diff --git a/_data/chains/eip155-339.json b/_data/chains/eip155-339.json
new file mode 100644
index 000000000000..1d0e40d72354
--- /dev/null
+++ b/_data/chains/eip155-339.json
@@ -0,0 +1,16 @@
+{
+  "name": "Pencils Protocol",
+  "chain": "ETH",
+  "rpc": [],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Pencils Protocol Token",
+    "symbol": "DAPP",
+    "decimals": 18
+  },
+  "infoURL": "https://pencilsprotocol.io/",
+  "shortName": "dapp",
+  "chainId": 339,
+  "networkId": 339,
+  "status": "incubating"
+}
diff --git a/_data/chains/eip155-33999.json b/_data/chains/eip155-33999.json
new file mode 100644
index 000000000000..1d350299d92e
--- /dev/null
+++ b/_data/chains/eip155-33999.json
@@ -0,0 +1,16 @@
+{
+  "name": "Pencils Protocol Sepolia Testnet",
+  "chain": "ETH",
+  "rpc": [],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Pencils Protocol Sepolia Testnet Token",
+    "symbol": "DAPPST",
+    "decimals": 18
+  },
+  "infoURL": "https://pencilsprotocol.io/",
+  "shortName": "dapp-sepolia",
+  "chainId": 33999,
+  "networkId": 33999,
+  "status": "incubating"
+}