### 2.4. Get details for multiple authors at once `POST /graph/v1/author/batch`

一次取回多位作者的详情。

| 参数 | 必填 | 说明 |
|---|---|---|
| `fields` | 否 | 查询参数，不在 body 里 |
| `ids` | 是 | JSON body：`{"ids": [...]}`，最多 1000 个 |

```bash
curl -X POST "https://fetchpaper.com/graph/v1/author/batch?fields=name,paperCount,citationCount,hIndex" \
     -H "Content-Type: application/json" \
     -d '{"ids":["40348417","AuthorId:1751096"]}'
```

```json
[{"authorId": "40348417", "name": "Ashish Vaswani", "paperCount": 50, "citationCount": 218026, "hIndex": 25},
 {"authorId": "1751096", "name": "Namrata Vaswani", "paperCount": 159, "citationCount": 4867, "hIndex": 35}]
```

`ids` 的元素形态判据与 1.9 完全同一套（字符串与 JSON 整数都解析，布尔/浮点/对象/数组给 `null`，一槽一条不去重）。超上限回 400 `Too many ids: 1001 (max 1000)`；`GET /graph/v1/author/batch` 回 405 `Author batch lookup requires POST`。