> 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/usda-fdc.md).

# Search USDA FoodData Central in Duaer

In Duaer, search foods in USDA FoodData Central. One successful search uses 1 credit.
## What you get

USDA FoodData Central in the Duaer data market uses 1 credit per successful search.

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

## Search on the canvas

1. Open the node creator, pick Duaer Data → USDA FoodData Central .
2. Fill Words (default apple) or ID.
3. Limit defaults to 10, max 20. Execute.

A successful search uses 1 credit.

## Call the API

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

The call skill below matches Copy skill.

## Call skill

Same text as Copy skill.

```
---
name: duaer-usda-fdc
description: >-
  Search foods in USDA FoodData Central through Duaer.
  One successful search uses 1 Duaer credit.
---

# Duaer USDA FoodData Central

Search foods in USDA FoodData Central through Duaer with a Duaer key.

## Call

`GET https://api.duaer.com/v1/data/usda-fdc?words=apple&limit=10`

Provide `words` or `id`.
- `words` — food name, such as apple.
- `id` — optional. FDC id such as 1750340.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `fdcId`, `dataType`, and `brandOwner`.

```
## Questions

### How many credits does a USDA FoodData Central search use in Duaer?

One successful search uses 1 credit.