> For the complete documentation index, see [llms.txt](https://docs.definest.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.definest.ai/welcome/invitation-codes.md).

# Invitation codes

Definest.ai is a closed service; you cannot register without an invitation. Invitations can be obtained from people who already have an account on the Definest website.

Invitations are also sometimes issued:

* In our [Telegram channel](https://t.me/definest_ai)
* In our [Telegram group](< https://t.me/+zUj_adwqWK9hOTg0>)