diff --git a/_data/chains/eip155-23294.json b/_data/chains/eip155-23294.json
new file mode 100644
index 00000000..7dbd635e
--- /dev/null
+++ b/_data/chains/eip155-23294.json
@@ -0,0 +1,17 @@
+{
+  "name": "Oasis Sapphire",
+  "chain": "Sapphire",
+  "icon": "oasis",
+  "rpc": ["https://sapphire.oasis.dev", "wss://sapphire.oasis.dev/ws"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Sapphire Rose",
+    "symbol": "ROSE",
+    "decimals": 18
+  },
+  "infoURL": "https://docs.oasis.io/dapp/sapphire",
+  "shortName": "sapphire",
+  "chainId": 23294,
+  "networkId": 23294,
+  "status": "incubating"
+}
diff --git a/_data/chains/eip155-23295.json b/_data/chains/eip155-23295.json
new file mode 100644
index 00000000..b0561379
--- /dev/null
+++ b/_data/chains/eip155-23295.json
@@ -0,0 +1,26 @@
+{
+  "name": "Oasis Sapphire Testnet",
+  "chain": "Sapphire",
+  "icon": "oasis",
+  "rpc": [
+    "https://testnet.sapphire.oasis.dev",
+    "wss://testnet.sapphire.oasis.dev/ws"
+  ],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "Sapphire Test Rose",
+    "symbol": "TEST",
+    "decimals": 18
+  },
+  "infoURL": "https://docs.oasis.io/dapp/sapphire",
+  "shortName": "sapphire-testnet",
+  "chainId": 23295,
+  "networkId": 23295,
+  "explorers": [
+    {
+      "name": "Oasis Sapphire Testnet Explorer",
+      "url": "https://testnet.explorer.sapphire.oasis.dev",
+      "standard": "EIP3091"
+    }
+  ]
+}