# Start or restart transfer session

This function starts or restarts a transfer session.



  For more information about how this function works with other functions in the transfer and restore process, read our Guide to Transfer and Restore API Functions documentation.

Endpoint: GET /start_transfer_session
Version: 11.134.0.5
Security: BasicAuth

## Query parameters:

  - `transfer_session_id` (string, required)
    The transfer session's ID.
    Example: "exampleservercopya20140206192428NtyW"

## Response 200 fields (application/json):

  - `data` (object)

  - `data.pid` (integer)
    The transfer session's process ID.
    Example: 90210

  - `metadata` (object)

  - `metadata.command` (string)
    The method name called.
    Example: "start_transfer_session"

  - `metadata.reason` (string)
    The reason the API function failed when the  field is 0. This field may display a success message when a function succeeds.
    Example: "OK"

  - `metadata.result` (integer)
    *  - Success
*  - Failed: Check the reason field for more details.
    Enum: 0, 1

  - `metadata.version` (integer)
    The version of the API function.
    Example: 1