fourzerotwo MCP

An official MCP server providing access to over 400 data APIs for AI agents, including UK companies, property, trade, tenders, and sanctions. It implements the x402 payment protocol, allowing agents to pay per call via USDC or card without needing an account.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-18Operated by fourzerotwo

MCP endpoint (Streamable HTTP)

https://fourzerotwo.si/mcp

Vendor documentation

What you can do with it

Search and retrieve UK company data via Companies House
Screen entities against UK and US sanctions lists
Lookup UK postcodes and calculate distances
Search for EU tenders and public notices

Tools advertised by the last live check:

search_apis
list_apis
call_api

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http fourzerotwo-mcp https://fourzerotwo.si/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add fourzerotwo-mcp --url https://fourzerotwo.si/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable fourzerotwo-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "fourzerotwo-mcp": {
      "url": "https://fourzerotwo.si/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "fourzerotwo-mcp": {
      "type": "streamableHttp",
      "url": "https://fourzerotwo.si/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start fourzerotwo-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "fourzerotwo-mcp": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http fourzerotwo-mcp https://fourzerotwo.si/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "fourzerotwo-mcp": {
      "url": "https://fourzerotwo.si/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "fourzerotwo-mcp": {
      "serverUrl": "https://fourzerotwo.si/mcp"
    }
  }
}

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