diff --git a/_data/chains/eip155-40.json b/_data/chains/eip155-40.json
new file mode 100644
index 00000000..d58e4bb4
--- /dev/null
+++ b/_data/chains/eip155-40.json
@@ -0,0 +1,19 @@
+{
+  "name": "Telos EVM Mainnet",
+  "chain": "TLOS",
+  "network": "mainnet",
+  "rpc": [
+    "https://mainnet.telos.net/evm"
+  ],
+  "faucets": [
+  ],
+  "nativeCurrency": {
+    "name": "Telos",
+    "symbol": "TLOS",
+    "decimals": 18
+  },
+  "infoURL": "https://telos.net",
+  "shortName": "Telos EVM",
+  "chainId": 40,
+  "networkId": 40
+}
diff --git a/_data/chains/eip155-41.json b/_data/chains/eip155-41.json
new file mode 100644
index 00000000..2649cc06
--- /dev/null
+++ b/_data/chains/eip155-41.json
@@ -0,0 +1,20 @@
+{
+  "name": "Telos EVM Testnet",
+  "chain": "TLOS",
+  "network": "testnet",
+  "rpc": [
+    "https://testnet.telos.net/evm"
+  ],
+  "faucets": [
+    "https://app.telos.net/testnet/developers"
+  ],
+  "nativeCurrency": {
+    "name": "Telos",
+    "symbol": "TLOS",
+    "decimals": 18
+  },
+  "infoURL": "https://telos.net",
+  "shortName": "Telos EVM Testnet",
+  "chainId": 41,
+  "networkId": 41
+}