diff --git a/cashu/wallet/utils.py b/cashu/wallet/utils.py
new file mode 100644
index 00000000..b5b1115b
--- /dev/null
+++ b/cashu/wallet/utils.py
@@ -0,0 +1,10 @@
+def sanitize_url(url: str) -> str:
+    # extract host from url and lower case it, remove trailing slash from url
+    protocol = url.split("://")[0]
+    host = url.split("://")[1].split("/")[0].lower()
+    path = (
+        url.split("://")[1].split("/", 1)[1].rstrip("/")
+        if "/" in url.split("://")[1]
+        else ""
+    )
+    return f"{protocol}://{host}{'/' + path if path else ''}"
diff --git a/cashu/wallet/wallet.py b/cashu/wallet/wallet.py
index 4cc7ae0d..8a255d5c 100644
--- a/cashu/wallet/wallet.py
+++ b/cashu/wallet/wallet.py
@@ -8,9 +8,6 @@
 from bip32 import BIP32
 from loguru import logger
 
-from cashu.core.crypto.keys import derive_keyset_id
-from cashu.core.json_rpc.base import JSONRPCSubscriptionKinds
-
 from ..core.base import (
     BlindedMessage,
     BlindedSignature,
@@ -22,10 +19,16 @@
     WalletKeyset,
 )
 from ..core.crypto import b_dhke
+from ..core.crypto.keys import derive_keyset_id
 from ..core.crypto.secp import PrivateKey, PublicKey
 from ..core.db import Database
 from ..core.errors import KeysetNotFoundError
-from ..core.helpers import amount_summary, calculate_number_of_blank_outputs, sum_proofs
+from ..core.helpers import (
+    amount_summary,
+    calculate_number_of_blank_outputs,
+    sum_proofs,
+)
+from ..core.json_rpc.base import JSONRPCSubscriptionKinds
 from ..core.migrations import migrate_databases
 from ..core.models import (
     PostCheckStateResponse,
@@ -34,7 +37,8 @@
 from ..core.p2pk import Secret
 from ..core.settings import settings
 from ..core.split import amount_split
-from ..wallet.crud import (
+from . import migrations
+from .crud import (
     bump_secret_derivation,
     get_keysets,
     get_proofs,
@@ -48,7 +52,6 @@
     update_lightning_invoice,
     update_proof,
 )
-from . import migrations
 from .htlc import WalletHTLC
 from .mint_info import MintInfo
 from .p2pk import WalletP2PK
@@ -56,6 +59,7 @@
 from .secrets import WalletSecrets
 from .subscriptions import SubscriptionManager
 from .transactions import WalletTransactions
+from .utils import sanitize_url
 from .v1_api import LedgerAPI
 
 
@@ -107,8 +111,8 @@ def __init__(self, url: str, db: str, name: str = "no_name", unit: str = "sat"):
         self.proofs: List[Proof] = []
         self.name = name
         self.unit = Unit[unit]
+        url = sanitize_url(url)
 
-        url = url.rstrip("/")
         super().__init__(url=url, db=self.db)
         logger.debug("Wallet initialized")
         logger.debug(f"Mint URL: {url}")
diff --git a/tests/test_wallet_utils.py b/tests/test_wallet_utils.py
new file mode 100644
index 00000000..534db8df
--- /dev/null
+++ b/tests/test_wallet_utils.py
@@ -0,0 +1,63 @@
+from typing import List, Union
+
+from cashu.core.errors import CashuError
+from cashu.wallet.utils import sanitize_url
+
+
+async def assert_err(f, msg: Union[str, CashuError]):
+    """Compute f() and expect an error message 'msg'."""
+    try:
+        await f
+    except Exception as exc:
+        error_message: str = str(exc.args[0])
+        if isinstance(msg, CashuError):
+            if msg.detail not in error_message:
+                raise Exception(
+                    f"CashuError. Expected error: {msg.detail}, got: {error_message}"
+                )
+            return
+        if msg not in error_message:
+            raise Exception(f"Expected error: {msg}, got: {error_message}")
+        return
+    raise Exception(f"Expected error: {msg}, got no error")
+
+
+async def assert_err_multiple(f, msgs: List[str]):
+    """Compute f() and expect an error message 'msg'."""
+    try:
+        await f
+    except Exception as exc:
+        for msg in msgs:
+            if msg in str(exc.args[0]):
+                return
+        raise Exception(f"Expected error: {msgs}, got: {exc.args[0]}")
+    raise Exception(f"Expected error: {msgs}, got no error")
+
+
+def test_sanitize_url():
+    url = "https://localhost:3338"
+    assert sanitize_url(url) == "https://localhost:3338"
+
+    url = "https://mint.com:3338"
+    assert sanitize_url(url) == "https://mint.com:3338"
+
+    url = "https://Mint.com:3338"
+    assert sanitize_url(url) == "https://mint.com:3338"
+
+    url = "https://mint.com:3338/"
+    assert sanitize_url(url) == "https://mint.com:3338"
+
+    url = "https://mint.com:3338/abc"
+    assert sanitize_url(url) == "https://mint.com:3338/abc"
+
+    url = "https://mint.com:3338/Abc"
+    assert sanitize_url(url) == "https://mint.com:3338/Abc"
+
+    url = "https://mint.com:3338/abc/"
+    assert sanitize_url(url) == "https://mint.com:3338/abc"
+
+    url = "https://mint.com:3338/Abc/"
+    assert sanitize_url(url) == "https://mint.com:3338/Abc"
+
+    url = "https://Mint.com:3338/Abc/def"
+    assert sanitize_url(url) == "https://mint.com:3338/Abc/def"