MCP Server: io.usefulapi/customerio

The MCP server io.usefulapi/customerio provides an interface to query people, segments, campaigns, and message deliveries, and to send transactional email or broadcasts. Its description indicates support for both data retrieval (for Customer.io entities) and outbound messaging actions.

🛠️ Key Features

Query people
Query segments
Query campaigns
Query message deliveries
Send transactional email
Send broadcasts

🚀 Use Cases

Retrieve Customer.io data about people, segments, campaigns, and delivery history
Look up campaign-related delivery details
Trigger transactional email sending
Initiate broadcast messaging

⚡ Developer Benefits

Centralized access to query operations for core Customer.io objects
Single server workflow supporting both reads (queries) and writes (email/broadcast sending)

⚠️ Limitations

Available details only specify query and sending capabilities; no additional tooling, authentication, or configuration details are provided

Customer.io MCP by usefulapi

Manage your Customer.io people, segments, campaigns, and messaging from Claude, Cursor, or any MCP client. Hosted, no local install — connect with your Customer.io API credentials.

Live endpoint: https://customerio.usefulapi.io/mcp · Homepage: https://usefulapi.io/customerio

Add to Claude

json

{
  "mcpServers": {
    "customerio": {
      "url": "https://customerio.usefulapi.io/mcp"
    }
  }
}

On first connect you'll paste your Customer.io API key(s). It's validated, stored per-user, and scoped to you.

Tools

Tool	Type	What it does
`customerio_search_customers`	read	Search customers
`customerio_get_customer_attributes`	read	Get customer attributes
`customerio_get_customer_segments`	read	Get customer segments
`customerio_get_customer_messages`	read	Get customer messages
`customerio_list_segments`	read	List segments
`customerio_list_campaigns`	read	List campaigns
`customerio_get_campaign`	read	Get campaign
`customerio_get_campaign_metrics`	read	Get campaign metrics
`customerio_list_messages`	read	List messages
`customerio_list_exports`	read	List exports
`customerio_list_collections`	read	List collections
`customerio_send_transactional_email`	write	Send transactional email
`customerio_trigger_broadcast`	write	Trigger broadcast
`customerio_usage_status`	meta	Usage status (free-tier meter)
`customerio_upgrade`	meta	Upgrade to Pro (unlimited)

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage or manage your subscription.

Pricing

Plan	Price	Limit
Free	$0	100 tool calls / month
Pro	$9/mo or $90/yr (2 months free)	Unlimited

License

MIT — see LICENSE. Documentation only; the server is hosted.

Customerio