Hello @srinivasa.p

You can send the request message for the currency RIC with the following JSON message:

{
    "ID":2,
    "Key":{
        "Name":"THB="
    }
}

Or

{
    "ID":2,
    "Key":{
        "Name":"THB=",
        "Service": "<Your Service Name>"
    }
}

Please find more detail about how to request data with the WebSocket API from the following resources:

• Request Data from Server
• Make a Batch Request for Multiple Items
• Filtering the Field List – specifying a View

The currency RICs are mostly in the "<Currency>=" format like the following:

• THB= --> US Dollar/Thai Bath FX Spot rate
• JPY= --> US Dollar/Japanese Yen FX Spot rate
• etc

You can find the currency RIC that you want from the RIC-Search tool page as follows.

About the "for every 30min", you may modify your application source code to sends a request message as a "snapshot" request every 30 minutes.

{
  "ID":2,
  "Key":{
    "Name":"THB=",
    "Service":"ELEKTRON_DD"
  },
  "Streaming":false
}

You can find the WebSocket API examples from the https://github.com/Refinitiv/websocket-api GitHub repository.