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$client->files->upload(string file, ?int expiresInSeconds, ?string workspaceID): FileMetadata
POST/v1/files

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Parameters
file: string

The file to upload. Only the final path component of the part's filename is kept; an absent or empty filename is replaced with unnamed plus the extension for the file's stored mime_type, when known.

expiresInSeconds?:optional int

Seconds from upload until the file expires and its bytes become permanently unavailable. Must be between 3600 (one hour) and 7776000 (ninety days).

workspaceID?:optional string
Returns
class FileMetadata { $type = 'file'; $id; $createdAt; /* 5 more */ }
"file" type

Object type.

For files, this is always "file".

string id

Unique object identifier.

The format and length of IDs may change over time.

\Datetime createdAt

RFC 3339 datetime string representing when the file was created.

string filename

Original filename of the uploaded file.

string mimeType

MIME type of the file.

int sizeBytes

Size of the file in bytes.

?bool downloadable

Whether the file can be downloaded.

?\Datetime expiresAt

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.

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<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'my-anthropic-api-key');

$fileMetadata = $client->files->upload(
  file: FileParam::fromString('Example data', filename: uniqid('file-upload-', true)),
  expiresInSeconds: 3600,
  workspaceID: 'wrkspc_011CZkZaBF1tNoB5wlCeusgy',
);

var_dump($fileMetadata);
Returns Examples
Response 200
{
  "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"
}