diff --git a/balance.py b/balance.py
new file mode 100755
index 0000000..00af493
--- /dev/null
+++ b/balance.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+import sys, argparse, os
+from os.path import join, dirname
+from shutil import copyfile
+from dotenv import load_dotenv
+from libs.balancelib import Balance
+
+# Get variables environment
+if not os.path.isfile('.env'):
+    copyfile(".env.template", ".env")
+dotenv_path = join(dirname(__file__), '.env')
+load_dotenv(dotenv_path)
+
+dunikey = os.getenv('DUNIKEY')
+node = os.getenv('NODE')
+if not node:
+    sys.stderr.write("Please fill a Duniter node in .env file\n")
+    sys.exit(1)
+
+# Parse arguments
+parser = argparse.ArgumentParser()
+parser.add_argument('-p', '--pubkey', help="Clé publique du compte visé")
+parser.add_argument('--mempool', action='store_true', help="Utilise les sources en Mempool")
+args = parser.parse_args()
+
+# Create transaction and send it
+balance = Balance(dunikey, node, args.pubkey, args.mempool)
+result = balance.balance()
diff --git a/libs/balancelib.py b/libs/balancelib.py
new file mode 100644
index 0000000..5299b3a
--- /dev/null
+++ b/libs/balancelib.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+
+import sys, re, os.path, json, ast
+from termcolor import colored
+from natools import fmt, sign, get_privkey
+from gql import gql, Client
+from gql.transport.aiohttp import AIOHTTPTransport
+
+PUBKEY_REGEX = "(?![OIl])[1-9A-Za-z]{42,45}"
+
+class Balance:
+
+    def __init__(self, dunikey, node, pubkey, useMempool=False):
+        self.dunikey = dunikey
+        self.pubkey = pubkey if pubkey else get_privkey(dunikey, "pubsec").pubkey
+        self.useMempool = useMempool
+        if not re.match(PUBKEY_REGEX, self.pubkey) or len(self.pubkey) > 45:
+            sys.stderr.write("La clé publique n'est pas au bon format.\n")
+            sys.exit(1)
+
+        # Define Duniter GVA node
+        transport = AIOHTTPTransport(url=node)
+        self.client = Client(transport=transport, fetch_schema_from_transport=True)
+
+    def sendDoc(self):
+        # Build TX generation document
+        queryBuild = gql(
+            """
+            query ($pubkey: String!){
+                transactionsHistory(pubkey: $pubkey) {
+                    received {
+                        outputs
+                    }
+                    sent {
+                        outputs
+                    }
+                }
+            }
+        """
+        )
+        paramsBuild = {
+            "pubkey": self.pubkey
+        }
+
+        # Send TX document
+        try:
+            self.historyDoc = self.client.execute(queryBuild, variable_values=paramsBuild)
+        except Exception as e:
+            message = ast.literal_eval(str(e))["message"]
+            sys.stderr.write("Echec de récupération de l'historique:\n" + message + "\n")
+            sys.exit(1)
+
+        res = self.historyDoc['transactionsHistory']['received']
+        amount=[]
+        for i in res:
+            for output in i['outputs']:
+                if re.search(self.pubkey, output):
+                    amount.append(int(output.split(':')[0]))
+        receivedTotal = sum(amount)
+
+        res = self.historyDoc['transactionsHistory']['sent']
+        amount=[]
+        for i in res:
+            for output in i['outputs']:
+                if not re.search(self.pubkey, output):
+                    amount.append(int(output.split(':')[0]))
+        sentTotal = sum(amount)
+
+
+        # TODO: Get all UD from pubkey
+
+
+        total = (receivedTotal-sentTotal)/100
+        print(total)
+
+    def balance(self):
+        self.sendDoc()
+