resolved : sharepoint 2013 workflow with rest api.

Sharepoint 2016 workflow with rest api.
or
APP step sharepoint workflow.

Solution:

  1. Go to Site Settings.
  2. In the Site Actions section, select Manage site features.
  3. Locate the feature called Workflows can use app permissions, as shown in the figure, and then click Activate.
  1. Go to Site Settings.
  2. In the Users and Permissions section, select Site app permissions.
  3. Copy the client section of the App Identifier. This is the identifier between the last "|" and the "@" sign, as shown in the figure.
  4. Navigate to the Grant permission to an app page. This must be done by browsing to the appinv.aspx page of the site.
    Example: http://{hostname}/{the Site Collection}/_layouts/15/appinv.aspx.
  1. Paste the client id in the App Id field and then click Lookup, as shown in the figure.
  2. Paste the following Permissions Request XML to grant full control permission.
    <AppPermissionRequests>
    <AppPermissionRequest Scope="http://sharepoint/content/sitecollection/web" Right="FullControl" />
</AppPermissionRequests>
    Caution noteCaution
    There are no placeholders in the Scope value above. It is a literal value. Enter it exactly as it appears here.
    1. Click Create.
    2. You will then be asked to trust the Workflow app, as shown in the figure. Click Trust It.

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