The 1inch Business Portal is where you create API keys, manage your subscription, and monitor your API usage.
Creating an account
Registration is self-serve: sign up with your email at business.1inch.com. No approval is needed. New accounts start on the free Dev plan; see How to increase your 1inch API rate limits for the paid plans.
Logging in
Login works via github, google or you can use a one time valid magic link sent to your email. If the email does not arrive within a few minutes, check your spam folder. If it still does not arrive, contact support.
Using the APIs
You can create and rotate your API key via the applications page.
Joining your company's existing organization
The organization's Owner invites you from Settings -> Users. A user can belong to only one organization, so delete your own account first if you already created one. The number of users depends on the plan; see Understanding and managing user roles in 1inch Business.
1inch does not create accounts for you: registration is self-serve, and access to an existing organization comes from that organization's Owner.