Postio — UK Address, Postcode, Email & Phone Validation MCP Server

by co-postio Your server? Claim it

local only

Postio — UK Address, Postcode, Email & Phone Validation runs on your own machine — the client starts it, so there is no endpoint to ping. 67 installs a week from npm. Last commit 14 Aug 2026.

Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.

Installs per day peak 133 · avg 15 · -27% w/w

a month agotoday

Installs / week

npm · @postio/mcp

Stars

0 open issues

14 Aug 2026

Last commit

0 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check Postio — UK Address, Postcode, Email & Phone Validation every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add postcode-address-validation -- npx -y @postio/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "postcode-address-validation": {
      "args": [
        "-y",
        "@postio/mcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.postcode-address-validation]
command = "npx"
args = ["-y", "@postio/mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "postcode-address-validation": {
      "args": [
        "-y",
        "@postio/mcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "postcode-address-validation": {
      "args": [
        "-y",
        "@postio/mcp"
      ],
      "command": "npx"
    }
  }
}

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Postio — UK Address, Postcode, Email & Phone Validation — questions

Answers built from our own checks of this server.

Why is there no uptime for Postio — UK Address, Postcode, Email & Phone Validation?

Postio — UK Address, Postcode, Email & Phone Validation runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @postio/mcp was installed 67 times last week.

How do I connect Postio — UK Address, Postcode, Email & Phone Validation?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @postio/mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Postio — UK Address, Postcode, Email & Phone Validation?

The npm package @postio/mcp was installed 67 times in the last week. Week over week that is -27%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Postio — UK Address, Postcode, Email & Phone Validation open source?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.