# Research articles (/docs/proof-points/research-articles)



Research-article proof points come from indexed scholarly documents. Date filters apply to **published date**.

**Endpoints:**

* `POST /proof-points/research-articles/search` — [playground](/docs/api-reference/endpoints/search_research_articles_proof_points_research_articles_search_post)
* `POST /proof-points/research-articles/time-series` — [playground](/docs/api-reference/endpoints/research_articles_time_series_proof_points_research_articles_time_series_post)
* `POST /proof-points/research-articles/correlation-matrix` — [playground](/docs/api-reference/endpoints/research_articles_correlation_matrix_proof_points_research_articles_correlation_matrix_post)

## Typical Questions [#typical-questions]

* Is this trend still primarily academic, or already commercial?
* Which topics are gaining scientific attention fastest?
* What publications support a trend narrative?

## Type-specific filters [#type-specific-filters]

On top of the [shared proof-point fields](/docs/proof-points):

* `journals` — journal names
* `dois`
* `workTypes` — scholarly work types from the index

## Request Patterns [#request-patterns]

### Search [#search]

```json
{
  "query": "precision fermentation",
  "topicIds": ["11111111-1111-1111-1111-111111111111"],
  "start": "2022-01-01T00:00:00Z",
  "end": "2024-12-31T23:59:59Z",
  "take": 25,
  "sortColumn": "published_at",
  "sortDirection": "desc"
}
```

### Time series [#time-series]

```json
{
  "topicIds": ["11111111-1111-1111-1111-111111111111"],
  "resolution": "year",
  "start": "2018-01-01T00:00:00Z",
  "end": "2024-12-31T23:59:59Z"
}
```

## Response Notes [#response-notes]

Each article can include `journal`, `journalAbbr`, `journalIssnL`, `doi`, `forwardCitationCount`, and `workType`, plus shared document fields. Time series returns `labels` and `counts`.