diff --git a/_data/chains/eip155-534352.json b/_data/chains/eip155-534352.json
new file mode 100644
index 00000000..63d2ea73
--- /dev/null
+++ b/_data/chains/eip155-534352.json
@@ -0,0 +1,21 @@
+{
+  "name": "Scroll",
+  "chain": "ETH",
+  "rpc": [],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "infoURL": "https://scroll.io",
+  "shortName": "scroll",
+  "chainId": 534352,
+  "networkId": 534352,
+  "explorers": [],
+  "parent": {
+    "type": "L2",
+    "chain": "eip155-1",
+    "bridges": []
+  },
+}
diff --git a/_data/chains/eip155-534353.json b/_data/chains/eip155-534353.json
new file mode 100644
index 00000000..934ec841
--- /dev/null
+++ b/_data/chains/eip155-534353.json
@@ -0,0 +1,26 @@
+{
+  "name": "Scroll Pre-Alpha Testnet",
+  "chain": "ETH",
+  "rpc": [
+    "https://prealpha.scroll.io/l2"
+  ],
+  "faucets": [
+    "https://prealpha.scroll.io"
+  ],
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "infoURL": "https://scroll.io",
+  "shortName": "scroll-testnet",
+  "chainId": 534353,
+  "networkId": 534353,
+  "explorers": [
+    {
+      "name": "Scroll L2 Block Explorer",
+      "url": "https://l2scan.scroll.io",
+      "standard": "EIP3091"
+    }
+  ]
+}