Books an invoice.

Books a voucher.

Cancels an invoice.

Checks if a given customer number is available or already used.

Checks if an invoice is already partially paid.

Creates a new contact communication way.

Creates a new contact.

Creates a new contact address.

Creates a new accounting contact.

Creates a new invoice.

Creates a new order.

Creates a new order position for an order.

Creates a new part in your sevDesk inventory.

Creates a new voucher.

Deletes a communication way.

Deletes an invoice.

Deletes an order.

Retrieves a PDF document of an invoice.

Returns the current stock amount of the given part.

Performs an arbitrary authorized API call.

Marks an invoice as sent by a chosen send type.

Renders a PDF document of an invoice.

Sends a specified invoice via email.

Updates an existing contact.

Updates an existing order.

Updates an existing part.

Updates an existing voucher.

Uploads a voucher file.

Retrieves a single contact.

Retrieves a single invoice.

Retrieves a single order.

Retrieves a single part.

Retrieves a single voucher.

Searches for communication ways or lists them all.

Searches for contacts or lists them all.

Searches for invoices or lists them all.

Searches for order positions or lists them all.

Searches for orders or lists them all.

Searches for parts or lists them all.

Searches for voucher positions or lists them all.

Searches for vouchers or lists them all.