Request for a form description with pre-filled field values
The request is for re-displaying the payment form to the user with the field values already filled in, to make it easier to repeat previously completed operations.
To request a form description with pre-filled fields, use the POST method at the same address as for requesting the payment form description:
Address of the method<pattern_id>
Сontent-Type: application/x-www-form-urlencoded, UTF‑8 encoded.
The request must contain a list of form field values, in the name-value format.
The code of the language that the client wants to get the form description in, conforming to RFC-5646: Tags for Identifying Languages, IANA Language Subtag Registry.
Possible values:
  • ru — Russian;
  • en — English.
By default: ru
Indicates client support for traffic compression. Supported values: gzip — Support for GZIP transfer encoding (RFC-1952: GZIP file format specification).
By default: file compression is not used.
Request example
POST /api/showcase/5506 HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Content-Length: 28
Accept-Language: ru
Accept-Encoding: gzip

The method response is similar to the response to the request for the payment form description.
The form fields are pre-filled with values from the request parameters.