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How sub-account authentication works

Every sub-account has its own credentials, separate from the parent account. A request authenticated with a sub-account API key is treated as that sub-account: it sends from the sub-account’s quota, writes to the sub-account’s suppression list, and triggers the sub-account’s webhooks. Sub-accounts have access to the full API and Console. Sub-accounts cannot create sub-accounts. To get the sub-account ready to send, create at least one API key. Use the parent API key when using the sub-account API to create a sub-account API key. Sub-accounts can manage their own API keys. Or a parent account can manage sub-account keys using the sub-account API.