---
title: "Get a single topic"
method: GET
path: "/topics/{id}"
tags: ["Topics"]
---

# Get a single topic

`GET /topics/{id}`

Retrieve a single topic by OpenAlex ID.

## Path parameters

- `id` string, required

## Query parameters

- `select` string
- `api_key` string, required

## Response `200`

Successful response

- Topic — A research topic automatically assigned to works
  - `id` string — The OpenAlex ID for this topic.
  - `display_name` string — The English-language label of the topic.
  - `description` string — A description of this topic, generated by AI.
  - `keywords` string[] — Keywords representing the content of papers in the topic.
  - `subfield` object — The subfield (third level) containing this topic:
    - `id` string
    - `display_name` string
  - `field` object — The field (second level) containing this topic:
    - `id` string
    - `display_name` string
  - `domain` object — The domain (highest level) containing this topic:
    - `id` string
    - `display_name` string
  - `works_count` integer — The number of works tagged with this topic.
  - `cited_by_count` integer
  - `ids` object — External identifiers:
    - `openalex` string
    - `wikipedia` string
  - `works_api_url` string
  - `created_date` string, date
  - `updated_date` string, date-time — When this topic was last updated (ISO 8601 datetime).

## Other responses

- `404` — Entity not found
- `429` — Rate limit exceeded

---

[API](https://skmtc.net/openalex/apis/openalex-api.md) · [All operations](https://skmtc.net/openalex/apis/openalex-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/openalex/openalex-api/revisions/60b6c8bd0799/schema)