Postio — UK Address, Postcode, Email & Phone Validation
Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.
Install
Run one of the commands below, then add the client config underneath.
npmnpx -y @postio/mcp
Client configuration
Paste into Claude Desktop, Cursor (mcp.json), VS Code or any MCP client, then restart the client.
mcpServers{
"mcpServers": {
"postcode-address-validation": {
"command": "npx",
"args": [
"-y",
"@postio/mcp"
]
}
}
}
About this server
Postio — UK Address, Postcode, Email & Phone Validation is listed in the Communication category of the MCPNav directory. It is distributed as npm and can be loaded by any client that speaks the Model Context Protocol.
Typical uses include giving your assistant scoped access to the corresponding service so it can answer questions and take actions with real data instead of guessing. Always review what a server can access before you enable it — see our MCP security guide.
Frequently asked questions
What is the Postio — UK Address, Postcode, Email & Phone Validation MCP server?
Postio — UK Address, Postcode, Email & Phone Validation is an MCP server by uk. Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.
How do I install Postio — UK Address, Postcode, Email & Phone Validation?
Install it with: npx -y @postio/mcp. Then add the JSON config to your client's MCP settings and restart the client.
Is Postio — UK Address, Postcode, Email & Phone Validation free to use?
The MCP server itself is free to install. The source is public on https://github.com/postio-uk/postio-integrations. Any third-party API it calls (such as a search or maps API) may require its own key and billing.
Which clients support Postio — UK Address, Postcode, Email & Phone Validation?
Any MCP-compatible client can use it, including Claude Desktop, Cursor, VS Code, Windsurf and custom agents.