KeyCheckValue schema from Amazon Payment Cryptography
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-payment-cryptography/refs/heads/main/json-schema/openapi-key-check-value-schema.json", "title": "KeyCheckValue", "description": "KeyCheckValue schema from Amazon Payment Cryptography", "type": "string", "pattern": "^[0-9a-fA-F]+$" }