diff --git a/backend/config.json.default b/backend/config.json.default
index 5542b5f..10a70a9 100644
--- a/backend/config.json.default
+++ b/backend/config.json.default
@@ -33,9 +33,9 @@
     },
     {
         "chainId": 31,
-        "bundler": "https://rootstocktestnet-bundler.etherspot.io",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/31",
         "contracts": {
-            "etherspotPaymasterAddress": "0x898c530A5fA37720DcF1843AeCC34b6B0cBaEB8a"
+            "etherspotPaymasterAddress": "0xD302BE6e9D3fE0fBf8122a0C34611E31c0D0E792"
         },
         "thresholdValue": "0.00079"
     },
@@ -49,7 +49,7 @@
     },
         {
         "chainId": 97,
-        "bundler": "https://bnbtestnet-bundler.etherspot.io/",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/97",
         "contracts": {
             "etherspotPaymasterAddress": "0x153e26707DF3787183945B88121E4Eb188FDCAAA"
         },
@@ -65,7 +65,7 @@
     },
         {
         "chainId": 114,
-        "bundler": "https://flaretestnet-bundler.etherspot.io/",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/114",
         "contracts": {
             "etherspotPaymasterAddress": "0x2a18C360b525824B3e5656B5a705554f2a5036Be"
         },
@@ -81,7 +81,7 @@
     },
     {
         "chainId": 123,
-        "bundler": "https://fusetestnet-bundler-bundler.etherspot.io",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/123",
         "contracts": {
             "etherspotPaymasterAddress": "0xAF628C207513c5E51d894b3733056B8080634923"
         },
@@ -95,14 +95,6 @@
         },
         "thresholdValue": "69.85"
     },
-    {
-        "chainId": 1001,
-        "bundler": "https://klaytntestnet-bundler.etherspot.io/",
-        "contracts": {
-            "etherspotPaymasterAddress": "0x810FA4C915015b703db0878CF2B9344bEB254a40"
-        },
-        "thresholdValue": "275.2"
-    },
     {
         "chainId": 5000,
         "bundler": "https://mantle-bundler.etherspot.io/",
@@ -112,10 +104,10 @@
         "thresholdValue": "44.24"
     },
     {
-        "chainId": 5001,
-        "bundler": "https://mantletestnet-bundler.etherspot.io/",
+        "chainId": 5003,
+        "bundler": "https://testnet-rpc.etherspot.io/v1/5003",
         "contracts": {
-            "etherspotPaymasterAddress": "0xb56eC212C60C47fb7385f13b7247886FFa5E9D5C"
+            "etherspotPaymasterAddress": "0x8350355c08aDAC387b443782124A30A8942BeC2e"
         },
         "thresholdValue": "44.24"
     },
@@ -161,7 +153,7 @@
     },
     {
         "chainId": 84532,
-        "bundler": "https://basesepolia-bundler.etherspot.io",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/84532",
         "contracts": {
             "etherspotPaymasterAddress": "0xe893A26DD53b325BffAacDfA224692EfF4C448c4"
         },
@@ -169,7 +161,7 @@
     },
     {
         "chainId": 421614,
-        "bundler": "https://arbitrumsepolia-bundler.etherspot.io",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/421614",
         "contracts": {
             "etherspotPaymasterAddress": "0xe893A26DD53b325BffAacDfA224692EfF4C448c4"
         },
@@ -177,7 +169,7 @@
     },
     {
         "chainId": 534351,
-        "bundler": "https://scrollsepolia-bundler.etherspot.io/",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/534351",
         "contracts": {
             "etherspotPaymasterAddress": "0xe893A26DD53b325BffAacDfA224692EfF4C448c4"
         },
@@ -193,7 +185,7 @@
     },
     {
         "chainId": 11155111,
-        "bundler": "https://sepolia-bundler.etherspot.io",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/11155111",
         "contracts": {
             "etherspotPaymasterAddress": "0xcaDBADcFeD5530A49762DFc9d1d712CcD6b09b25"
         },
@@ -201,7 +193,7 @@
     },
     {
         "chainId": 28122024,
-        "bundler": "https://ancient8testnet-bundler.etherspot.io/",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/28122024",
         "contracts": {
             "etherspotPaymasterAddress": "0xe893A26DD53b325BffAacDfA224692EfF4C448c4"
         },
@@ -209,7 +201,7 @@
     },
     {
         "chainId": 11155420,
-        "bundler": "https://optimismsepolia-bundler.etherspot.io",
+        "bundler": "https://testnet-rpc.etherspot.io/v1/11155420",
         "contracts": {
             "etherspotPaymasterAddress": "0xB3AD9B9B06c6016f81404ee8FcCD0526F018Cf0C"
         },
@@ -222,5 +214,13 @@
             "etherspotPaymasterAddress": "0x810FA4C915015b703db0878CF2B9344bEB254a40"
         },
         "thresholdValue": "0.016"
+    },
+    {
+        "chainId": 80002,
+        "bundler": "https://testnet-rpc.etherspot.io/v1/80002",
+        "contracts": {
+            "etherspotPaymasterAddress": "0xe893a26dd53b325bffaacdfa224692eff4c448c4"
+        },
+        "thresholdValue": "0.01"
     }
 ]