---
title: "Get subscriber by external ID path"
method: GET
path: "/subscribers/external/{externalId}"
tags: ["Subscribers"]
---

# Get subscriber by external ID path

`GET /subscribers/external/{externalId}`

Compatibility route for external IDs that do not contain path separators. Use `/subscribers/external?externalId=...` for IDs containing slashes.

## Path parameters

- `externalId` string, required

## Query parameters

- `includeMachineEngagement` boolean

## Response `200`

Successful response

- object
  - `success` boolean
  - `subscriber` DetailedSubscriber
    - `id` string
    - `email` string, email
    - `externalId` string, nullable — Customer-owned app/customer/user ID for this subscriber
    - `firstName` string, nullable
    - `lastName` string, nullable
    - `status` 'active' | 'unsubscribed' | 'bounced'
    - `emailProvider` string, nullable
    - `tags` string[]
    - `customAttributes` object
    - `createdAt` string, date-time
    - `updatedAt` string, date-time
    - `lists` SubscriberListMembership[]
      - `id` string
      - `name` string
      - `description` string, nullable
      - `isPrivate` boolean, nullable
      - `subscribedAt` string, date-time
      - `unsubscribedAt` string, date-time, nullable
    - `sequenceEnrollments` SubscriberSequenceEnrollment[]
      - `tokenId` string
      - `sequenceId` string
      - `sequenceName` string
      - `sequenceStatus` string
      - `enrollmentStatus` string
      - `currentNodeId` string
      - `currentNodeType` string, nullable
      - `currentNodeLabel` string, nullable
      - `scheduledFor` string, date-time, nullable
      - `enteredAt` string, date-time
      - `updatedAt` string, date-time
    - `emailStats` SubscriberEmailStats
      - `sent` integer
      - `delivered` integer
      - `opened` integer
      - `clicked` integer
      - `bounced` integer
      - `unsubscribed` integer
      - `complained` integer
    - `activity` SubscriberActivityEvent[]
      - `id` string
      - `eventType` string
      - `eventTime` string, date-time
      - `emailSendId` string, nullable
      - `campaignId` string, nullable
      - `clickedUrl` string, nullable
      - `machine` boolean — Whether this open/click event is classified as bot/scanner activity.
      - `engagementQuality` 'human' | 'machine' | 'asset', nullable — Engagement classification for open/click events.
      - `classificationReasons` string[] — Classification reason codes for open/click events.
      - `bounceType` string, nullable
      - `eventName` string, nullable
      - `properties` object, nullable

## Other responses

- `404` — Subscriber not found

## Changes

- **2026-06-19** `fd494fa7e64d` — 4 info
  - added the new optional `query` request parameter `includeMachineEngagement`
  - added the optional property `subscriber/allOf[subschema #2]/activity/items/classificationReasons` to the response with the `200` status
  - added the optional property `subscriber/allOf[subschema #2]/activity/items/engagementQuality` to the response with the `200` status
  - added the optional property `subscriber/allOf[subschema #2]/activity/items/machine` to the response with the `200` status
- **2026-05-05** `5449b620579f` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/sequenzy/apis/sequenzy-api/changes/subscribers/external/:externalId/get.md)

---

[API](https://skmtc.dev/sequenzy/apis/sequenzy-api.md) · [All operations](https://skmtc.dev/sequenzy/apis/sequenzy-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sequenzy/sequenzy-api/revisions/fd494fa7e64d/schema)