Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Active campaign MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.
Table of Contents
Connect Active campaign without Auth hassles
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Also integrate Active campaign with
Why use Composio?
Apart from a managed and hosted MCP server, you will get:
- CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Large tool responses: Handle them to minimise context rot.
- Dynamic just-in-time access to 20,000 tools across 870+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.
How to install Active campaign MCP in Codex
Run the setup command
Run this command in your terminal to add the Composio MCP server to Codex.
It will initiate the authentication in a browser window, authorize Codex to access your Composio account.
(Optional) Authenticate with OAuth
To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.
Verify the connection
Run codex mcp list to confirm Composio appears as a registered MCP server.
Codex App
Codex App follows the same approach as VS Code.
- Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
- Fill the header and Key fields with
{ "x-consumer-api-key" = "ck_*******" }. - The Key is the Composio API key, that you can find on connect.composio.dev
- Click on Authenticate and authorize Codex to your Composio account and you're all set.
- Restart and verify if it's there in
.codex/config.toml
What is the Active campaign MCP server, and what's possible with it?
The ActiveCampaign MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your ActiveCampaign account. It provides structured and secure access to your marketing automation and CRM data, so your agent can perform actions like adding contacts, managing deals, creating tasks, and organizing pipelines on your behalf.
- Automated contact management: Easily add new contacts, update details, or attach notes so your customer database stays current and actionable.
- Sales pipeline creation and management: Let your agent create, customize, or delete deal pipelines and organize deals through every stage of your sales process.
- Task and activity automation: Have your agent create tasks for contacts and deals, assign due dates, and ensure important follow-ups never slip through the cracks.
- Deal and account organization: Automatically create, update, or remove accounts and associate them with the right contacts and opportunities for seamless CRM workflows.
- Seamless automation enrollment: Add contacts directly to specific automations, personalizing your marketing or sales outreach at scale without manual effort.
Supported Tools & Triggers
Conclusion
You've successfully integrated Active campaign with Codex using Composio's MCP server. Now you can interact with Active campaign directly from your terminal, VS Code, or the Codex App using natural language commands.
Key benefits of this setup:
- Seamless integration across CLI, VS Code, and standalone app
- Natural language commands for Active campaign operations
- Managed authentication through Composio
- Access to 20,000+ tools across 870+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various Active campaign operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities










