DocuPost

Return the connected DocuPost account's numeric balance. This read does not reveal currency, plan, tier, or sandbox status.

Submit one letter for paid printing and U.S. postal delivery. This is a non-idempotent physical-mail operation: one call can deduct funds and create real mail, so confirm all content and addresses bef

Submit one postcard for paid printing and U.S. postal delivery. This is a non-idempotent physical-mail operation: one call can deduct funds and create real mail, so confirm both artworks and all addre