diff --git a/_data/chains/eip155-266256.json b/_data/chains/eip155-266256.json
new file mode 100644
index 00000000..700e259a
--- /dev/null
+++ b/_data/chains/eip155-266256.json
@@ -0,0 +1,17 @@
+{
+  "name": "Gear Zero Network Testnet",
+  "chain": "GearZero",
+  "rpc": ["https://gzn-test.linksme.info"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Gear Zero Network Native Token",
+    "symbol": "GZN",
+    "decimals": 18
+  },
+  "infoURL": "https://token.gearzero.ca/testnet",
+  "shortName": "gz-testnet",
+  "chainId": 266256,
+  "networkId": 266256,
+  "slip44": 266256,
+  "explorers": []
+}
diff --git a/_data/chains/eip155-516.json b/_data/chains/eip155-516.json
new file mode 100644
index 00000000..2ceabac6
--- /dev/null
+++ b/_data/chains/eip155-516.json
@@ -0,0 +1,17 @@
+{
+  "name": "Gear Zero Network Mainnet",
+  "chain": "GearZero",
+  "rpc": ["https://gzn.linksme.info"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Gear Zero Network Native Token",
+    "symbol": "GZN",
+    "decimals": 18
+  },
+  "infoURL": "https://token.gearzero.ca/mainnet",
+  "shortName": "gz-mainnet",
+  "chainId": 516,
+  "networkId": 516,
+  "slip44": 516,
+  "explorers": []
+}