---
title: "Get properties of an extension topic."
method: GET
path: "/{scope}/providers/Microsoft.EventGrid/extensionTopics/default"
tags: ["Topics"]
---

# Get properties of an extension topic.

`GET /{scope}/providers/Microsoft.EventGrid/extensionTopics/default`

Get the properties of an extension topic.

## Parameters

- `../../../../../../common-types/resource-management/v6/types.json#/components/parameters/ScopeParameter` — unresolved $ref
- `../../../../../../common-types/resource-management/v6/types.json#/components/parameters/ApiVersionParameter` — unresolved $ref

## Response `200`

OK

- ExtensionTopic — Definition of a Resource.
  - `id` string — Fully qualified identifier of the resource.
  - `name` string — Name of the resource.
  - `type` string — Type of the resource.

## Other responses

- `default` — *** Error Responses: *** * 400 Bad Request. * 500 Internal Server Error.

## Changes

- **2026-07-13** (2017-06-15-preview) `285f714f3339` — 1 warning, 2 info
  - deleted the `path` request parameter `scope`
  - api tag `Topics` added
  - api tag `ExtensionTopics` removed
- **2026-07-13** (2017-06-15-preview) `6114a105ef69` — 1 warning, 2 info
  - deleted the `query` request parameter `api-version`
  - api tag `ExtensionTopics` added
  - api tag `Topics` removed
- **2026-07-13** (2017-06-15-preview) `04232a2819a1` — 1 info
  - endpoint added
- **2026-07-13** (2017-06-15-preview) `622990cd7696` — 1 breaking
  - api path removed without deprecation
- **2026-07-13** (2017-06-15-preview) `93474e2eb953` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/azure/apis/eventgrid-microsoft-eventgrid-eventgrid/changes/:scope/providers/Microsoft.EventGrid/extensionTopics/default/get.md)

---

[API](https://skmtc.dev/azure/apis/eventgrid-microsoft-eventgrid-eventgrid.md) · [All operations](https://skmtc.dev/azure/apis/eventgrid-microsoft-eventgrid-eventgrid/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/azure/eventgrid-microsoft-eventgrid-eventgrid/revisions/285f714f3339/schema)