POST /rpc

POST

https://casper.nownodes.io/rpc

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Retrieves detailed balance information for a given purse under an account. Includes total balance, available balance, holds (if any), and cryptographic proof.

Body

application/json

idintegerrequired

Unique identifier for the JSON-RPC request

jsonrpcstringrequired

JSON-RPC version (should be "2.0")

methodstringrequired

The method to call

paramsobjectrequired

Parameters for the method

Show child attributes

state_identifierobject | objectrequired

Block or state root hash to query against

purse_identifierobjectrequired

Purse identifier under an account

Show child attributes

main_purse_under_account_hashstringrequired

The account hash of the main purse

Response

200OK

Successful response with balance details

POST /rpc

curl -X POST 'https://casper.nownodes.io/rpc' \
  -H 'Content-Type: application/json' \
  -d '{
    "id": 0,
    "jsonrpc": "2.0",
    "method": "query_balance_details",
    "params": {
      "state_identifier": {
        "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
      },
      "purse_identifier": {
        "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
      }
    }
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://casper.nownodes.io/rpc");
const result = await provider.send("query_balance_details", {
  "state_identifier": {
    "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
  },
  "purse_identifier": {
    "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
  }
});
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://casper.nownodes.io/rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "query_balance_details",
  "params": {
    "state_identifier": {
      "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
    },
    "purse_identifier": {
      "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
    }
  },
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://casper.nownodes.io/rpc"))
response = w3.provider.make_request("query_balance_details", {
  "state_identifier": {
    "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
  },
  "purse_identifier": {
    "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
  }
})
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://casper.nownodes.io/rpc"),
});

const result = await client.request({
  method: "query_balance_details",
  params: {
  "state_identifier": {
    "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
  },
  "purse_identifier": {
    "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
  }
},
});

console.log(result);

const endpoint = "https://casper.nownodes.io/rpc";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "query_balance_details", params: {
  "state_identifier": {
    "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
  },
  "purse_identifier": {
    "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
  }
}, id: 1 });
console.log(result);

const response = await fetch('https://casper.nownodes.io/rpc', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "id": 0,
      "jsonrpc": "2.0",
      "method": "query_balance_details",
      "params": {
        "state_identifier": {
          "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
        },
        "purse_identifier": {
          "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
        }
      }
    }),
});

const data = await response.json();

import requests

payload = {
  "id": 0,
  "jsonrpc": "2.0",
  "method": "query_balance_details",
  "params": {
    "state_identifier": {
      "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
    },
    "purse_identifier": {
      "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
    }
  }
}

response = requests.post('https://casper.nownodes.io/rpc', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://casper.nownodes.io/rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "id": 0,
    "jsonrpc": "2.0",
    "method": "query_balance_details",
    "params": {
      "state_identifier": {
        "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
      },
      "purse_identifier": {
        "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
      }
    }
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "id": 0,
  "jsonrpc": "2.0",
  "method": "query_balance_details",
  "params": {
    "state_identifier": {
      "BlockHash": "13c2d7a68ecdd4b74bf4393c88915c836c863fc4bf11d7f2bd930a1bbccacdcb"
    },
    "purse_identifier": {
      "main_purse_under_account_hash": "account-hash-0909090909090909090909090909090909090909090909090909090909090909"
    }
  }
}

200

{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "api_version": "2.0.0",
    "total_balance": "123450000000",
    "available_balance": "123450000000",
    "holds": [
      {
        "id": "hold-1",
        "amount": "100000000",
        "timestamp": "2025-12-10T00:00:00Z"
      }
    ],
    "total_balance_proof": "abcdef0123456789..."
  }
}

Documentation

How to migrate to NOWNodes

Authorizations

Body

Response