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

# Account

- [API Keys](https://docs.nebulablock.com/account/api-keys.md): Create, reveal, disable, and delete Nebula Block API keys, including team keys, and keep them secure.
- [Tiers and Rate Limits](https://docs.nebulablock.com/account/tiers-and-limits.md): Nebula Block's four tiers and what each unlocks: RPM, TPM, RPD, per-model daily caps, credit ceilings, and CPU/GPU access.
- [Teams](https://docs.nebulablock.com/account/teams.md): Create a Nebula Block team, invite members, assign roles and permissions, and share API keys and resources.
- [Referral Program](https://docs.nebulablock.com/account/referral.md): Earn commission on the spend of users you refer to Nebula Block, and apply a referral code to your account.