diff --git a/coins/giarcoin.json b/coins/giarcoin.json
new file mode 100644
index 0000000..e0f592d
--- /dev/null
+++ b/coins/giarcoin.json
@@ -0,0 +1,5 @@
+{
+    "name": "Giarcoin",
+    "symbol": "GIAR",
+    "algorithm": "scrypt-n"
+}
diff --git a/coins/globaldenomination.json b/coins/globaldenomination.json
new file mode 100644
index 0000000..d43c28b
--- /dev/null
+++ b/coins/globaldenomination.json
@@ -0,0 +1,5 @@
+{
+    "name": "GlobalDenomination",
+    "symbol": "GDN",
+    "algorithm": "x11"
+}
diff --git a/coins/guarantcoin.json b/coins/guarantcoin.json
new file mode 100644
index 0000000..9c3c114
--- /dev/null
+++ b/coins/guarantcoin.json
@@ -0,0 +1,5 @@
+{
+    "name": "Guarantcoin",
+    "symbol": "GTC",
+    "algorithm": "scrypt-n"
+}