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EmptyInbox

Official registry Productivity

Zero-config disposable email inboxes for AI agents: create, read mail, await verify codes.

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package emptyinbox-mcp
Claude Code 
claude mcp add emptyinbox -e 'EMPTYINBOX_API_KEY=<your emptyinbox_api_key>' -- npx -y emptyinbox-mcp@1.5.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "emptyinbox": {
            "command": "npx",
            "args": [
                "-y",
                "emptyinbox-mcp@1.5.0"
            ],
            "env": {
                "EMPTYINBOX_API_KEY": "<your emptyinbox_api_key>"
            }
        }
    }
}

Environment variables

  • EMPTYINBOX_API_KEY secret Existing EmptyInbox API key. Omit to auto-register a free account on the first tool call that needs one; the key is then written to ~/.emptyinbox.json.

Frequently asked questions

What is EmptyInbox?

Zero-config disposable email inboxes for AI agents: create, read mail, await verify codes.

How do I install EmptyInbox?

It runs on your machine. In Claude Code: claude mcp add emptyinbox -e 'EMPTYINBOX_API_KEY=<your emptyinbox_api_key>' -- npx -y emptyinbox-mcp@1.5.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does EmptyInbox need an API key?

Yes. It expects EMPTYINBOX_API_KEY, which you set in its configuration.

Is EmptyInbox open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains EmptyInbox?

It is published by blockonomics. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.