> 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/efo.md).

# Search EFO in Duaer

In Duaer, search traits and experimental factors via EFO. One successful search uses 1 credit.
## What you get

EFO in the Duaer data market returns experimental-factor codes, names, and synonyms. One successful search uses 1 credit.

Add the node from the [Duaer Data category](/getting-started/duaer-data.md) (EFO), or copy the skill on the [data market](/getting-started/data-market.md). Related: [GWAS](/getting-started/gwas.md).

## Search on the canvas

1. Open the node creator, select Duaer Data, then EFO.
2. Enter Words (a new node starts with asthma), or an EFO id.
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/efo?...
- 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-efo
description: >-
  Search experimental factors via EFO through Duaer.
  One successful search uses 1 Duaer credit.
---

# Duaer EFO

Search experimental factors via EFO through Duaer with a Duaer key.

## Call

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

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Provide `words` or `id`.
- `words` — trait or factor words, such as asthma.
- `id` — optional. EFO id such as EFO:0000270.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `efoId`, `description`, `synonyms`, and `iri`.
Related gwas: https://skills.duaer.com/gwas.md.
Related phenotypes: https://skills.duaer.com/phenotypes.md.

```
## Questions

### How many credits does an EFO search use in Duaer?

One successful EFO search in Duaer uses 1 credit.