MCP server - Drin

The Drin MCP server (@drin/mcp) exposes the whole API as 54 tools over the Model Context Protocol. Any MCP client — Claude Desktop, Claude Code, Cursor, or your own agent — can send and receive email, manage domains and inboxes, and read metrics with a single API key.

Run it

The server speaks MCP over stdio. It needs one environment variable, DRIN_API_KEY:

DRIN_API_KEY=drin_xxx npx -y @drin/mcp

Variable	Required	Purpose
`DRIN_API_KEY`	Yes	Your API key (Bearer credential).
`DRIN_SENDER`	Account-wide keys	Default project external id (the `X-Drin-Product` value).
`DRIN_BASE_URL`	No	Override the API origin. Defaults to `https://api.drin.run`.

Already using the CLI? It bundles the same server — npx @drin/cli mcp is equivalent to running @drin/mcp directly.

Add it to a client

{
  "mcpServers": {
    "drin": {
      "command": "npx",
      "args": ["-y", "@drin/mcp"],
      "env": { "DRIN_API_KEY": "drin_xxx" }
    }
  }
}

Restart the client and your agent can call tools like send_email, list_threads, and reply_email.

What the agent can do

The 54 tools cover every surface of the API:

Group	Tools	Examples
Sending	3	`send_email`, `send_batch`, `reply_email`
Reading messages	4	`list_emails`, `get_email`, `get_email_body`, `list_email_attachments`
Domains	7	`add_domain`, `verify_domain`, `set_domain_receiving`, `delete_domain`
Inboxes & threads	7	`create_inbox`, `list_threads`, `get_thread`, `simulate_inbound`
Contacts	7	`create_contact`, `unsubscribe_contact`, `resubscribe_contact`
Templates	8	`create_template`, `render_template`, `list_template_gallery`
Suppressions	3	`list_suppressions`, `add_suppression`, `remove_suppression`
Webhooks	5	`create_webhook`, `update_webhook`, `delete_webhook`
API keys	3	`list_api_keys`, `create_api_key`, `revoke_api_key`
Metrics & account	2	`get_metrics`, `list_account_messages`
Integrations	5	`install_integration`, `list_integrations`, `uninstall_integration`

The MCP server acts with the full authority of the API key you give it. Scope the key to a single project where you can, and prefer a key with only the access the agent actually needs.

Prefer a CLI?

Every tool is also a command — npx @drin/cli send … --json.

Documentation Index

​Run it

​Add it to a client

​What the agent can do

Prefer a CLI?

Run it

Add it to a client

What the agent can do