---
title: "Check topic subscriber"
method: GET
path: "/v1/topics/{topicKey}/subscribers/{externalSubscriberId}"
tags: ["Topics"]
---

# Check topic subscriber

`GET /v1/topics/{topicKey}/subscribers/{externalSubscriberId}`

## Request

- Base URL: `https://example.com/api`
- URL: `https://example.com/api/v1/topics/{topicKey}/subscribers/{externalSubscriberId}`
- Auth: API key in header `Authorization`

Check if a subscriber belongs to a certain topic

## Path parameters

- `topicKey` string, required
- `externalSubscriberId` string, required

## Response `200`

- TopicSubscriberDto
  - `_organizationId` string, required
  - `_environmentId` string, required
  - `_subscriberId` string, required
  - `_topicId` string, required
  - `topicKey` string, required
  - `externalSubscriberId` string, required

---

[API](https://skmtc.dev/cequens/apis/omni-link-api.md) - [All operations](https://skmtc.dev/cequens/apis/omni-link-api/llms.txt) - [OpenAPI document](https://skmtc.dev/cequens/apis/omni-link-api/revisions/bf6b01359cfd?raw)