update readme

diff --git a/README.md b/README.md
index 94e20c4..bad1ed3 100644 (file)
--- a/README.md
+++ b/README.md
@@ -52,6 +52,18 @@ Bytom Kit is a simple tool which can help developer to understand Bytom easily.
 - get_testnet_coins
 - get_gm_testnet_coins
 
+You post url: https://kit.blockmeta.com/api/v1/<api>.
+
+For example, create new entropy: https://kit.blockmeta.com/api/v1/create_entropy.
+
+return:
+
+```json
+{
+    "entropy": "2ebdb49c6cb7108e4d6e134100aa4bd1"
+}
+```
+
 ## 2 Usage
 
 ### 2.1 Key