diff --git a/mainnet/DUST/data.json b/mainnet/DUST/data.json
index a0e44cd..efbf277 100644
--- a/mainnet/DUST/data.json
+++ b/mainnet/DUST/data.json
@@ -3,5 +3,8 @@
   "address": "0xAD96C3dffCD6374294e2573A7fBBA96097CC8d7c",
   "name": "Pixie Dust",
   "symbol": "DUST",
-  "decimals": 18
+  "decimals": 18,
+  "extensions": {
+    "coinGeckoId": "pixie-dust"
+  }
 }
diff --git a/mainnet/earnAUSD/data.json b/mainnet/earnAUSD/data.json
index eb4848f..409390f 100644
--- a/mainnet/earnAUSD/data.json
+++ b/mainnet/earnAUSD/data.json
@@ -3,5 +3,8 @@
   "address": "0x103222f020e98Bba0AD9809A011FDF8e6F067496",
   "name": "earnAUSD",
   "symbol": "earnAUSD",
-  "decimals": 6
+  "decimals": 6,
+  "extensions": {
+    "coinGeckoId": "earnausd"
+  }
 }
diff --git a/mainnet/suETH/data.json b/mainnet/suETH/data.json
index ffc966c..e3d5ddb 100644
--- a/mainnet/suETH/data.json
+++ b/mainnet/suETH/data.json
@@ -3,5 +3,8 @@
   "address": "0x1c22531AA9747d76fFF8F0A43b37954ca67d28e0",
   "name": "Sumerian ETH",
   "symbol": "suETH",
-  "decimals": 18
+  "decimals": 18,
+  "extensions": {
+    "coinGeckoId": "sumer-money-sueth"
+  }
 }
diff --git a/mainnet/suUSD/data.json b/mainnet/suUSD/data.json
index 257846f..db2725a 100644
--- a/mainnet/suUSD/data.json
+++ b/mainnet/suUSD/data.json
@@ -3,5 +3,8 @@
   "address": "0x8BF591Eae535f93a242D5A954d3Cde648b48A5A8",
   "name": "Sumerian USD",
   "symbol": "suUSD",
-  "decimals": 18
+  "decimals": 18,
+  "extensions": {
+    "coinGeckoId": "sumer-money-suusd"
+  }
 }