要使用Acumatica的API来创建快速支票，您需要使用以下端点和代码示例：

1. 创建支票头：

   • 端点：/entity/Default/17.200.001/CashTransactions
   • 请求方法：POST
   • 代码示例：

     var client = new RestClient("https://your-acumatica-instance/entity/Default/17.200.001/CashTransactions");
     client.Timeout = -1;
     var request = new RestRequest(Method.POST);
     request.AddHeader("Authorization", "Bearer your_access_token");
     request.AddHeader("Content-Type", "application/json");
     request.AddParameter("application/json", "{\n    \"Type\": {\n        \"value\": \"Check\"\n    },\n    \"ReferenceNbr\": {\n        \"value\": \"CHECK001\"\n    },\n    \"Status\": {\n        \"value\": \"Hold\"\n    }\n}",  ParameterType.RequestBody);
     IRestResponse response = client.Execute(request);
     Console.WriteLine(response.Content);
     

2. 创建支票明细：

   • 端点：/entity/Default/17.200.001/CashTransactions/{referenceNumber}/Transactions
   • 请求方法：POST
   • 代码示例：

     var client = new RestClient("https://your-acumatica-instance/entity/Default/17.200.001/CashTransactions/{referenceNumber}/Transactions");
     client.Timeout = -1;
     var request = new RestRequest(Method.POST);
     request.AddHeader("Authorization", "Bearer your_access_token");
     request.AddHeader("Content-Type", "application/json");
     request.AddParameter("application/json", "{\n    \"Type\": {\n        \"value\": \"Check\"\n    },\n    \"ReferenceNbr\": {\n        \"value\": \"CHECK001\"\n    },\n    \"AccountID\": {\n        \"value\": \"12345\"\n    },\n    \"Amount\": {\n        \"value\": 100.00\n    },\n    \"Status\": {\n        \"value\": \"Hold\"\n    }\n}",  ParameterType.RequestBody);
     IRestResponse response = client.Execute(request);
     Console.WriteLine(response.Content);
     

请确保将上述代码示例中的your-acumatica-instance替换为您的Acumatica实例的URL，并将your_access_token替换为您的访问令牌。此外，还需要根据您的业务需求自定义请求正文的参数。

注意：上述代码示例使用的是C#和RestSharp库来执行HTTP请求。您可以使用任何适用于您的编程语言和HTTP客户端库来调用Acumatica的API。