ActiveCampaign MCP Server
for AI Agents
Connect your AI agent to StackOne's ActiveCampaign MCP server and give it 32 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
32 Agent Actions
Create, read, update, and delete across ActiveCampaign — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your ActiveCampaign MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every ActiveCampaign 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 ActiveCampaign call.
Tools Discovery →What is the ActiveCampaign MCP Server?
A ActiveCampaign MCP server lets AI agents read and write ActiveCampaign data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's ActiveCampaign MCP server ships with 32 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, observability, and agent execution runtime. Connect it from MCP clients like Claude Desktop, Claude Code, Cursor, Goose, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All ActiveCampaign MCP Tools
Every action from ActiveCampaign's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Contacts
- Create Contact
Create a new contact in ActiveCampaign
- List Contacts
List, search, and filter contacts in ActiveCampaign
- Get Contact
Retrieve a specific contact by ID
- Update Contact
Update an existing contact in ActiveCampaign
- Delete Contact
Delete a contact from ActiveCampaign
Contact Activities
- List Contact Activities
List a contact's recent activities including emails sent, opens, clicks, and other interactions
Tag To Contacts
- Add Tag To Contact
Add a tag to a contact for segmentation and automation
Tag From Contacts
- Remove Tag From Contact
Remove a tag from a contact
Campaigns
- Create Campaign
Create a new campaign in ActiveCampaign
- List Campaigns
List all email campaigns in ActiveCampaign
- Get Campaign
Retrieve a specific campaign by ID
Messages
- Create Message
Create a new email message template in ActiveCampaign
- List Messages
List all email messages (templates) in ActiveCampaign
- Get Message
Retrieve a specific message (template) by ID
- Update Message
Update an existing message template
- Delete Message
Delete a message (template) from ActiveCampaign
Lists
- List Lists
Retrieve all lists (contact groups) in ActiveCampaign
Create Lists
- Create List
Create a new contact list in ActiveCampaign
Get Lists
- Get List
Retrieve a specific list by ID
Delete Lists
- Delete List
Delete a contact list from ActiveCampaign
Tags
- Create Tag
Create a new tag in ActiveCampaign
- List Tags
List all tags in ActiveCampaign
- Get Tag
Retrieve a specific tag by ID
- Delete Tag
Delete a tag from ActiveCampaign
Accounts
- Create Account
Create a new account (company/organization) in ActiveCampaign
- List Accounts
List all accounts (companies/organizations) in ActiveCampaign
- Get Account
Retrieve a specific account by ID
- Update Account
Update an existing account (company/organization) in ActiveCampaign
Deals
- Create Deal
Create a new deal in ActiveCampaign CRM
- List Deals
List all deals in ActiveCampaign CRM
- Get Deal
Retrieve a specific deal by ID
- Update Deal
Update an existing deal in ActiveCampaign CRM
ActiveCampaign AI Agent Use Cases
Connect your AI agent to ActiveCampaign and help your team scale the sales operations they run by hand today.
Use StackOne to connect your AI agent to your CRM, email, and calendar tools to automate post-demo follow-up.
ViewUse StackOne to connect your AI agent to your CRM, email, and calendar tools to automate deal risk scoring and pipeline alerts.
ViewUse StackOne to connect your AI agent to your marketing automation, CRM, and email tools to automate lead nurture email sequences.
ViewSet Up Your ActiveCampaign MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to ActiveCampaign in under 10 lines of code.
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>"
]
}
}
}Check More CRM MCP Servers
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Platform 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
MCP vs A2A: Architecture, Security, and When to Use Each
MCP vs A2A: what each protocol standardizes, how they differ, their shared security risks including indirect prompt injection, and when to use one, both, or a hybrid architecture.
12 min
MCP vs API: What 200+ Connector Builds Taught Us
MCP wraps APIs, it doesn't replace them. After building 200+ connectors that serve both, here's when each approach wins.
14 min read
ActiveCampaign MCP Server FAQ
Does StackOne have a ActiveCampaign MCP server?
ActiveCampaign MCP server vs direct API integration — what's the difference?
How does ActiveCampaign authentication work for AI agents?
origin_owner_id.Are ActiveCampaign MCP tools vulnerable to prompt injection?
What is the context bloat of a ActiveCampaign agent and how do I avoid it?
Can I limit which actions my ActiveCampaign agent can access?
Can I create custom agent actions for my ActiveCampaign MCP server?
When should I NOT use a ActiveCampaign MCP server?
What AI frameworks and AI clients does the StackOne ActiveCampaign MCP server support?
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.