# Claim free offer chain step

Completes the current user’s progression through the offer chain step and grants the associated reward.

  Notice
    Use this call only for free steps in the offer chain.
    For steps that require payment in real currency, use the Create order for paid offer chain step call instead.

Endpoint: POST /v2/project/{project_id}/user/offer_chain/{offer_chain_id}/step/number/{step_number}/claim
Version: 2.0.0
Security: XsollaLoginUserJWT

## Path parameters:

  - `project_id` (integer, required)
    Project ID. You can find this parameter in your Publisher Account next to the name of the project.
    Example: 44056

  - `offer_chain_id` (integer, required)
    Offer chain ID.
    Example: 101

  - `step_number` (integer, required)
    Offer chain step number.
    Example: 1

## Response 200 fields (application/json):

  - `order_id` (integer)
    Order ID.

## Response 401 fields (application/json):

  - `statusCode` (integer)
    Example: 401

  - `errorCode` (integer)
    Example: 1501

  - `errorMessage` (string)
    Example: "[0401-1501]: Authorization failed: Provide authorization"

## Response 404 fields (application/json):

  - `statusCode` (integer)
    Example: 422

  - `errorCode` (integer)
    Example: 1102

  - `errorMessage` (string)
    Example: "[0401-1102]: Unprocessable Entity. The property `property_name` is required"

  - `transactionId` (string)
    Example: "x-x-x-x-transactionId-mock-x-x-x"

  - `errorMessageExtended` (object,null)

## Response 422 fields (application/json):

  - `statusCode` (integer)
    Example: 422

  - `errorCode` (integer)
    Example: 1102

  - `errorMessage` (string)
    Example: "[0401-1102]: Unprocessable Entity. The property `property_name` is required"

  - `transactionId` (string)
    Example: "x-x-x-x-transactionId-mock-x-x-x"

  - `errorMessageExtended` (object,null)