> 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/ncbi-taxon.md).

# Search NCBI Taxonomy in Duaer

In Duaer, search taxa via NCBI Taxonomy ontology. One successful search uses 1 credit.
## What you get

NCBI Taxonomy in the Duaer data market uses 1 credit per successful search.

Related: [Organisms](/getting-started/organisms.md).

## Search on the canvas

1. Open the node creator, select Duaer Data, then NCBI Taxonomy.
2. Enter Words (default Homo sapiens) 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/ncbi-taxon?...
- Authorization: Bearer <Duaer key>

Below is the same English call skill as Copy skill.

## Call skill

Same text as Copy skill.

```
---
name: duaer-ncbi-taxon
description: >-
  Search taxa via NCBI Taxonomy ontology through Duaer.
  One successful search uses 1 Duaer credit.
---

# Duaer NCBI Taxonomy

Search taxa via NCBI Taxonomy ontology through Duaer with a Duaer key.

## Call

`GET https://api.duaer.com/v1/data/ncbi-taxon?words=Homo%20sapiens&limit=10`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Provide `words` or `id`.
- `words` — taxon words, such as Homo sapiens.
- `id` — optional. NCBITaxon id such as NCBITaxon:9606.
- `limit` — optional. From 1 to 20. Default 10.

## Result

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

```
## Questions

### How many credits does a NCBI Taxonomy search use in Duaer?

One successful search uses 1 credit.