Customer.io MCP: Documentation
Updated:
Connection
Endpoint https://mcp.customer.io, HTTP (Streamable) transport, OAuth authorization. The server merges two Customer.io API surfaces — Journeys (campaigns and profiles) and CDP Data Pipelines (event collection) — into one MCP connection.
Tools
8 tools in total; the key ones are cio_read_api (reading: profiles, segments, campaign stats, delivery status) and cio_write_api (writing: events, profile attributes, segment updates). The rest cover supporting operations on the same Journeys and CDP entities.
Agent flow
"Find the segment of users inactive for 30 days", "log a payment-failed event to profile 4821", "show stats for the latest email campaign" — the agent reads and writes CRM/marketing data directly.
Pricing
Customer.io is a paid service (a trial exists, but there's no permanent free tier); the MCP server isn't billed separately and is included with the connected account.