> ## Documentation Index
> Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# upsertCompany

> Creates a new company or updates an existing one identified by `companyId` or `companyDomainName`. The output includes a `result` field of either `CREATED` or `UPDATED` so you can tell which happened. You can pass a bare domain (e.g. `plain.com`) or a full URL and Plain will extract the domain. Requires the `company:create` and `company:edit` permissions.