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Customer.io MCP by usefulapi

by io.usefulapi
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Send transactional email

customerio_send_transactional_email
Destructive

⚠️ 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.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
toYesRecipient email address.
bodyNoOverride the email body.
fromNoOverride the sender address.
subjectNoOverride the subject line.
identifiersYesPerson identifiers, e.g. {"id":"..."} or {"email":"..."}.
message_dataNoTemplate variables (liquid) to interpolate into the message.
send_to_unsubscribedNoIf true, send even to unsubscribed recipients.
transactional_message_idYesThe transactional message template id (or trigger name).
disable_message_retentionNoIf true, don't retain the message body.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • removedInput schema / properties / transactional_message_id / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "number"
-  }
-]
    • addedInput schema / properties / transactional_message_id / type
      Added value: +[
+  "string",
+  "number"
+]
  2. First observed

TDQS

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