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Systeme.io

Systeme.io MCP Server

Yes. Systeme.io has an official MCP server, hosted at mcp.systeme.io/mcp.

OFFICIAL MCP✓ alivePublic APIAuth: api_keyLLMs: Claude (Desktop/Web), ChatGPT, Claude Code
Open MCP pageTry Systeme.io
MCP status verified 2026-07-08Agent-readiness 7/10
Data from Buddy's database, auto-rechecked weekly

What is the Systeme.io MCP server?

Systeme.io runs an official MCP server at mcp.systeme.io/mcp, and the notable part is that it works on the free plan. You generate an MCP key in Settings under MCP & API keys (up to two keys, each valid 90 days), then connect with the URL https://mcp.systeme.io/mcp?mcpKey=YOUR_KEY. Authentication is by that key, passed either in the URL or the X-MCP-Key header. OAuth is on their roadmap, which would remove the key-expiry step.

The tools cover the core of an online business: contacts (list, create, update, delete), tags (full CRUD plus assign and remove from contacts), custom contact fields, and newsletters (create, update, review). Funnel support is present but narrow, it creates and retrieves opt-in funnel steps only. So an agent can manage your audience and drafts end to end, but it cannot yet delete newsletters or build full sales funnels through MCP.

For a free-tier tool this is a genuinely useful agent surface. ChatGPT and Claude Desktop are both documented, the server is properly rate-limited (standard X-RateLimit headers, 429 on overage), and write access is real. The honest ceiling is the API-key model with 90-day expiry and the opt-in-only funnel scope, which is why it lands at a 7 rather than higher.

For the rest of the picture see the Systeme.io review, full pricing breakdown, .

Inside Claude / Cursor / Codex

What you can build with the Systeme.io MCP

Illustrative workflow examples. Exact tool names, parameters, and outputs come from Systeme.io's MCP server schema — check the docs for the live surface.

systeme-io-mcplive
>Pull my latest Systeme.io data into Claude
●systeme-io.get_latest()
LATEST ACTIVITY · 5
Most recent entry2 minutes ago
Records this week147
Active integrations4 connected
Storage used12.4% of plan
API calls today1,832
Drill into any of these?
systeme-io-mcplive
>Compare this month vs last month
●systeme-io.compare_periods({ period: "MoM" })
KEY METRICS · MoM
Total volume+18.4%
Active users+9.2%
Engagement rate−2.1%
Conversion rate+4.6%
Breakdown of the engagement dip?
systeme-io-mcplive
>What changed in the last 7 days that I should know about?
●systeme-io.recent_changes({ period: "7d" })
NOTABLE CHANGES · 3
New integration enabled2d ago
Plan limit reached92%
Top performer shifttoday
TMB SCORE FOR Systeme.ioMCP: OfficialAgent fit: 7/10
Read review →

Which AI clients can use Systeme.io MCP?

Not every AI assistant supports MCP natively. Per-client picture for Systeme.io:

ClientSupportNotes
Claude (Desktop/Web)Native MCPAdd https://mcp.systeme.io/mcp?mcpKey=YOUR_KEY as a custom connector; the MCP key is generated free in Systeme.io settings.
ChatGPTNative MCPDocumented by Systeme.io; connect with the same MCP key via ChatGPT's connector settings.
Claude CodeNative MCPclaude mcp add --transport http systeme https://mcp.systeme.io/mcp?mcpKey=YOUR_KEY (key passed in the URL or the X-MCP-Key header).

How to connect Systeme.io MCP to Claude Desktop

Add this block to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows), then restart Claude Desktop. Cursor and Codex use a similar schema.

{
  "mcpServers": {
    "systeme-io": {
      "command": "npx",
      "args": ["mcp-remote", "<YOUR_MCP_URL>"]
    }
  }
}
// HTTP-transport MCP. Get your <YOUR_MCP_URL> from the vendor dashboard.
// Server source: https://mcp.systeme.io/mcp
// Claude Code (one-liner): claude mcp add systeme-io <YOUR_MCP_URL> --transport http

Some MCP servers require an API key. Check the source page for setup: mcp.systeme.io/mcp.

Does Systeme.io MCP cost extra?

Included with subscription

Systeme.io ships an official MCP server that uses your existing subscription credentials.

  • No separate MCP licence to buy. You pay for your Systeme.io plan, the MCP server queries that account.
  • Whether it's gated to a specific tier wasn't extracted automatically — verify the access requirements on the MCP page or pricing docs.

Systeme.io subscription pricing

PlanMonthlyAnnual / mo
FreeFree—
Startup$17—
Webinar$47—
Unlimited$97—

Source: systeme.io/pricing. Verified 2026-06-07.

Systeme.io also publishes a REST API

Systeme.io publishes an API, but per-tier gating wasn't extracted automatically.

Auth method
api_key
SDK languages
—
OpenAPI spec
—
Webhooks
—
Structured outputs
—
See Systeme.io API page

What you can do with Systeme.io from an AI agent

Three shapes of agent workflow. Pick the row that matches how you actually use Claude / Cursor / Codex day to day.

INDIE / SOLO

Skip the dashboard, ask Claude

  • "What changed this week?" answered in seconds
  • Quick one-off questions without leaving the editor
  • Pipe Systeme.io data into your personal notes / docs without writing a script
Effort: 30 seconds — paste the config, restart Claude
AGENCY

Run client analysis at agent speed

  • Hand the MCP server to your team — every consultant can ask Claude about any client's Systeme.io account
  • Multi-account workflows without context-switching the Systeme.io UI
  • Reports you'd normally spend hours on, done before standup
Effort: An afternoon — set up auth per client
IN-HOUSE TEAM

Production agent workflows

  • Embed in your internal Codex / Cursor agents that triage Systeme.io data daily
  • Combine with other MCP servers in a multi-step agent chain
  • Constrain agents to read-only roles to keep production Systeme.io safe
Effort: Days — security review + role config

Limits and gotchas

  • Official MCP server — published by Systeme.io themselves, so it should track product changes.
  • Fallback: the REST API works for any flow the MCP server doesn't cover.
  • Auth flow: MCP servers usually inherit the underlying API auth method (api_key). Expect to configure that on first install.
  • Rate limits: MCP calls count against your underlying Systeme.io API quota. Burst usage from a curious agent can drain a daily allowance fast.
7/10

Agent-readiness verdict

An official, write-capable MCP server that runs on Systeme.io's free plan, covering contacts, tags, and newsletters through ChatGPT or Claude. It scores 7 out of 10: rare free-tier agent access with real write tools, held back by API-key auth with 90-day expiry (OAuth is planned) and funnel support limited to opt-in steps.

Official MCP verified 2026-07-08: mcp.systeme.io/mcp, API-key auth (X-MCP-Key header or mcpKey param, 90-day keys, max 2), FREE PLAN, ChatGPT+Claude, contacts/tags/newsletters/opt-in-funnels write tools, rate-limited. OAuth planned. 4->7 Joonas approved.

MCP server availablePublic API with docs

Scored 2026-07-08 by Joonas (TMB).

Systeme.io MCP & API FAQ

Is the Systeme.io MCP server official?+
Yes — an official, vendor-maintained server at https://mcp.systeme.io/mcp.
Can I use the Systeme.io MCP with Cursor or Codex?+
Yes — MCP is a protocol, not Claude-specific. Any MCP-capable client (Cursor, Codex, Windsurf, Zed) can use the same server config with minor path adjustments.
Does Systeme.io have a public API?+
Yes — public REST API at developer.systeme.io, auth via api_key.

Sources

Data verified by Joonas on the dates shown. MCP server status auto-rechecked weekly.

Joonas Rotko
Joonas RotkoAuthor & Founder of That Marketing Buddy

10+ years in digital marketing. I review marketing software for AI-stack fit: real pricing, MCP and API support, and how cleanly each tool drops into an AI agent workflow, cross-checked against verified data and real user feedback.

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