---
title: "Changes to Get topic by ID"
method: GET
path: "/api/v1/topics/{topicId}"
---

# Changes to Get topic by ID

`GET /api/v1/topics/{topicId}`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 1 of 53 revisions.

- **2025-08-08** (v1) `db389f03b097` — 16 breaking

## Changes

- **2025-08-08** (v1) `db389f03b097` — 16 breaking
  - the response property `_status/messages/items/data` became nullable for the status `400`
  - the response property `_status/messages/items/data` became nullable for the status `404`
  - the response property `_status/messages/items/detail` became nullable for the status `400`
  - the response property `_status/messages/items/detail` became nullable for the status `404`
  - the response property `admin_key` became nullable for the status `200`
  - the response property `auto_renew_account` became nullable for the status `200`
  - the response property `auto_renew_period` became nullable for the status `200`
  - the response property `created_timestamp` became nullable for the status `200`
  - the response property `custom_fees/fixed_fees/items/collector_account_id` became nullable for the status `200`
  - the response property `custom_fees/fixed_fees/items/denominating_token_id` became nullable for the status `200`
  - the response property `deleted` became nullable for the status `200`
  - the response property `fee_exempt_key_list/items/` became nullable for the status `200`
  - the response property `fee_schedule_key` became nullable for the status `200`
  - the response property `submit_key` became nullable for the status `200`
  - the response property `timestamp/to/allOf[#/components/schemas/TimestampNullable]/` became nullable for the status `200`
  - the response property `topic_id` became nullable for the status `200`

---

[Operation](https://skmtc.dev/hiero-ledger/apis/mirror-node-rest-api/docs/api/v1/topics/:topicId/get.md) · [API](https://skmtc.dev/hiero-ledger/apis/mirror-node-rest-api.md) · [Page](https://skmtc.dev/hiero-ledger/apis/mirror-node-rest-api/changes/api/v1/topics/:topicId/get)