dev.mailkite/mail-send

Official

by mailkite · JavaScript

Send transactional email over a verified domain — templates, attachments, custom headers.

Send transactional email from verified domains with templates and attachments.

Topics

mcpmcp-serverai-agentsemailemail-apillm-toolsmailkitemodel-context-protocol

README.md11 KBView on GitHub

<a href="https://mailkite.dev"> <picture> <source media="(prefers-color-scheme: dark)" srcset="https://mailkite.dev/brand/logo-email-dark.png"> <img src="https://mailkite.dev/brand/logo-email.png" alt="MailKite" height="56"> </picture> </a> <h1 align="center">@mailkite/mcp</h1> Email for every product you ship — receive email as a webhook, send over a verified domain, give an AI agent its own inbox. The official <a href="https://mailkite.dev">MailKite</a> library for AI agents (MCP). <a href="https://mailkite.dev/docs">Docs</a> · <a href="https://mailkite.dev/docs/libraries#mcp">Library guide</a> · <a href="https://mailkite.dev">mailkite.dev</a> · <a href="https://mailkite.dev/docs/ai-agents">AI agents</a> <a href="https://www.npmjs.com/package/@mailkite/mcp"><img src="https://img.shields.io/npm/v/@mailkite/mcp?color=2563eb&label=npm" alt="npm"></a>

Read-only mirror. This repo is a generated, release-time mirror of the MailKite monorepo (the private source of truth) — development doesn't happen here. Install from npm and open issues against the MailKite docs.

Install

json

{
  "mcpServers": {
    "mailkite": {
      "command": "npx",
      "args": ["-y", "@mailkite/mcp"],
      "env": { "MAILKITE_API_KEY": "mk_live_…" }
    }
  }
}

Tools

One tool per MailKite API method, generated from the shared contract. Full list + schemas: https://mailkite.dev/docs/libraries#mcp.

40 tools, generated from the shared API contract — the same spec the server registers at startup. * marks a required argument. Access: API key (mk_live_…), session (management token), or local (runs in-process, no network).

Tool	Signature	Access	What it does
`mailkite_send`	`from: string`, `to: any`, `subject: string`, `html: string`, `text: string`, `templateId: string`, `templateData: object`, `cc: any`, `bcc: any`, `replyTo: string`, `inReplyTo: string`, `headers: object`, `attachments: array`	API key · write	Send a message over a verified domain.
`mailkite_upload_attachment`	`filename: string`, `path: string`, `url: string`, `content: string`, `contentType: string`, `retentionDays: integer`	API key · write	Upload a file to MailKite storage and get back a secure, time-limited URL.
`mailkite_list_templates`	—	session · read	List your saved email templates (light metadata only — no body).
`mailkite_list_base_templates`	—	session · read	List the premade base templates (light metadata).
`mailkite_get_template`	`id*`	session · read	Get one template (full: subject, html, text, theme).
`mailkite_create_template`	`baseId: string`, `name: string`, `subject: string`, `html: string`, `text: string`, `json: string`, `theme: string`	session · write	Create a template.
`mailkite_list_domains`	—	session · read	List your domains, each with its webhook URL.
`mailkite_create_domain`	`domain*: string`	session · write	Add a domain.
`mailkite_get_domain`	`id*`	session · read	Get one domain with DNS records + webhook.
`mailkite_delete_domain`	`id*`	session · delete/replace	Remove a domain.
`mailkite_verify_domain`	`id*`	session · write	Check DNS and update status.
`mailkite_set_webhook`	`id`, `url: string`	session · delete/replace	Set or replace the domain's catch-all webhook.
`mailkite_delete_webhook`	`id*`	session · delete/replace	Remove the domain's webhook.
`mailkite_test_webhook`	`id*`	session · write	Send a signed test event to the domain's webhook.
`mailkite_check_domain_availability`	`domain*`	session · read	Check whether a domain is available to register, and at what price.
`mailkite_register_domain`	`domain: string`, `contact: object`, `years: integer`, `dryRun: boolean`	session · write	Register (buy) a domain on the customer's behalf; provisions mail DNS and adds it to the account in one call.
`mailkite_list_routes`	—	session · read	List inbound routing rules.
`mailkite_create_route`	`match*: string`, `action: string`, `destination: string`, `agentPrompt: string`, `agentForwardTo: array`	session · write	Create a route (match, action, destination).
`mailkite_delete_route`	`id*`	session · delete/replace	Delete an inbound routing rule by id.
`mailkite_agent`	`text*: string`, `subject: string`, `from: string`, `html: string`, `routeId: string`, `address: string`, `model: string`	API key · write	Send a message to one of your inbox agents and get its reply.
`mailkite_route`	`routeId: string`, `address: string`, `from*: string`, `subject: string`, `text: string`, `html: string`	API key · write	Route a message to one of your registered routes (by `routeId` or `address`), running that route's action — agent, webhook, or forward.
`mailkite_list_messages`	—	session · read	List stored messages, newest first.
`mailkite_get_message`	`id*`	session · read	Get a message with deliveries + attachments.
`mailkite_retry_delivery`	`id*`	session · write	Re-deliver a stored message to its webhook.
`mailkite_list_lists`	—	session · read	List your contact lists (static, curated broadcast audiences), each with its member count.
`mailkite_create_list`	`name*: string`	session · write	Create a contact list.
`mailkite_get_list`	`id*`	session · read	Get one contact list with its member count.
`mailkite_update_list`	`id`, `name: string`	session · write	Rename a contact list.
`mailkite_delete_list`	`id*`	session · delete/replace	Delete a contact list.
`mailkite_list_list_contacts`	`id*`	session · read	List the contacts that are members of a list, newest first.
`mailkite_add_list_contacts`	`id`, `contactIds: array`	session · write	Add contacts (by id, ctr_…) to a list.
`mailkite_remove_list_contact`	`id`, `contactId`	session · delete/replace	Remove one contact from a list (the contact itself is kept).
`mailkite_list_broadcasts`	—	session · read	List your broadcasts (one-to-many sends) with status and send stats.
`mailkite_create_broadcast`	`name: string`, `from*: string`, `replyTo: string`, `subject: string`, `preview: string`, `audience: object`, `templateId: string`, `html: string`, `text: string`, `footerAddress: string`	session · write	Create a broadcast draft.
`mailkite_get_broadcast`	`id*`	session · read	Get one broadcast with its status and recipient summary.
`mailkite_update_broadcast`	`id*`, `name: string`, `from: string`, `replyTo: string`, `subject: string`, `preview: string`, `audience: object`, `templateId: string`, `html: string`, `text: string`, `footerAddress: string`	session · write	Edit a draft broadcast (any of from/subject/audience/html/… ).
`mailkite_delete_broadcast`	`id*`	session · delete/replace	Delete a broadcast draft.
`mailkite_send_broadcast`	`id*`, `scheduledAt: string`	session · write	Send a broadcast now, or pass an ISO 8601 `scheduledAt` to schedule it.
`mailkite_verify_webhook`	`payload: string`, `signature: string`, `secret*: string`, `toleranceMs: integer`	local · read	Verify the `x-mailkite-signature` header on an inbound webhook delivery.
`mailkite_semantic_search`	`query*`	API key · read	Semantic search over the MailKite documentation — returns the most relevant doc sections for a natural-language query (hybrid vector + keyword search over https://mailkite.dev/docs).

Use it from an AI agent — MCP + Agent connectors

MailKite speaks the Model Context Protocol: every API method is a tool your AI assistant (Claude, Cursor, …) can call — send mail, manage domains, search the docs, and give an agent its own inbox. Full guide: https://mailkite.dev/docs/ai-agents.

Hosted (recommended) — one-click OAuth, no key to copy:

bash

claude mcp add --transport http mailkite https://mcp.mailkite.dev/mcp

In Claude Code you can also install the plugin:

text

/plugin marketplace add mailkite/claude-code
/plugin install mailkite@mailkite

Any chat/UI agent: "Add the MCP server at https://mcp.mailkite.dev/mcp and authenticate in the browser when prompted."

Local (static key, offline / CI):

json

{ "mcpServers": { "mailkite": { "command": "npx", "args": ["-y", "@mailkite/mcp"], "env": { "MAILKITE_API_KEY": "mk_live_…" } } } }

Give an agent its own inbox. Route inbound mail to a built-in inbox agent (the agent route action) and it answers, files, or escalates on its own — see https://mailkite.dev/docs/ai-agents.

All MailKite libraries

Same contract, every language — pick the one for your stack (full list: https://mailkite.dev/docs/libraries):

Library	Repo	Distribution
MailKite for Node.js	`mailkite-node`	npm
MailKite for Python	`mailkite-python`	PyPI
MailKite for Ruby	`mailkite-ruby`	RubyGems
MailKite for Java	`mailkite-java`	Maven Central
MailKite for PHP	`mailkite-php`	Packagist
MailKite for Go	`mailkite-go`	Go modules
@mailkite/cli	`mailkite-cli`	npm
@mailkite/mcp (this repo)	`mailkite-mcp`	npm
@mailkite/client	`mailkite-js`	npm
@mailkite/expo	`mailkite-expo`	npm
MailKiteClient	`mailkite-swift`	Swift Package Manager
dev.mailkite:mailkite-client	`mailkite-kotlin`	Maven Central
mailkite_client	`mailkite-flutter`	pub.dev

Docs & links

📚 Documentation: https://mailkite.dev/docs
📦 This library's guide: https://mailkite.dev/docs/libraries#mcp
🤖 AI agents (MCP + inbox agents): https://mailkite.dev/docs/ai-agents
🌐 Website: https://mailkite.dev
🧭 All libraries: https://mailkite.dev/docs/libraries

Install

claude_desktop_config.json

{
  "mcpServers": {
    "mail-send": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.mailkite.dev/mcp?ref=mail-send"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.