Files

Upload File

POST /v1/files

Upload File

Headers

• "anthropic-workspace-id": optional string

Body parameters (form-data)

• 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.

  format: binary

• expires_in_seconds: optional number

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

  minimum: 3600, maximum: 7776000

Returns

• FileMetadata object

  • type: "file"

    Object type.

    For files, this is always "file".

  • 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.

    format: date-time

  • filename: string

    Original filename of the uploaded file.

    maxLength: 500, minLength: 1

  • mime_type: string

    MIME type of the file.

    maxLength: 255, minLength: 1

  • size_bytes: number

    Size of the file in bytes.

    minimum: 0

  • downloadable: optional boolean

    Whether the file can be downloaded.

    default: false

  • 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.

    format: date-time

Example

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 (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"
}

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.

  default: 20, maximum: 1000, minimum: 1

• page: optional string

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

Headers

• "anthropic-workspace-id": optional string

Returns

• data: array of FileMetadata

  List of file metadata objects.

  • type: "file"

    Object type.

    For files, this is always "file".

  • 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.

    format: date-time

  • filename: string

    Original filename of the uploaded file.

    maxLength: 500, minLength: 1

  • mime_type: string

    MIME type of the file.

    maxLength: 255, minLength: 1

  • size_bytes: number

    Size of the file in bytes.

    minimum: 0

  • downloadable: optional boolean

    Whether the file can be downloaded.

    default: false

  • 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.

    format: date-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.

Example

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

Response (200)

{
  "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"
}

Download File

GET /v1/files/\{file_id\}/content

Download File

Path parameters

• file_id: string

  ID of the File.

Headers

• "anthropic-workspace-id": optional string

Example

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

Get File Metadata

GET /v1/files/\{file_id\}

Get File Metadata

Path parameters

• file_id: string

  ID of the File.

Headers

• "anthropic-workspace-id": optional string

Returns

• FileMetadata object

  • type: "file"

    Object type.

    For files, this is always "file".

  • 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.

    format: date-time

  • filename: string

    Original filename of the uploaded file.

    maxLength: 500, minLength: 1

  • mime_type: string

    MIME type of the file.

    maxLength: 255, minLength: 1

  • size_bytes: number

    Size of the file in bytes.

    minimum: 0

  • downloadable: optional boolean

    Whether the file can be downloaded.

    default: false

  • 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.

    format: date-time

Example

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

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"
}

Delete File

DELETE /v1/files/\{file_id\}

Delete File

Path parameters

• file_id: string

  ID of the File.

Headers

• "anthropic-workspace-id": optional string

Returns

• DeletedFile object

  • type: optional "file_deleted"

    Deleted object type.

    For file deletion, this is always "file_deleted".

    default: file_deleted

  • id: string

    ID of the deleted file.

Example

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

Response (200)

{
  "id": "file_011CNha8iCJcU1wXNR6q4V8w",
  "type": "file_deleted"
}

Domain types

Deleted File

• DeletedFile object

  • type: optional "file_deleted"

    Deleted object type.

    For file deletion, this is always "file_deleted".

    default: file_deleted

  • id: string

    ID of the deleted file.

File Metadata

• FileMetadata object

  • type: "file"

    Object type.

    For files, this is always "file".

  • 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.

    format: date-time

  • filename: string

    Original filename of the uploaded file.

    maxLength: 500, minLength: 1

  • mime_type: string

    MIME type of the file.

    maxLength: 255, minLength: 1

  • size_bytes: number

    Size of the file in bytes.

    minimum: 0

  • downloadable: optional boolean

    Whether the file can be downloaded.

    default: false

  • 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.

    format: date-time