Email MCP server

Send and manage emails right from your AI tools like ChatGPT, Claude, Codex, Google Gemini CLI, VS Code, Cursor, or Windsurf. It runs on Sidemail’s proven email API for reliable delivery, tracking, and scalability – so every message reaches its destination.

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Sidemail Email MCP server – Writing a product update email via AI tool

Key features & perks

Why Sidemail Email MCP Server

Send & manage emails from AI tools

Sidemail’s MCP server lets your LLM set up transactional email sending, write newsletters, manage templates, inspect inbound email, or update project settings via simple commands.

It can also validate email addresses before you store or contact them, with optional deep SMTP checks when you need more confidence.

Every email goes through Sidemail’s trusted infrastructure, so you don’t need to handle the email complexity yourself.

Sidemail dashboard – Email sending history
Sidemail dashboard – Contact management
Graphics

Organize your contacts & groups

Add or update contacts from inside an AI chat.

You can also organize your contacts into groups – Sidemail’s MCP tools like create‑group and create‑or‑update‑contact make it effortless to manage your audience.

Domain verification & deliverability

Via Sidemail MCP server, you can also add, delete and list your sending domains, complete with automatic DKIM and SPF setup.

You get built‑in deliverability best practices to ensure your emails hit inboxes reliably.

Sidemail Email MCP server – Adding a new sending domain via AI tool
Sidemail Email MCP server – Claude, ChatGPT, VS Code, Google Gemini, Windsurf, and Cursor

Works where you work

Sidemail Email MCP server works with popular MCP‑compatible clients.

Use it in chat‑based AI interfaces like ChatGPT and Claude Desktop or inside development environments like VS Code, Cursor, Windsurf, Claude Code, Codex, Google Gemini CLI, and GitHub Copilot CLI – anywhere that supports the Model Context Protocol.

How It Works (step‑by‑step)

1

Connect Sidemail in your AI client

Add Sidemail’s hosted remote MCP server to your compatible AI client using https://api.sidemail.io/mcp.

You can also open “Connect an AI agent” in your Sidemail Dashboard and copy the setup instruction for your client.

2

Sign in and choose a project

In supported OAuth clients, Sidemail opens in your browser. Sign in, choose the project your assistant can access, and approve the connection. Your Sidemail API key is never shared with the client.

3

Done! Your AI agent can now help you manage and send your emails

You can now ask your AI agent to perform tasks that help you manage and send your emails and contacts.

For example, ask it to write a draft of a product‑update email based on the recent features you added to your service. Refine the draft in the chat, then, when you’re happy with it, send it to your customers or schedule the delivery later.

The potential is limitless — to see everything you can do check the documentation.

Developer‑First Features You Will Enjoy

  • Natural prompt workflow

    Use plain language to manage emails, contacts, domains, and templates. The AI handles the steps, retrieves data, calls the corresponding email API, and asks for confirmation before final actions. Keeping you in control.

  • Built‑in deliverability best practices

    With Sidemail, you don’t need to babysit DNS or stress about IP warm up, feedback loops, HTML email structure and other tricky stuff. We provide you with the best practices out‑of‑the‑box.

  • Your sending domain & DKIM

    Use your own domain for sending. To establish the best delivery results, we automatically set up for you DKIM and SPF.

  • Clean, readable docs

    Sidemail provides developer‑friendly documentation with clear examples, so you don’t have to guess how things work.

  • 5‑star rated support

    Get prompt, personal help whenever you need. We’re here for you to help (even on weekends!). If you ever need anything, you'll get help from the engineers who built the platform.

  • Project access you control

    Choose the project your assistant can access during OAuth sign‑in. Your API key stays with Sidemail, and you can disconnect the agent from your Dashboard at any time.

Get started today

Ready for hassle‑free email delivery? With Sidemail, you’ll be sending reliably in minutes.

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FAQs

What is an Email MCP server?

An Email MCP server is essentially an email integration for AI. MCP stands for Model Context Protocol – an open standard that lets AI assistants use tools and external services. Sidemail’s Email MCP server is a program that translates Sidemail’s email features (sending emails, managing contacts and domains, etc.) into a format an AI like Claude or Cursor can use. In practice, it means you can prompt an AI to perform email tasks (send a message, add a contact, etc.), and the MCP server will carry out those actions via Sidemail’s API, then return the results to the AI.

How do I connect Sidemail’s Email MCP server in Claude Code?

Add Sidemail to your user‑level MCP configuration:
claude mcp add --transport http sidemail --scope user https://api.sidemail.io/mcp
Open /mcp in Claude Code and complete the browser sign‑in. Choose a project and approve the connection. You can also connect directly from your Sidemail Dashboard. Read more in docs.

How do I connect Sidemail’s Email MCP server in Codex?

Add Sidemail to your user‑level MCP configuration:
codex mcp add sidemail --url https://api.sidemail.io/mcp
codex mcp login sidemail
Complete the browser sign‑in, choose a project, and approve the connection. Then run codex mcp list to verify the connection. You can also connect directly from your Sidemail Dashboard. Read more in docs.

How do I set up the Sidemail Email MCP server in VS Code?

Add Sidemail to your user‑level MCP configuration:
code --add-mcp '{"name":"sidemail","type":"http","url":"https://api.sidemail.io/mcp"}'
Complete the browser sign‑in when VS Code connects, choose a project, and approve access. You can also connect directly from your Sidemail Dashboard. Read more in docs.

What other AI tools work with Sidemail’s Email MCP server?

You can connect Sidemail to any MCP‑compatible client, including ChatGPT, Claude Desktop, Claude on the web, Google Gemini CLI, GitHub Copilot CLI, Windsurf, and Cursor. See our setup guide for instructions for your client.

Do I need an API key or a local MCP server?

Supported OAuth clients connect through browser sign‑in, so you do not need to copy an API key or run a local server. Clients that cannot use Sidemail OAuth can connect to the hosted server with an API key. The local @sidemail/mcp package is still available for clients that require stdio. See the setup guide for the right option for your client.

Which project can my AI assistant access?

An OAuth connection gives your assistant access to the project you select when signing in. To remove access, open Connect an AI agent in your Sidemail Dashboard and disconnect the agent under Connected agents.

Can I manage contacts and domains through the MCP server?

Yes – managing your subscriber lists and sender domains is a core part of Sidemail’s MCP server. There are also tools for groups, templates, inbound routes, received emails, project settings, validation, and API logs.

Are there any usage limits or extra costs for using the Email MCP server?

There’s no additional fee to use the Email MCP server. It’s included for all Sidemail users.