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Claude Code

Postio — UK Address, Postcode, Email & Phone Validation for Claude Code

uk.co.postio/postcode-address-validation

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

client:Claude Code transport:stdio runtime:npm

Install Postio — UK Address, Postcode, Email & Phone Validation in Claude Code

run in your project directory

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

claude mcp add postcode-address-validation -e POSTIO_API_KEY=<POSTIO_API_KEY> -e POSTIO_BASE_URL=<POSTIO_BASE_URL> -- npx -y @postio/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

Postio — UK Address, Postcode, Email & Phone Validation in other clients

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