# Run an AI 2D Virtual Try On Ring task.

AI tasks are asynchronous. Prefer webhook-based completion handling when the feature supports webhooks. Configure your webhook endpoint, verify webhook signatures, and use the received `task_id` to query the task result after a `success` or `error` notification. See the [webhook integration guide](/develop/webhook.md) for setup and verification details.
If webhooks are not supported for the feature, or if your integration cannot use webhooks, implement polling. After starting an AI task, keep polling the task status endpoint at the given `polling_interval` until the task status is either `success` or `error`.
Do not stop polling a running task for longer than the allowed polling window. If the task is not polled in time, the task may expire; a later status check can return `InvalidTaskId` even if processing finished, and the consumed units may still be charged.

Endpoint: POST /s2s/v2.0/task/2d-vto/ring
Security: BearerAuthenticationV2

## Request fields (application/json):

  - `object_infos` (array)

  - `object_infos.parameter` (object)

  - `object_infos.parameter.ring_need_remove_background` (boolean)
    Whether the ring image needs background removal.
    Example: true

  - `object_infos.parameter.ring_anchor_point` (array)
    The anchor point of the ring image, marking the 2 farthest points along the inner edge of the ring Type: 2x2 list of integers Range: 2 (x, y) pixel coordinates Default: null (use engine default)
    Example: null

  - `object_infos.parameter.ring_wearing_finger` (integer)
    Defines on which finger the ring is worn. Default: null (use engine default) Range: 0 ~ 4 [thumb to pinky]
    Enum: 0, 1, 2, 3, 4

  - `object_infos.parameter.ring_wearing_location` (number)
    Defines the placement of the ring on the selected finger in the user photo. Range: 0.0 ~ 1.0(0 = base of the finger, 1 = first knuckle)
    Example: null

  - `object_infos.parameter.ring_shadow_intensity` (number)
    Shadow intensity applied to the ring (higher = darker shadow).
    Example: 0.15

  - `object_infos.parameter.ring_ambient_light_intensity` (number)
    Ambient light adjustment intensity for the ring.
    Example: 1

## Response 200 fields (application/json):

  - `status` (integer)
    Response status
    Example: 200

  - `data` (object)

  - `data.task_id` (string)
    ID of this task. Task result is valid to query by this ID for 24 hours.
    Example: grH0CvsgXuAIHLUzD0V1Ol34hoet3R1tvdbtiVHrDb6_UqCLKIejAIajwxrhOAfe

## Response 400 fields (application/json):

  - `status` (integer)
    Response status
    Example: 400

  - `error` (string)
    Error message
    Example: The operation could not be completed

  - `error_code` (string)
    Error code:
* InvalidParameters - Invalid request parameters
* CreditInsufficiency - Insufficient unit to run
* BadRequest - Unexpected request parameter
* InvalidStyleGroup - Invalid style group id
* InvalidStyle - Invalid style id
    Enum: "InvalidParameters", "CreditInsufficiency", "InvalidStyleGroup", "InvalidStyle", "BadRequest"

## Response 401 fields (application/json):

  - `status` (integer)
    Response status
    Example: 401

  - `error` (string)
    Example: Invalid API key

## Response 429 fields (application/json):

  - `status` (integer)
    Response status
    Example: 429

  - `error` (string)
    Example: Too many requests