upload

api/files/upload New page · 77 lines, new page

## Upload File ### Returns ### Example #### Response

A whole new page. There's nothing to diff it against, so here is what it says.

---
title: Upload File
url: https://platform.claude.com/docs/en/api/files/upload
---

## Upload File

**post** `/v1/files`

Upload File

### Returns

- `FileMetadata object { id, created_at, filename, 5 more }`

  - `id: string`

    Unique object identifier.

    The format and length of IDs may change over time.

  - `created_at: string`

    RFC 3339 datetime string representing when the file was created.

  - `filename: string`

    Original filename of the uploaded file.

  - `mime_type: string`

    MIME type of the file.

  - `size_bytes: number`

    Size of the file in bytes.

  - `type: "file"`

    Object type.

    For files, this is always `"file"`.

    - `"file"`

  - `downloadable: optional boolean`

    Whether the file can be downloaded.

  - `expires_at: optional string or null`

    RFC 3339 datetime string representing when the file will expire and become unavailable for download. Null if the file does not expire. For files uploaded with `expires_in_seconds`, this is the upload time plus that value.

### Example

```http
curl https://api.anthropic.com/v1/files \
    -H 'Content-Type: multipart/form-data' \
    -H 'anthropic-version: 2023-06-01' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY" \
    -F 'file=@/path/to/file'
```

#### Response

```json
{
  "id": "file_011CNha8iCJcU1wXNR6q4V8w",
  "created_at": "2025-04-15T18:37:24.100435Z",
  "filename": "document.pdf",
  "mime_type": "application/pdf",
  "size_bytes": 102400,
  "type": "file",
  "downloadable": false,
  "expires_at": "2025-05-15T18:37:24.100435Z"
}
```