> For the complete documentation index, see [llms.txt](https://doc.duaer.com/zh/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/zh/getting-started/census.md).

# 在 Duaer 里查美国人口普查 ACS

在 Duaer 里：美国人口普查局 ACS 五年数据：按州或县查人口、家庭收入、年龄、房价、房租与贫困率。一次成功查询用 1 额度。
## 能拿到什么

Duaer 数据市场里的「美国人口普查 ACS」：美国人口普查局 ACS 五年数据：按州或县查人口、家庭收入、年龄、房价、房租与贫困率。查到结果时用 1 额度，结果交给数字组织的下一个节点。

从节点创建器选 Duaer 数据 → 美国人口普查 ACS，或打开 [数据市场](/zh/getting-started/data-market.md)。相关：[美国联邦机构预算](/zh/getting-started/usaspending.md)、[世界银行指标](/zh/getting-started/world-bank.md)。

## 适合做什么

- 按家庭收入中位数给美国各州排名。
- 找出某州贫困率最高的县。

## 在画布里检索

1. 打开节点创建器，选 Duaer 数据 → US Census ACS。
2. 填 Measure（如 medianIncome）；State（如 CA）、Place Words 可选。
3. Limit 默认 10，最大 20。执行。

查到结果才扣 1 额度；没有结果、输入有误或上游失败都不扣。

## 用 API 调用

- GET https://api.duaer.com/v1/data/census?measure=medianIncome
- Authorization: Bearer <Duaer key>

下方是与数据市场「复制技能」相同的英文技能，含参数、示例与返回字段。

## 调用技能（英文）

与数据市场「复制技能」一致。

```
---
name: duaer-census
description: >-
  Duaer US Census ACS. US Census American Community Survey 5-year: population, household income, age, home value, rent, and poverty by state or county.
  One successful search uses 1 Duaer credit.
---

# Duaer US Census ACS

Duaer US Census ACS reads one measure from the American Community Survey 5-year estimates (2020–2024) for every state, or for the counties of one state, highest first. Duaer holds the upstream API key; you only send your Duaer key.

## When to use

- Rank US states by median household income.
- Find the counties in a state with the highest poverty rate.

## When not to use

- Country comparisons. Use https://skills.duaer.com/world-bank.md.
- Federal spending. Use https://skills.duaer.com/usaspending.md.

## Call

`GET https://api.duaer.com/v1/data/census?measure=medianIncome`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Get a Duaer key: https://skills.duaer.com/keys.md

## Parameters

Provide `measure`, and optionally `state`.

- `measure` — `population`, `medianIncome`, `medianAge`, `medianHomeValue`, `medianRent`, or `povertyRate`. Default population.
- `state` — Optional. Two-letter code such as CA; rows are then its counties.
- `words` — Optional. Words in the place name, such as Los Angeles.
- `limit` — Optional. Rows to return, from 1 to 20. Default 10.

## Examples

- `GET https://api.duaer.com/v1/data/census?measure=medianIncome` — states by median household income.
- `GET https://api.duaer.com/v1/data/census?measure=povertyRate&state=TX` — Texas counties by poverty rate.

## Result

The response is `{ "items": [...] }`. Each item has `source`, `title`, `url`, and `summary`, plus:

- `name`, `measure`, `value`, `unit` — place, measure, figure, and unit.
- `stateFips`, `countyFips` — FIPS codes.
- `year` — last year of the 5-year window.

Fields without a value are left out.

## Credits

A search that returns at least one row uses 1 credit.
An empty search, a search that finds nothing, or a failed search uses 0.
Wrong input returns 400 with a message and uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

## Related

- https://skills.duaer.com/usaspending.md — Duaer US federal agency budgets
- https://skills.duaer.com/world-bank.md — Duaer World Bank indicators

```
## Questions

### Duaer 的美国人口普查 ACS检索扣多少额度？

查到结果时扣 1 额度；没有结果或出错不扣。

### Duaer 美国人口普查 ACS 是哪一年的数据？

Duaer 使用 ACS 五年估计 2020–2024，数值是五年平均，适合比较地区，不适合看单年变化。

## 相关

- [在 Duaer 里查美国联邦机构预算](https://doc.duaer.com/zh/getting-started/usaspending.md)
- [在 Duaer 里查世界银行指标](https://doc.duaer.com/zh/getting-started/world-bank.md)