diff --git a/tls_certificate.py b/tls_certificate.py
new file mode 100755
index 0000000..0c0e692
--- /dev/null
+++ b/tls_certificate.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+import socket
+import ssl
+
+def get_server_certificate(hostname, port=443):
+    # context = ssl.create_default_context()
+    context = ssl._create_unverified_context()
+
+    with socket.create_connection((hostname, port)) as sock:
+        with context.wrap_socket(sock, server_hostname=hostname) as ssock:
+            cert = ssock.getpeercert()
+            return cert
+
+# not success, but why?
+if __name__ == "__main__":
+    certificate = get_server_certificate("hatter.ink")
+    print(f"Certificate: {certificate}")
+    for key, value in certificate.items():
+        print(f"{key}: {value}")
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