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Campaign Monitor API and MCP server

Campaign Monitor cannot turn a journey on or off from outside the app, and its API key is a setup step for a developer. Sign in to Campaign Monitor once in your own Cloud Browser, and your AI agent does the work there for you. The same tools work over MCP for agents and as a REST API for scripts.

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Not affiliated with Campaign Monitor.

Campaign Monitor has no API for this. So we run one for you.

Campaign Monitor's own API, a GitHub MCP server and Cotlet compared
What you need Campaign Monitor's APIGitHub MCP serverCotlet
Journey switch, agent-ready tools No Partly Yes, 13 tools
Acts as you, signed in 24/7 No No Yes, Cloud Browser
Fixed for you when Campaign Monitor changes N/A No Yes, tested every 6h
Runs with your laptop off N/A No Yes, hosted

Checked Oct 22, 2026. Sources: Campaign Monitor API v3.3 · Campaign Monitor API: Getting started (authentication) · Campaign Monitor API: Journeys · Zapier Help: Get started with Campaign Monitor on Zapier

Your own Cloud Browser, on 24/7. Sign in once. We keep it connected.

  1. 01Sign in to Campaign Monitor in your own Cloud Browser

  2. 02Connect it for your agents

  3. 03Cotlet keeps it signed in and working

How do I connect Campaign Monitor to Claude, ChatGPT or my code?

AI agents connect over MCP, scripts call the REST API. Both reach the same 13 tools with one API key.

For AI agents: MCP

Add Cotlet to your agent once. Campaign Monitor and every other app you connect show up as its tools.

  • Claude
  • ChatGPT
  • OpenClaw
  • Hermes
  • GrokBot
  • Cursor
  • n8n
  • Any MCP client
  1. 1

    Add Cotlet to your agent

    Claude Code
    claude mcp add --transport http cotlet \
  https://cotlet.dev/mcp/v1 \
  --header "Authorization: Bearer $COTLET_API_KEY"
    Cursor
    {
  "mcpServers": {
    "cotlet": {
      "url": "https://cotlet.dev/mcp/v1",
      "headers": {
        "Authorization": "Bearer ${COTLET_API_KEY}"
      }
    }
  }
}
    Codex
    # ~/.codex/config.toml
[mcp_servers.cotlet]
url = "https://cotlet.dev/mcp/v1"
bearer_token_env_var = "COTLET_API_KEY"

    Paste the snippet for your client. The same server and key serve every app you connect, so you do this once.

For scripts: REST API

Every tool is an endpoint under /api/v1/campaign-monitor with its own method and path, such as POST /api/v1/campaign-monitor/campaign-drafts, with the same API key. Our open-source repo has ready scripts to start from.

REST API docs

What can the Campaign Monitor API and MCP server do?

13 tools on your own Campaign Monitor account. Agents call them as operations of the MCP tools campaign_monitor_read and campaign_monitor_write; scripts call each one at its own REST endpoint, with the same inputs and answers.

API reference
Campaign Monitor tools in Cotlet's MCP server and REST API
Tool What it does Access
list_lists Returns the subscriber lists of the account. read
list_segments Lists the segments of one list, or of all lists. read
list_subscribers Lists the subscribers of a list by state. read
list_campaigns Lists sent, scheduled or draft campaigns. read
get_campaign_report Reads the Snapshot of a sent campaign. read
list_campaign_activity Lists recipients of a sent campaign by what they did. read
list_journeys Lists the journeys of the account. read
get_journey Reads the summary and email steps of a journey. read
create_segment_from_campaign Creates a segment of people who opened, clicked or did not open a campaign. write
create_campaign_draft Creates a single campaign in Drafts with subject, sender, recipients and HTML. write
add_subscriber Adds one person to a list. writeasks first
schedule_campaign Sends a draft now or schedules it for later. writeasks first
set_journey_status Moves the on and off switch of a journey. writeasks first

Scroll the table for all 13 tools.

Ask in plain words. Your agent does the rest.

All Campaign Monitor use cases

Is it safe to connect Campaign Monitor?

You sign in yourself in your own Cloud Browser, we never save your password, and anything that reaches your readers waits for your OK. The browser profile is encrypted in the EU. Independent scanners grade cotlet.dev A+.

Security overview

How much do the Campaign Monitor API and MCP server cost?

One price for both: a tool call costs the same over MCP or REST. Free 7-day trial with 2,000 credits, no card needed. Then one-time credit packs, no subscription, valid 12 months. Most calls use 25 credits, and your Cloud Browser uses 50 credits a day while Campaign Monitor is enabled for agents, so 20 calls a day come to 550 credits.

See full pricing
Cotlet credit packs: price, credits and calls at 25 credits each
Credits Price, one time Calls at 25 credits Per 1,000 credits
5,000 $29 200 $5.80
15,000 $79 600 $5.27
32,000 $149 1,280 $4.66
60,000 $249 2,400 $4.15

Only successful calls use credits; failed calls and timeouts cost nothing. At a balance of 0 calls pause, never a surprise charge. Authenticate with the Authorization: Bearer header.

Questions

Does Campaign Monitor have an API?

Campaign Monitor has a full public REST API, v3.3, for lists, subscribers, segments, campaigns, reports and transactional email, and no official MCP server (checked 22 Oct 2026). Any account holder can get an API key in account settings or register an OAuth app. The API cannot create, edit, turn on or turn off a journey.

How do I get access?

Sign up free, open Campaign Monitor under Integrations in the console and press Request access. Your free trial starts with your account, no card needed.

Is the MCP server different from the API?

No, only the way in. Cotlet builds each integration as a REST API and puts an MCP server on top, so both have the same 13 tools, the same inputs and answers, one API key and one price. AI agents such as Claude, ChatGPT or Cursor use MCP; scripts, cron jobs and HTTP steps in n8n, Make or Zapier use the REST API.

What is the Cloud Browser?

Your own Chrome that Cotlet runs for you in the EU, around the clock. You open it from the console, sign in to Campaign Monitor yourself and press Enable for agents. Your agent's calls go through it, from its IP with its cookies, so Campaign Monitor sees the browser you signed in with. Password saving is off and the profile is stored encrypted with AES-256-GCM.

Can my agent act without asking me?

Not on anything that reaches other people: add_subscriber, schedule_campaign, set_journey_status wait for your OK by default. You can switch that off per tool for scheduled runs.

Which Campaign Monitor permissions does my agent need?

It works with the permissions of the account you sign in with. Campaign reports need the reports permission, drafts need create campaigns and journeys need automation. Turning a journey on also needs a monthly billing plan, and a send to more than 5 recipients may ask for payment, which the call reports instead of paying.

Can the agent design the email?

create_campaign_draft sets the subject, sender and recipients, and takes your HTML through Import HTML. The visual editor stays in Campaign Monitor, so a draft without html keeps an open Design step you finish there.

How long before I can send to a new segment?

Campaign Monitor's API docs say to wait about an hour after importing subscribers or changing a segment before sending to it. The agent schedules re-sends with that gap, which is why schedule_campaign takes a send_at.

Should I use a Campaign Monitor MCP server from GitHub instead?

Pick one if you want the code on your own computer and do not mind the upkeep: you install it, sign it in and fix it when Campaign Monitor changes. Pick Cotlet if you want it hosted and kept working for you.

Can I use it in n8n, Make or Zapier?

Yes. Add https://cotlet.dev/mcp/v1 in n8n's MCP Client node, or call the REST endpoints from an HTTP step in Make or Zapier.

Who runs Cotlet?

Cotlet is run by Take Group, a Polish software company working since 2019. Take Group runs about 3,200 websites on its own systems and has its own DevOps team for infrastructure security. We built and used integrations like this inside the company for years before opening them as Cotlet.

Is Cotlet affiliated with Campaign Monitor?

No. Cotlet is independent and not affiliated with Campaign Monitor.

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