List Files

GET/v1/files

List Files

Query parameters

ids: optional array of string

Restrict the result set to Files whose id is in this list. At most 100 entries (after de-duplication). Mutually exclusive with page and limit. When supplied, the response is always a single page (next_page is null). IDs that do not resolve to a visible File — including deleted Files — are silently omitted.

limit: optional number

Number of items to return per page.

Defaults to 20. Ranges from 1 to 1000.

default20

maximum1000

minimum1

page: optional string

Opaque page cursor returned in a prior list response's next_page. Prefixed page_.

Returns

data: array of FileMetadata { id, created_at, filename, 5 more }

List of file metadata objects.

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.

formatdate-time

filename: string

Original filename of the uploaded file.

maxLength500

minLength1

mime_type: string

MIME type of the file.

maxLength255

minLength1

size_bytes: number

Size of the file in bytes.

minimum0

type: "file"

Object type.

For files, this is always "file".

downloadable: optional boolean

Whether the file can be downloaded.

defaultfalse

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.

formatdate-time

next_page: optional string or null

Opaque cursor for the next page. Supply as ?page= to fetch the next page; null when there are no more results.

List Files

curl https://api.anthropic.com/v1/files \
    -H 'anthropic-version: 2023-06-01' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"

{
  "data": [
    {
      "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"
    }
  ],
  "next_page": "next_page"
}

Returns Examples

{
  "data": [
    {
      "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"
    }
  ],
  "next_page": "next_page"
}