You're asking whether you can get the exact session start time from an

AgentSession

. Yes — there isn't a built‑in

start_time

property, but you can record the timestamp when the session actually starts and attach it to the session or JobContext. A simple approach: 1. Capture the time in your

entrypoint

right before/when you call

session.start()

. 2. Store it on the session (e.g.,

session.userdata["session_start_time"]

) or log it via

ctx

for later use. Example (Python):

import datetime

@server.rtc_session()
async def entrypoint(ctx: JobContext):
    session_start_time = datetime.datetime.now(datetime.timezone.utc)
    session = AgentSession(...)
    session.userdata["session_start_time"] = session_start_time
    await session.start(agent=MyAgent(), room=ctx.room)
    await ctx.connect()

If you need higher precision or an event-based marker, emit a custom

start

event from the agent when the room connection completes or use your observability tooling to record the exact moment the connection is established. Sources: Agents (Node.js) | livekit/livekit_composite | DeepWiki