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mcp/harbor
Claude Desktop

MailFixture for Claude Desktop

com.mailfixture/mailfixture

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.

client:Claude Desktop transport:streamable-http

Install MailFixture in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json 

{
  "mcpServers": {
    "mailfixture": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mailfixture.com/mcp"
      ]
    }
  }
}

Claude Desktop has no remote transport in its config file, so this bridges through mcp-remote. Restart the app after saving. Claude Desktop docs

MailFixture in other clients

MailFixture MCP server