> 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/mona.md).

# 在 Duaer 里查 MoNA 参考谱图

在 Duaer 里按 InChIKey 或化合物名查 MoNA 参考 MS/MS 谱图。一次成功查询用 1 额度。
## 能拿到什么

Duaer 数据市场里的「MoNA spectra」一次成功查询 1 额度，查不到结果也算一次。

每张谱图带峰列表，可与未知谱图比对。

逐步处理未知特征见 [用 Duaer 注释未知特征](/zh/getting-started/metabolic-dark-matter.md)。

## 在画布里检索

1. 打开节点创建器，选 Duaer 数据 → MoNA spectra。
2. 填 InChIKey（如质量候选物的结果），或 Compound name（默认 glucose）。
3. Limit 默认 10，最大 20。执行。

成功扣 1 额度；输入为空或来源失败不扣。

## 用 API 调用

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

下方是与「复制技能」相同的英文技能。

## 调用技能（英文）

与数据市场「复制技能」一致。

```
---
name: duaer-mona
description: >-
  Find reference MS/MS spectra in MoNA by InChIKey or compound name through Duaer.
  One successful search uses 1 Duaer credit.
---

# Duaer MoNA spectra

Find reference spectra for a compound in MassBank of North America (MoNA) through Duaer with a Duaer key.

## Call

`GET https://api.duaer.com/v1/data/mona?inchikey=WQZGKKKJIJFFOK-GASJEMHNSA-N&limit=5`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

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

Provide `inchikey` or `words`.

- `inchikey` — exact compound, such as a https://skills.duaer.com/mass-candidates.md result.
- `words` — compound name, used when `inchikey` is empty.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `monaId`, `compound`, `formula`, `inchikey`, `msLevel`, `ionMode`, `precursorType`, `precursorMz`, `instrument`, `peakCount`, and `peaks` (`mz:intensity` pairs).
Compare `peaks` with your unknown spectrum, or pass them to https://skills.duaer.com/masst.md.
To work an unannotated feature step by step, follow https://skills.duaer.com/metabolic-dark-matter.md.

## Credits

One successful search uses 1 credit, including a search that finds no match.
Empty input, a failed source, or no remaining credits uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

```
## Questions

### Duaer 的 MoNA spectra 检索扣多少额度？

一次成功扣 1 额度，查不到结果也算一次；输入为空或来源失败不扣。

## 相关

- [用 Duaer 注释未知特征（代谢暗物质）](https://doc.duaer.com/zh/getting-started/metabolic-dark-matter.md)
- [在 Duaer 里匹配 MassBank 谱图](https://doc.duaer.com/zh/getting-started/massbank.md)
- [在 Duaer 里列出质量候选物](https://doc.duaer.com/zh/getting-started/mass-candidates.md)