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Optimize
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Campaign Monitor MCP Server
for AI Agents
Production-ready Campaign Monitor MCP server with 73 extensible actions — plus built-in authentication, security, and optimized execution.
Campaign Monitor MCP Server
Built by 
StackOne
StackOne 
Coverage
73 Agent Actions
Create, read, update, and delete across Campaign Monitor — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Campaign Monitor MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Campaign Monitor tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.
Prompt Injection Defense →
Performance
Max Agent Context. Min Cost.
Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every Campaign Monitor call.
Tools Discovery →What is the Campaign Monitor MCP Server?
A Campaign Monitor MCP server lets AI agents read and write Campaign Monitor data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Campaign Monitor MCP server ships with 73 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, and optimized agent context. Connect it from MCP clients like Claude Desktop, Cursor, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All Campaign Monitor MCP Tools and Actions
Every action from Campaign Monitor's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Administrators
- Add Administrator
Add a new administrator to the Campaign Monitor account
- List Administrators
Retrieve all administrators for the Campaign Monitor account
- Get Administrator
Retrieve details for a specific administrator by email address
- Update Administrator
Update the name or email address of an existing administrator
- Delete Administrator
Remove an administrator from the Campaign Monitor account
Primary Contacts
- Get Primary Contact
Retrieve the primary contact administrator for the Campaign Monitor account
- Set Primary Contact
Set the primary contact for the Campaign Monitor account
Draft Campaigns
- Create Draft Campaign
Create a new draft email campaign for a client
- Send Draft Campaign
Send or schedule a draft campaign to its recipients
Custom Fields
- Create Custom Field
Create a new custom field for a subscriber list
- List Custom Fields
Retrieve all custom fields defined for a subscriber list
- Update Custom Field
Update the name and preference center visibility of a custom field
- Delete Custom Field
Delete a custom field from a subscriber list
Segments
- Create Segment
Create a new subscriber segment within a specific list
- Get Segment
Retrieve details of a specific segment by its ID
- Update Segment
Update the title and rules of an existing segment
- Delete Segment
Delete an existing segment
Subscribers
- Add Subscriber
Add or update a single subscriber in a subscriber list
- Import Subscribers
Bulk import multiple subscribers into a subscriber list
- Get Subscriber
Retrieve details for a specific subscriber in a list
- Update Subscriber
Update the details of an existing subscriber in a list
- Delete Subscriber
Permanently delete a subscriber from a subscriber list
Templates
- Create Template
Create a new email template for a client
- Copy Template
Copy an existing email template to the same or a different client
- Get Template
Retrieve details for a specific email template
- Update Template
Update the name or content source of an existing email template
- Delete Template
Permanently delete an email template
Smart Emails
- Send Smart Email
Send a transactional smart email to one or more recipients
- List Smart Emails
Retrieve all smart transactional email templates for a client
Transactional Messages
- List Transactional Messages
Retrieve a list of sent transactional messages with filtering options
- Get Transactional Message
Retrieve details for a specific transactional message
Webhooks
- Create Webhook
Register a webhook to receive notifications for subscriber list events
- List Webhooks
Retrieve all webhooks configured for a subscriber list
- Delete Webhook
Permanently delete a webhook from a subscriber list
Other (39)
- Send Campaign Preview
Send a preview of a draft campaign to specified email addresses
- Create List
Create a new subscriber list for a client
- Send Classic Transactional Email
Send a transactional email with fully custom content
- List Clients
Retrieve all clients associated with the authenticated account
- Get Billing Details
Retrieve billing details for the authenticated account (requires account-level API key)
- Get Client Details
Retrieve details for a specific client including their API key, contact information, and basic account details
- List Client Sent Campaigns
Retrieve all sent campaigns for a specific client
- List Client Subscriber Lists
Retrieve all subscriber lists for a specific client
- List Client Templates
Retrieve all email templates for a specific client
- List Client Segments
Retrieve all segments across all lists for a specific client
- List Client Draft Campaigns
Retrieve all draft (unsent) campaigns for a specific client
- List Client Scheduled Campaigns
Retrieve all scheduled campaigns for a specific client
- Get System Date
Retrieve the current date and time in the account's configured timezone
- List Valid Timezones
Retrieve all valid timezone names accepted by the Campaign Monitor API
- List Valid Countries
Retrieve all valid country names accepted by the Campaign Monitor API
- Get Campaign Summary
Retrieve a performance summary for a sent campaign
- Get Campaign Bounces
Retrieve all email bounces for a sent campaign
- Get Campaign Opens
Retrieve all email opens for a sent campaign
- Get Campaign Clicks
Retrieve all link clicks for a sent campaign
- Get Campaign Recipients
Retrieve all recipients of a sent campaign
- Get Campaign Unsubscribes
Retrieve all unsubscribes resulting from a sent campaign
- Get Campaign Spam Complaints
Retrieve all spam complaints for a sent campaign
- Get List Details
Retrieve details and statistics for a subscriber list
- Get List Stats
Retrieve comprehensive summary statistics for a subscriber list
- List Active Subscribers
Retrieve all active subscribers for a subscriber list
- List Unsubscribed Subscribers
Retrieve all unsubscribed subscribers for a subscriber list
- List Bounced Subscribers
Retrieve all bounced subscribers for a subscriber list
- List Deleted Subscribers
Retrieve all deleted subscribers for a subscriber list
- List Segments By List ID
Retrieve all segments defined for a subscriber list
- Get Subscriber History
Retrieve campaign history for a specific subscriber
- Get Smart Email Details
Retrieve details for a specific smart transactional email
- Update List
Update the settings for an existing subscriber list
- Update Custom Field Options
Update the available options for a multi-select custom field
- Delete Campaign
Delete a draft campaign from the account
- Delete List
Delete a subscriber list and all its subscribers
- Unsubscribe Subscriber
Unsubscribe an email address from a subscriber list
- Test Webhook
Send a test payload to a webhook endpoint to verify it is reachable and responding correctly
- Activate Webhook
Activate a previously deactivated webhook so it resumes receiving event notifications
- Deactivate Webhook
Deactivate a webhook to temporarily pause event notifications without deleting it
Set Up Your Campaign Monitor MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Campaign Monitor in under 10 lines of code.
MCP Clients
Agent Frameworks
JSON{
"mcpServers": {
"stackone": {
"command": "npx",
"args": [
"-y",
"mcp-remote@latest",
"https://api.stackone.com/mcp?x-account-id=<account_id>",
"--header",
"Authorization: Basic <YOUR_BASE64_TOKEN>"
]
}
}
}Campaign Monitor MCP Server Resources
MCP Code Mode: Keeping Tool Responses Out of Agent Context
Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.
11 min
Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery
Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.
10 min
Indirect Prompt Injection Defense for MCP Tools: A Technical Guide
MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.
12 min
Campaign Monitor MCP Server FAQ
Campaign Monitor MCP server vs direct API integration — what's the difference?
A Campaign Monitor MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling Campaign Monitor. A Campaign Monitor MCP server is for AI agents — MCP clients like Claude and Cursor, plus framework agents built with OpenAI, LangChain, or Vercel AI — discovering and calling Campaign Monitor at runtime. StackOne provides both.
How does Campaign Monitor authentication work for AI agents?
Campaign Monitor authentication for AI agents works through a StackOne Connect Session. Create one via the dashboard or the SDK — you get an auth link and ready-to-paste config for Claude Desktop, Cursor, and other MCP clients. Your user authenticates their own Campaign Monitor account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via
origin_owner_id.Are Campaign Monitor MCP tools vulnerable to prompt injection?
Yes — Campaign Monitor MCP tools can be vulnerable to indirect prompt injection. Any tool that reads user-written content — documents, messages, tickets, records, or free-text fields — is a potential vector. StackOne Defender scans every tool response before it enters the agent's context — regex patterns in ~1ms, then a MiniLM classifier in ~4ms. 88.7% accuracy, CPU-only.
What is the context bloat of a Campaign Monitor agent and how do I avoid it?
Context bloat happens when Campaign Monitor tool schemas and API responses eat your Campaign Monitor agent's memory, preventing it from reasoning effectively. A single Campaign Monitor query can return a massive JSON response, and connecting multiple tools compounds the problem. Tools Discovery and Code Mode reduce context bloat — loading only relevant tools per query and keeping raw responses out of the agent's context.
Can I limit which actions my Campaign Monitor agent can access?
Yes — you can limit which actions your Campaign Monitor agent can access directly from the StackOne dashboard. Toggle actions on or off, or restrict them to specific accounts, with no code changes to your agent. Session tokens can be scoped to exact actions so if one leaks, exposure stays contained.
Can I create custom agent actions for my Campaign Monitor MCP server?
Yes — you can create custom agent actions for your Campaign Monitor MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research Campaign Monitor's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a Campaign Monitor MCP server?
Skip a Campaign Monitor MCP server if your integration is purely software-to-software — direct Campaign Monitor API integration is simpler when no AI agent is involved. For deterministic, compliance-critical operations (financial transactions, regulatory reporting), direct API gives you predictable behavior without agent-driven decision-making. MCP shines when AI agents need to dynamically discover and call Campaign Monitor actions at runtime.
What AI frameworks and AI clients does the StackOne Campaign Monitor MCP server support?
The StackOne Campaign Monitor MCP server supports both. MCP clients (paste-and-go apps): Claude Desktop, Claude Code, Cursor, VS Code, Goose. Agent frameworks (code SDKs you build with): OpenAI Agents SDK, Anthropic, Vercel AI, Google ADK, CrewAI, Pydantic AI, LangChain, LangGraph, Azure AI Foundry.
Put your AI agents to work
All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.