diff --git a/relay/scripts/ibc_scan.py b/relay/scripts/ibc_scan.py
index ba881b6d..2ceec090 100644
--- a/relay/scripts/ibc_scan.py
+++ b/relay/scripts/ibc_scan.py
@@ -1,42 +1,63 @@
+# This tool scan all info clients/connections/channels/ports between chainA and chainB
+
 import requests
 import time
+from optparse import OptionParser
+import sys
 
 
-def scan_clients():
-    print("scan_clients...")
-    # is_fetching = True
+def scan_clients(url_api, chain_id):
+    print("scan_clients... url_api={} chain_id={}".format(url_api, chain_id))
     pagination_key = ""
 
     while True:
         time.sleep(3)
         # print("pagination_key={}".format(pagination_key))
-        url = "https://api-composable-ia.cosmosia.notional.ventures/ibc/core/client/v1/client_states?pagination.limit=100&pagination.key={}".format(
-            pagination_key)
+        url = "{}/ibc/core/client/v1/client_states?pagination.limit=100&pagination.key={}".format(url_api, pagination_key)
+        print(url)
         rq = requests.get(url)
         rq_json = rq.json()
         pagination_key = rq_json["pagination"]["next_key"]
         client_states = rq_json["client_states"]
         if len(client_states) <= 0:
-            # is_fetching = False
             break
 
         for cs in client_states:
             try:
                 client_id = cs["client_id"]
-                x_id = ""
-
-                if client_id.startswith("08-wasm-"):
-                    x_id = cs["client_state"]["code_id"]
-                elif client_id.startswith("07-tendermint-"):
-                    x_id = cs["client_state"]["chain_id"]
-                else:
-                    x_id = ""
-
-                print("client_id={}, chain_id/code_id={}".format(client_id, x_id))
+                cs_chain_id = cs["client_state"]["chain_id"]
+                print(cs_chain_id)
+                if chain_id == cs_chain_id:
+                    print("client_id={}, chain_id={}".format(client_id, cs_chain_id))
             except:
                 print(cs)
 
 
 if __name__ == '__main__':
-    print("ibc_scan")
-    scan_clients()
+    print("ibc_scan: scan all info clients/connections/channels/ports between chainA and chainB")
+    parser = OptionParser()
+    parser.add_option("", "--chain_id_a", dest="chain_id_a", help="chain_id", metavar="string")
+    parser.add_option("", "--chain_id_b", dest="chain_id_b", help="chain_id", metavar="string")
+    parser.add_option("", "--url_api_a", dest="url_api_a", help="api endpoint", metavar="string")
+    parser.add_option("", "--url_api_b", dest="url_api_b", help="api endpoint", metavar="string")
+
+    (options, args) = parser.parse_args()
+
+    required = "chain_id_a chain_id_b url_api_a url_api_b".split()
+    for r in required:
+        if options.__dict__[r] is None:
+            parser.error("parameter %s required" % r)
+            parser.print_help()
+            sys.exit(1)
+
+    # if len(args) <= 0:
+    #     parser.print_help()
+    #     sys.exit(1)
+
+    print("chain_id_a={}".format(options.chain_id_a))
+    print("chain_id_b={}".format(options.chain_id_b))
+    print("url_api_a={}".format(options.url_api_a))
+    print("url_api_b={}".format(options.url_api_b))
+
+    print("scan clients on {}".format(options.chain_id_a))
+    scan_clients(options.url_api_a, options.chain_id_b)