Customer.io MCP by usefulapi

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Chat & email

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

https://customerio.usefulapi.io/mcp

claude mcp add --transport http customerio https://customerio.usefulapi.io/mcp

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

{
  "servers": {
    "customerio": {
      "type": "http",
      "url": "https://customerio.usefulapi.io/mcp"
    }
  }
}

https://customerio.usefulapi.io/mcp

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

• customerio_search_customers

  Search/list people by a Customer.io filter (segment or attribute conditions). e.g. filter={"segment":{"id":7}} or {"and":[...]}. App API: POST /v1/customers.

• customerio_get_customer_attributes

  Get a single person's attributes (profile fields). App API: GET /v1/customers/{customer_id}/attributes.

• customerio_get_customer_segments

  List the segments a single person belongs to. App API: GET /v1/customers/{customer_id}/segments.

• customerio_get_customer_messages

  List messages (deliveries) sent to a single person. App API: GET /v1/customers/{customer_id}/messages.

• customerio_list_segments

  List all segments in the workspace (id + name + type). App API: GET /v1/segments.

• customerio_list_campaigns

  List all campaigns in the workspace. App API: GET /v1/campaigns.

• customerio_get_campaign

  Get a single campaign by id. App API: GET /v1/campaigns/{campaign_id}.

• customerio_get_campaign_metrics

  Get delivery/engagement metrics for a campaign over time. App API: GET /v1/campaigns/{campaign_id}/metrics.

• customerio_list_messages

  List sent messages (deliveries) across the workspace, filterable by type/campaign/newsletter. App API: GET /v1/messages.

• customerio_list_exports

  List data exports in the workspace. App API: GET /v1/exports.

• customerio_list_collections

  List reusable data collections in the workspace. App API: GET /v1/collections.

• customerio_send_transactional_email

  ⚠️ SENDS A REAL EMAIL. Send a transactional email using a transactional message template. Delivers immediately to the `to` recipient. App API: POST /v1/send/email.

• customerio_trigger_broadcast

  ⚠️ SENDS TO REAL RECIPIENTS. Trigger an API-triggered broadcast, delivering to the resolved recipient set. App API: POST /v1/send/broadcast (posts to /v1/campaigns/{broadcast_id}/triggers).

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 13 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 13 tool descriptions and found no hidden instructions to the AI

Compared with others in Chat & emaili

• More stars than 0% of the other 1762 servers in this category
• Published to the registry more recently than 95% of the other 1762 servers in this category
• Basic checks equal to or better than 100% of the other 1762 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

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