---
title: "Classify text (Aboutness)"
method: GET
path: "/text/topics"
tags: ["Topics"]
deprecated: true
---

# Classify text (Aboutness)

`GET /text/topics`

> **Deprecated.**

**DEPRECATED:** This endpoint is deprecated and not recommended for new projects. It will not receive updates or support.

Classify arbitrary text to find relevant OpenAlex topics. Costs $0.01 per request.

## Query parameters

- `title` string
- `abstract` string
- `api_key` string, required

## Response `200`

Successful response

- TextClassificationResponse
  - `meta` object
    - `count` integer
  - `results` WorkTopic[]
    - `id` string
    - `display_name` string
    - `score` number
    - `subfield` object — The parent [subfield](/api-reference/subfields)
      - `id` string
      - `display_name` string
    - `field` object — The parent [field](/api-reference/fields)
      - `id` string
      - `display_name` string
    - `domain` object — The parent [domain](/api-reference/domains)
      - `id` string
      - `display_name` string

## Other responses

- `400` — Bad request - invalid parameters
- `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)