MCP server
Mailchimp Transactional MCP server
Mailchimp's official MCP server covers Mailchimp Transactional (Mandrill): account status, templates, API help and send diagnostics.
- Official server
- Communication
At a glance
- Maintained by
- Mailchimp (Intuit)
- Tools exposed
- 9 listed below
- Reviewed
- September 24, 2026
Why it matters
What it does and why it matters
Mailchimp is best known for marketing email, but its official MCP server covers Mailchimp Transactional, the service formerly called Mandrill, used for order confirmations, password resets and other automated emails. An assistant can check account status, help build templates, describe and call the API, diagnose failed sends and guide integration.
Diagnosing failed sends is the standout feature. When an important email does not arrive, the assistant can look into why.
At review time, we found no official MCP server for Mailchimp Marketing, the campaigns and audiences product. If you need AI help with marketing campaigns, an automation platform such as Zapier may be the practical route. The generic API call tool can take real actions, so use a restricted key and review calls.
Use cases
Best business use cases
Failed sends
Templates
Integration help
Account checks
API lookup
Tools
Available tools
Tool names as published by the maintainer at review time. Versions change, so check the repository for the current list.
Read and write: Read and write through call_api (sending and account actions); mostly developer and diagnostic tools.
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account_statusCheck account status.
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build_templateBuild an email template.
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call_apiCall a Transactional API endpoint.
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describe_apiDescribe an API endpoint in detail.
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list_apiList available API endpoints.
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diagnose_failed_sendFind out why a send failed.
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integrate_apiHelp with API integration.
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onboardingGuide account setup.
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submit_feedbackSend feedback to Mailchimp.
Workflows
Example workflows
Diagnose a missing email
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1
A customer says a receipt never arrived.
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2
The assistant runs the failed send diagnosis.
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3
It finds the bounce reason.
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4
It suggests a fix.
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5
Support explains the next step to the customer.
Update a receipt template
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1
Describe the change needed.
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2
The assistant builds the updated template.
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3
You preview it.
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4
You approve the change.
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5
It is saved for use.
Prompts
Example prompts
“Why did the receipt email to this address fail yesterday?”
“Build a transactional template for order shipped notifications.”
“What is our account status and sending reputation?”
Setup
Installation and configuration
Examples for Claude Desktop and Claude Code. Replace the placeholder values with your own keys, and store secrets outside version control.
Claude Desktop: claude_desktop_config.json
{
"mcpServers": {
"mctx-mcp": {
"type": "http",
"url": "https://mandrillapp.com/mcp",
"headers": {
"Authorization": "Bearer YOUR_API_KEY"
}
}
}
}Claude Code: terminal
claude mcp add --transport http mctx-mcp https://mandrillapp.com/mcp -H "Authorization: Bearer YOUR_API_KEY"- Hosted server: https://mandrillapp.com/mcp.
- Needs: Mailchimp Transactional API key as Bearer token. Restricted keys need the AI Agents permission group..
Security
Security considerations
-
Approve outgoing messages
Require a person to approve messages to customers until a workflow is proven.
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Limit channels
Give access only to the channels, mailboxes or numbers a task needs.
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Untrusted messages
Incoming messages can contain text meant to mislead an AI. Treat them as data.
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Keep a log
Use restricted keys and log API calls made through the assistant.
Related servers
Servers that pair well with it
Resend
Resend's official MCP server lets AI send emails and batches, read sent and received mail, manage contacts, send broadcasts and verify domains.
HubSpot
HubSpot's official hosted MCP server lets AI search and manage CRM records, query CRM data and work with marketing emails, pages and posts.
Zapier
Zapier's official MCP server lets AI discover, enable and run actions across thousands of connected apps, with separate read and write tools.
Keep exploring
Solutions and services that use it
Related services
View all related services- MCP integration Connect AI assistants to your CRM, files, databases and tools through Model Context Protocol servers, with safe permissions.
- AI workflows Step-by-step automations where AI handles the reading, sorting and drafting inside a process you control.
- AI agents AI that takes actions in your systems, such as qualifying leads or processing requests, with people checking the results.
- Third-party integrations Google Workspace, Microsoft 365, accounting, shipping and marketing tools connected to your own software.
- Automation and Integrations CRM, payment and API integrations, MCP connections and workflows that stop people copying data by hand.
- Ecommerce websites Online stores with clean product catalogs, simple checkout and the integrations that keep orders moving.
Solutions
View all solutions- Email triage Sort a shared inbox by topic and urgency, pull out the key details and draft replies for a person to send.
- AI support agent An assistant that answers routine questions from your own content, checks orders and hands anything else to a person.
- AI automation and integrations Connect the tools you already use so data moves once, correctly, and AI reads the parts that arrive as text or documents.
- AI lead qualification Score, research and route every new inquiry so your team talks to the best leads first.
- AI sales research agent Short, sourced briefings on each prospect before a call, drafted by an AI agent from public information and your CRM.
- Scheduling and drafting automation Turn one piece of content into posts for each channel, schedule them and track results, with approval before anything goes out.
Industries
View all industries- Marketing agencies Landing pages, content workflows, client reporting and white-label development capacity for marketing agencies.
- Vacation rentals Booking websites, owner and guest portals, turnover scheduling and guest messaging for rental operators.
- Logistics and transportation Driver apps, order and shipment tracking, document processing and integrations for logistics and delivery companies.
- Real estate Listing sites, lead handling, CRM automation and document workflows for agencies, brokers and developers.
Case studies
View all case studiesGuides and articles
View all guides and articles- What can AI do for a small business? Practical AI uses for small businesses, from inboxes and documents to customer support, with costs and first steps.
- AI automation vs traditional automation How rule-based automation and AI automation differ, where each fits and how to combine them.
- How to build an AI workflow with MCP servers Plan, connect and test an AI workflow that uses MCP servers, from a single task to a reliable process.
- AI chatbot vs AI agent What separates a chatbot that answers from an agent that acts, and when you need each.
AI models
View all ai models- Claude Haiku 4.5 Anthropic's fastest and lowest-cost Claude model, with near-frontier intelligence for high-volume and real-time work.
- General purpose All-round language models for writing, summarizing, support, extraction and most everyday business tasks.
- Speech Speech-to-text and text-to-speech models for transcription, call analysis and voice assistants.
- Gemini 3.5 Flash-Lite Google's lowest-cost current Gemini model for high-throughput work such as sub-agent tasks and document parsing.
- Deepgram Nova-3 and Flux Deepgram's speech-to-text models: Nova-3 for general transcription in 60+ languages, and Flux for voice agents with built-in end-of-turn detection.
- GPT-6 Luna OpenAI's most efficient model for focused, high-volume tasks, with vision, tool calling and structured outputs at the lowest price level in the family.
Glossary terms
View all glossary terms- API integration An API integration connects two or more systems through their APIs so data and actions flow between them automatically.
- Webhook A webhook is an automatic message one system sends to another's web address when something happens, such as a payment or a new order.
- API An API, or application programming interface, is a defined way for one piece of software to request data or actions from another.
- Artificial intelligence Artificial intelligence is the broad field of building software that performs tasks that normally need human judgment, such as understanding language or images.
- Fine-tuning Fine-tuning is further training an existing AI model on your own examples so it learns a specific style, format or task.
- Model Context Protocol The Model Context Protocol, or MCP, is an open standard for connecting AI assistants to external tools and data in a consistent way.
FAQ
Questions people ask us
Have a question that is not here? Ask us directly.
No. At review time it covered Mailchimp Transactional only.
Yes. It is maintained by Mailchimp, part of Intuit.
Mailchimp's service for automated emails such as receipts, formerly called Mandrill.