iDirectDebit provides payment processing services in the UK and abroad including paper and paperless Direct Debits, credit cards, debit cards, checks and postal orders. The iDirectDebit API allows service users to integrate sign up functionality into third party applications. The API supports the creation of a customized Direct Debit sign up wizard and allows Direct Debit Instructions (DDIs) to be easily managed and maintained. It provides users with control over branding, payer sign up, Direct Debit collections, edits, confirmation and reports. The API uses RESTful calls and responses are formatted in XML. Full documentation is not publicly available.