fourzerotwo.si
Registry status: Active

Which apps can use it

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

Connect over the internet 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 Open WebUI Raycast

All apps, with pros and cons →

What it can do

Tool names and descriptions exactly as the server reported them on Nov 8, 2026. The maker wrote them, not us; we show them as plain text.

search_apis
Find the right data endpoint for a task. Searches 500+ endpoints (UK legislation, Companies House, property prices, sanctions lists, vehicle tax, weather, earthquakes, arXiv/PubMed/Crossref papers, IP geolocation, GB electricity, ONS/World Bank/ECB economics, and more) by keyword
list_apis
Overview of every API group in the catalog: name, category, summary, number of endpoints and whether it has a free tier. Always free to call. Use it to browse; use search_apis to find a specific endpoint.
call_api
Run one endpoint by the tool name that search_apis returned, with that endpoint's parameters, and get its data back as JSON (with source and licence attribution). Endpoints with free_tier "free" or "sample" cost nothing within the daily allowance (100 calls/day anonymously, 500 w

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 11, 2026

! Caution
Maker matches the repo
The registry lists no source repo, so we cannot match the publisher (fourzerotwo.si) to the code
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
✓ Pass
Endpoint responds
Responded in 532 ms (HTTP 200)
– Not applicable
Sign-in with OAuth
No sign-in needed
✓ Pass
No hidden instructions in tool descriptions
Read 3 tool descriptions and found no hidden instructions to the AI

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Law & government datai

More stars than 0% of the other 1807 servers in this category
Published to the registry more recently than 50% of the other 1807 servers in this category
Basic checks equal to or better than 44% of the other 1807 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 fourzerotwo safe?

It passed 2 of 3 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?

You need to fill in: X-API-Key

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.2.1) reached the registry 31 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT Business and above.

What can I use instead?

In the same category: Korean Law MCP, Global law, Tw Legal Rag

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

Korean Law MCP

Korean law: statutes, precedents, ordinances, treaties and citation verification (법제처 API).

by chrisryugjWidely used★ 2.9KUpdated 8 days ago

Runs in the cloud

Install

Global law

The law of nearly every country on earth, any date: read it, see what changed it, check citations.

by lexifinaGrowing★ 1.9KUpdated yesterday

Runs in the cloud✓ lexifina.com

Install

Tw Legal Rag

Taiwan law MCP server: 22M court judgments, statutes, agency rulings, with citation checks

by aa0101181514Growing★ 346Updated today

Runs in the cloud

Install

README from the maker

No README found in the repo

fourzerotwo

Overview

What you can do with it

Install

Sign up and create a fourzerotwo key

Open Claude’s Connectors page

Click “+ Add” → “Add custom connector” and fill in these 2 fields

Turn it on in a chat

Try it

What you can do instead

Sign up and create a fourzerotwo key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Sign up and create a fourzerotwo key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Sign up and create a fourzerotwo key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Over the web

Values you fill in

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Law & government datai

Common questions

Alternatives

Korean Law MCP

Global law

Tw Legal Rag

README from the maker