diff --git a/krypt.py b/krypt.py
new file mode 100644
index 0000000..11b800f
--- /dev/null
+++ b/krypt.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+
+import json
+from base64 import b64encode
+from datetime import datetime, timedelta, timezone
+from hashlib import sha512
+from random import randbytes  # for iv?=...
+
+from fastapi import FastAPI, HTTPException, WebSocket, WebSocketDisconnect
+from fastapi.responses import (FileResponse, HTMLResponse, JSONResponse,
+                               RedirectResponse)
+from jwt import JWT, jwk_from_dict, jwk_from_pem
+from jwt.utils import get_int_from_datetime
+
+instance = JWT()
+
+message = {
+    'iss': 'https://pamir-academy.github.io/',
+    'sub': 'npub1fx6036g40wq40c2nqgrssa0xxx8jx4hawgks8uujwxhjaa9scwysshkwcg',
+    'iat': get_int_from_datetime(datetime.now(timezone.utc)),
+    'exp': get_int_from_datetime(
+        datetime.now(timezone.utc) + timedelta(hours=2)),
+}
+
+"""
+Encode the message to JWT(JWS).
+"""
+
+# Load a RSA key from a JWK dict.
+signing_key = jwk_from_dict({
+    'kty': 'RSA',
+    'e': 'AQAB',
+    'n': '...',
+    'd': '...'})
+# Or load a RSA key from a PEM file.
+with open('rsa_private_key.pem', 'rb') as fh:
+    signing_key = jwk_from_pem(fh.read())
+# You can also load an octet key in the same manner as the RSA.
+# signing_key = jwk_from_dict({'kty': 'oct', 'k': '...'})
+
+compact_jws = instance.encode(message, signing_key, alg='RS256')
+
+"""
+Decode the JWT with verifying the signature.
+"""
+
+# Load a public key from PEM file corresponding to the signing private key.
+with open('rsa_public_key.json', 'r') as fh:
+    verifying_key = jwk_from_dict(json.load(fh))
+
+message_received = instance.decode(
+    compact_jws, verifying_key, do_time_check=True)
+
+"""
+Successfuly retrieved the `message` from the `compact_jws`
+"""
+assert message == message_received
+api = FastAPI()
+
+@api.get('/')
+def app():
+    # logic..[Thinking..]
+    return RedirectResponse('/#home') # inject TS here.
+
+
+if __name__ == '__main__':
+    # REST: 55555 + ws: 2580
+    __import__('uvicorn').run(host='0.0.0.0', port=55555)
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