You can either use the session-wide link, persistent links, or single-use links.

Session-wide link

During testing, you can open this link in up to 3 tabs.

http://otree-engine.ink/join/dosumija

Persistent links

For a real session, you should use a room.

Single-use links

Below are single-use links, which you can distribute to your participants. Each link has a unique code for the participant.

P1	http://otree-engine.ink/InitializeParticipant/4pdl2v18
P2	http://otree-engine.ink/InitializeParticipant/dm5muq1r
P3	http://otree-engine.ink/InitializeParticipant/h1qv4t7f