Customer.io MCP
DownCustomer.io MCP is Customer.io's official remote MCP server (mcp.customer.io): 8 tools, including cio_read_api and cio_write_api, combine the Journeys API (campaigns, profiles) and CDP Data Pipelines (events) in one connection. Authorization is OAuth. It handles reading segments and writing events that trigger campaigns.
Why this server
- Combines the Journeys API and CDP Data Pipelines in a single MCP connection
- cio_write_api writes events and profile attributes without touching campaign settings by hand
- cio_read_api pulls segments and campaign stats for quick diagnostics
- A remote HTTP endpoint at mcp.customer.io — nothing to install locally
Usage examples
Prompt: Find the segment of users who haven't opened an email in 30 days and show its size
Result: The agent called cio_read_api, retrieved the segment and its size — the data came back with no trip to the Customer.io dashboard.
Prompt: Log a "payment failed" event to customer profile ID 4821
Result: Via cio_write_api the agent wrote the event into the Journeys API — it can immediately trigger the linked campaign for that profile.
Health
1 reports in the last 30 days · Last report: 25 Jul 2026
Reports by day (30 days)
| date | works | partial | broken |
|---|---|---|---|
| 2026-07-25 | 0 | 0 | 1 |
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