Inbox Check — Email Deliverability Test for VS Code

io.github.live-direct-marketing/inbox-check

Email inbox placement tests across Gmail, Outlook, Yahoo, Mail.ru, Yandex (SPF/DKIM/DMARC).

client:VS Code transport:stdio runtime:npm

Install Inbox Check — Email Deliverability Test in VS Code

.vscode/mcp.json

{
  "inputs": [
    {
      "type": "promptString",
      "id": "inbox-check-api-key",
      "description": "INBOX_CHECK_API_KEY",
      "password": true
    },
    {
      "type": "promptString",
      "id": "inbox-check-base-url",
      "description": "INBOX_CHECK_BASE_URL",
      "password": true
    }
  ],
  "servers": {
    "inbox-check": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "ldm-inbox-check-mcp"
      ],
      "env": {
        "INBOX_CHECK_API_KEY": "${input:inbox-check-api-key}",
        "INBOX_CHECK_BASE_URL": "${input:inbox-check-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

Inbox Check — Email Deliverability Test in other clients

Inbox Check — Email Deliverability Test MCP server