> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/getting-started/phenotypes.md).

# Search phenotypes in Duaer

In Duaer, look up HPO phenotype terms via EBI OLS with Duaer Data. One successful search uses 1 credit. This page includes the full English call skill.
## What you get

Phenotypes in the Duaer data market returns HPO terms and ids. One successful search uses 1 credit.

Add the node from the [Duaer Data category](/getting-started/duaer-data.md) (Phenotypes), or copy the skill on the [data market](/getting-started/data-market.md). Related: [Diseases](/getting-started/diseases.md) and [MeSH](/getting-started/mesh.md).

## Search on the canvas

1. Open the node creator, select Duaer Data, then Phenotypes.
2. Enter Words (a new node starts with diabetes), or an HPO id such as HP:0000819.
3. Limit defaults to 10, max 20. Select Execute step.

A successful search uses 1 credit. Production deliverables land in the [data pool](/getting-started/data-pool.md).

## Call the API

- GET https://api.duaer.com/v1/data/phenotypes?...
- Authorization: Bearer <Duaer key>
- words or id is required.

For keys, refer to [Authentication for the Duaer public API](/api/authentication.md). Below is the same English call skill as Copy skill.

## Call skill

Same text as Copy skill on the Duaer data market. Keep it English.

```
---
name: duaer-phenotypes
description: >-
  Look up HPO phenotype terms through Duaer (EBI OLS).
  One successful search uses 1 Duaer credit.
---

# Duaer phenotypes

Look up Human Phenotype Ontology terms through Duaer with a Duaer key (EBI OLS4).

## Call

`GET https://api.duaer.com/v1/data/phenotypes?words=diabetes&limit=10`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Provide `words` or `id` (or both; id wins).

- `words` — HPO phenotype label.
- `id` — optional. HPO id (HP:0000819). Overrides words when set.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `hpoId`, `iri`, and `synonyms`.
Related diseases: https://skills.duaer.com/diseases.md.
Related MeSH: https://skills.duaer.com/mesh.md.

## Credits

One successful search uses 1 credit.
An empty search, a failed search, a compound that matches nothing, or no remaining credits uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

```
## Questions

### How do Duaer phenotypes differ from Diseases?

Phenotypes return HPO clinical phenotype terms. Diseases query MyDisease disease records.

## Related

- [Search diseases in Duaer](https://doc.duaer.com/getting-started/diseases.md)
- [Search MeSH in Duaer](https://doc.duaer.com/getting-started/mesh.md)
- [Search clinical trials in Duaer](https://doc.duaer.com/getting-started/trials.md)
- [Use the Duaer data market](https://doc.duaer.com/getting-started/data-market.md)