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

uk.co.postio/postcode-address-validation

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

client:VS Code transport:stdio runtime:npm

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

.vscode/mcp.json

{
  "inputs": [
    {
      "type": "promptString",
      "id": "postio-api-key",
      "description": "POSTIO_API_KEY",
      "password": true
    },
    {
      "type": "promptString",
      "id": "postio-base-url",
      "description": "POSTIO_BASE_URL",
      "password": true
    }
  ],
  "servers": {
    "postcode-address-validation": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@postio/mcp"
      ],
      "env": {
        "POSTIO_API_KEY": "${input:postio-api-key}",
        "POSTIO_BASE_URL": "${input:postio-base-url}"
      }
    }
  }
}

VS Code prompts for each input the first time the server starts, so no secret is written to the file. VS Code docs

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