diff --git a/chains/chains.json b/chains/chains.json
new file mode 100644
index 00000000..806e6be5
--- /dev/null
+++ b/chains/chains.json
@@ -0,0 +1,10 @@
+[
+    {
+        "addr": "0021",
+        "url": "geth-mainnet:8545"
+    },
+    {
+        "addr": "0022",
+        "url": "geth-rinkeby:8545"
+    }
+]
\ No newline at end of file