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

# Check topic subscriber

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

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/authentication.md) · [All operations](https://skmtc.dev/cequens/apis/authentication/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/cequens/authentication/revisions/deadb0661f19/schema)