Tenant or user not found when connecting through the shared pooler

A Tenant or user not found error means the shared pooler couldn't match your host and username to a project. Some drivers report it as FATAL: (ENOTFOUND) tenant/user postgres.<project-ref> not found.

The error reads like a credentials problem, so it often sends people to reset a password that was never wrong. The cause is almost always the host or the username, not the password.

The host was typed instead of copied#

Shared pooler hosts look like aws-1-us-east-2.pooler.supabase.com. The number is a pooler cluster index, not part of the region name, and a region can have more than one. aws-0 is not a safe default, and you can't work the host out from your region.

Copy the host from the Connect dialog rather than composing it.

The username is missing the project ref#

Shared pooler connections use postgres.[PROJECT-REF], not postgres. Direct connections and the dedicated pooler use postgres.

If you connect as a custom role through the shared pooler, the username is [ROLE].[PROJECT-REF]. Supplying only the role name, with no project ref, produces this error rather than an authentication failure.

How to fix it#

1. Open the Connect dialog in the Supabase Dashboard.
2. Choose Session pooler or Transaction pooler.
3. Copy the whole string, and replace only the password placeholder.

For the full set of hosts, ports, and usernames, see Connect to your database.