The Reseller API is for companies with which SendGrid has formal reseller partnerships, such that billing and usage can be integrated. If you don't have a formal partnership with SendGrid, you will not have permission to use this API. Check the Customer Subuser API if you need sub-account functionality.
Following are brief descriptions of the various API calls needed to manage your customers. Click the API call name for further details:
Retrieve, create, enable, and disable your customers. Change a customer's email address and username.
Retrieve your customers' statistics.
Manage your customers' bounce records.
Manage your customers' unsubscribes.
Manage your customers' invalid emails.
Manage your customers' spam reports.
Manage the rate at which your customers are able to send email.
Get and/or edit the timezone for reseller customers.
Make sure your customers aren't sending out spam by getting a sample of their outgoing messages.
List all IP addresses you have under your account, and retrieve details about those IP addresses.
Manage domain authentication settings for your customers.
Manage your customers' event notification URLs.
Validate a customer's password with the SendGrid system.
Setup your customers' parse settings.
Setup your customers' app settings.
Retrieve your invoices.
Upgrade, downgrade, or close a customer's account.
List all SendGrid packages available to your account.
Review your customers' account overview.