{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://raw.githubusercontent.com/api-evangelist/billdesk/main/json-schema/billdesk-upi-schema.json", "title": "Upi", "description": "Required when payment_method_type = upi and txn_process_type = collect", "x-generated": "2026-10-14", "x-method": "derived", "x-generator": "derive-json-schema.py", "x-source": "openapi/billdesk-validate-vpa-openapi.yml#/components/schemas/Upi", "type": "object", "x-stoplight": { "id": "5964437f54f97" }, "properties": { "vpa": { "type": "string", "description": "Virtual Payment Address", "pattern": "^[a-zA-Z0-9][a-zA-Z0-9\\\\.\\\\-\\\\_]{2,38}\\\\@[a-zA-Z0-9]{3,20}$" } } }