Getting access
Project Zero access is granted per Tessen account, and you can check it at any time.
Your developer identity is your Tessen identity — there is no separate developer account. Sign in to Tessen Platform with Google, email, or GitHub where it is offered.
Check your access
tessen zeroIt answers three things from the Gateway itself: whether your account has Project Zero access, whether Project Zero can serve right now, and when today's window resets. The same answer is available from the API.
curl https://api.tessen.ai/v1/zero/status \
-H "Authorization: Bearer $TESSEN_ZERO_KEY"Without access
A request from an account without access is refused with 403 zero_entitlement_required. It is never charged, and never served on paid capacity instead.
Eligibility is decided by Tessen's servers, never by the CLI or by OpenCode's configuration. Editing a config file cannot grant access.