GET /text/topics

openalex.org:openalex-api

Summary: Classify text (Aboutness)
Operation ID: classifyText
Auth: unknown
Description

**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.

Parameters (3)

abstract (string, query, optional)

Abstract text to classify

api_key (string, query, required)

Your OpenAlex API key (required). Get a free key at https://openalex.org/settings/api

title (string, query, optional)

Title text to classify

Examples (3)

TitleTypeURLAction
Classify text with abstract only curl https://api.openalex.org/text/topics?abstract=Machine%20learning%20techniques%20have%20revolutionized%20natural%20language%20processing%20tasks%2C%20enabling%20significant%20advancements%20in%20sentiment%20analysis%2C%20machine%20translation%2C%20and%20question%20answering%20systems.%20This%20study%20examines%20the%20application%20of%20transformer-based%20architectures%20to%20large-scale%20text%20classification%20problems.
Classify text with title only curl https://api.openalex.org/text/topics?title=Climate%20Change%20Impacts%20on%20Global%20Agriculture%3A%20A%20Meta-Analysis
Classify text with both title and abstract curl https://api.openalex.org/text/topics?title=CRISPR-Cas9%20Gene%20Editing%20in%20Cancer%20Immunotherapy&abstract=This%20review%20explores%20the%20potential%20of%20CRISPR-Cas9%20technology%20in%20enhancing%20adoptive%20cell%20therapies%20for%20cancer%20treatment.%20We%20discuss%20strategies%20for%20genetic%20modification%20of%20T-cells%2C%20challenges%20in%20delivery%20systems%2C%20and%20emerging%20clinical%20trial%20results.

Probe History

Latency

Status Codes

TimeStatusLatencySize
2026-03-23 10:25:36.891332 200 1794ms
2026-03-23 10:11:39.674336 400 521ms
2026-03-23 09:20:30.015549 200 2567ms

Response Changes

WhenOldNew
2026-03-23 10:11:39.674336 056c8f98b5d0 aa54b38f799b
2026-03-23 10:25:36.891332 aa54b38f799b d8baef0463cb