Any data placed into connection URIs or transmitted over the network (e.g., JSON payloads/headers) must be encoded/serialized according to the protocol’s rules.

• URIs (userinfo: username/password): Percent-encode all characters in the username/password except RFC “unreserved” (A-Z a-z 0-9 - . _ ~) and “sub-delims” (! $ & ' ( ) * + , ; =).
• JSON/network metadata: Ensure values are JSON-serializable; don’t emit raw UUID objects—convert to a string representation (commonly .hex or str(uuid)).

Example:

from uuid import uuid4
from urllib.parse import quote

user = quote('alice+team', safe='')
password = quote('p@ss:word', safe='')
uri = f"amqp://{user}:{password}@host/vhost"

# For JSON/headers:
monitoring_id = uuid4().hex  # not uuid4() directly
headers = {"monitoring_id": monitoring_id}