[Resolved] Syntactical error in REST JSON

Thanks for your reply.

I just tried the following publicly available web service. Even there XML request working fine but NOT the json one as below

XML Request

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:web="http://www.webserviceX.NET/">
   <soap:Header/>
   <soap:Body>
      <web:ConversionRate>
         <web:FromCurrency>USD</web:FromCurrency>
         <web:ToCurrency>AUD</web:ToCurrency>
      </web:ConversionRate>
   </soap:Body>
</soap:Envelope>

Response

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <soap:Body>
      <ConversionRateResponse xmlns="http://www.webserviceX.NET/">
         <ConversionRateResult>1.0987</ConversionRateResult>
      </ConversionRateResponse>
   </soap:Body>
</soap:Envelope>

Json Request

{
  "soap:Envelope": {
    "-xmlns:soap": "http://www.w3.org/2003/05/soap-envelope",
    "-xmlns:web": "http://www.webserviceX.NET/",
    "soap:Body": {
      "web:ConversionRate": {
        "web:FromCurrency": "USD",
        "web:ToCurrency": "AUD"
      }
    }
  }
}

Jason Raw Request

POST http://www.webservicex.com/CurrencyConvertor.asmx HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/soap+xml;charset=UTF-8;action="http://www.webserviceX.NET/ConversionRate"
Content-Length: 269
Host: www.webservicex.com
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)

{
  "soap:Envelope": {
    "-xmlns:soap": "http://www.w3.org/2003/05/soap-envelope",
    "-xmlns:web": "http://www.webserviceX.NET/",
    "soap:Body": {
      "web:ConversionRate": {
        "web:FromCurrency": "USD",
        "web:ToCurrency": "AUD"
      }
    }
  }
}

Raw Response

HTTP/1.1 400 Bad Request
Cache-Control: private
Transfer-Encoding: chunked
Content-Type: text/html
Server: Microsoft-IIS/7.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Fri, 06 Dec 2013 23:55:54 GMT

Bad Request

After checking "http logs" couldn't find anything suspicious.

Can the service define as ONLY expect xml request?