> 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/sequence-ontology.md).

# Search Sequence Ontology in Duaer

In Duaer, search sequence feature terms via Sequence Ontology. One successful search uses 1 credit.
## What you get

Sequence Ontology in the Duaer data market uses 1 credit per successful search.

Related: [Gene Ontology](/getting-started/gene-ontology.md).

## Search on the canvas

1. Open the node creator, select Duaer Data, then Sequence Ontology.
2. Enter Words (default exon) or an id.
3. Limit defaults to 10, max 20.

A successful search uses 1 credit.

## Call the API

- GET https://api.duaer.com/v1/data/sequence-ontology?...
- Authorization: Bearer <Duaer key>

Below is the same English call skill as Copy skill.

## Call skill

Same text as Copy skill.

```
---
name: duaer-sequence-ontology
description: >-
  Search sequence feature terms via Sequence Ontology through Duaer.
  One successful search uses 1 Duaer credit.
---

# Duaer Sequence Ontology

Search sequence feature terms via Sequence Ontology through Duaer with a Duaer key.

## Call

`GET https://api.duaer.com/v1/data/sequence-ontology?words=exon&limit=10`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Provide `words` or `id`.
- `words` — feature words, such as exon.
- `id` — optional. SO id such as SO:0000147.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `soId`, `description`, `synonyms`, and `iri`.

```
## Questions

### How many credits does a Sequence Ontology search use in Duaer?

One successful search uses 1 credit.