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Create a new checkout session in Quaderno. Returns a URL to redirect your customer to complete payment.
Create a new invoice in Quaderno. Requires a contact and at least one line item. Invoices cannot be deleted; use credit notes for refunds.
Retrieve a single estimate by ID from Quaderno.
Delete a payment record from an invoice, credit note, or expense in Quaderno.
Delete an estimate from Quaderno.
Update an existing contact's details in Quaderno. Only the provided fields will be updated.
Send a credit note to the customer via email.
Retrieve a single contact by ID from Quaderno, including all their details such as address, tax ID, and preferences.
Create a new business expense (purchase) in Quaderno. Expenses can be associated with contacts and include payment records.
Retrieve a list of credit notes from Quaderno. Credit notes are used for refunds and corrections since invoices cannot be deleted.
Retrieve a list of contacts (customers and vendors) from Quaderno. Supports searching by name, email, or tax ID.
Retrieve a list of business expenses (purchases) from Quaderno.
Delete a recurring document template from Quaderno. This stops future document generation.
Send an invoice to the customer via email. The invoice will be delivered in the customer's preferred language and format.
Delete a contact from Quaderno. Contacts with associated documents (invoices, credit notes, expenses) cannot be deleted.
Create a new recurring document in Quaderno. Recurring documents automatically generate invoices, expenses, or estimates at the specified interval.
Update an existing expense in Quaderno. Only the provided fields will be updated.
Retrieve the list of tax jurisdictions where the business is registered for tax collection. Useful for understanding where the business has tax obligations.
Create a new estimate (quote/proforma) in Quaderno. Estimates can be sent to clients and later converted to invoices.
Record a payment against an invoice, credit note, or expense in Quaderno. Supports partial payments.
Update an existing invoice in Quaderno. Only the provided fields will be updated.
Check the status of a previously requested tax report. When completed, provides a download URL for the report.
Retrieve a list of estimates (quotes/proformas) from Quaderno. Estimates can later be converted to invoices.
Validate a tax identification number (VAT number, GST number, etc.) against official registries such as EU VIES. Returns whether the tax ID is valid along with associated details.
Retrieve a single credit note by ID from Quaderno.
Retrieve a list of checkout sessions from Quaderno. Abandoned sessions are automatically removed after seven days.
Retrieve a list of recurring document templates from Quaderno. Recurring documents automatically create invoices, expenses, or estimates at configurable intervals.
Request a tax report from Quaderno. Reports are generated asynchronously. Use the "Get Report Status" tool to check when it is ready and retrieve the download URL.
Update an existing product in Quaderno. Only the provided fields will be updated.
Delete an expense from Quaderno.
Retrieve a single expense by ID from Quaderno.
Delete a product from Quaderno.
Retrieve a single invoice by ID from Quaderno, including all line items, amounts, and contact details.
Create a new credit note in Quaderno. Used for issuing refunds or corrections against invoices. Supports partial refunds.
Retrieve a list of invoices from Quaderno. Supports filtering by search query, date, and state.
Record a sale or refund transaction in Quaderno. Quaderno uses this data for invoices, tax reports, and compliance alerts. Location evidence is used to determine the correct tax treatment.
Send an estimate to the client via email.
Remove a tax jurisdiction registration. Quaderno will no longer calculate taxes for this jurisdiction.
Retrieve a list of products (items) from Quaderno. Products can be used as line items on invoices, credit notes, and expenses.
Calculate the applicable tax rate for a transaction based on the customer's location, product type, and tax jurisdiction. Useful for determining the correct sales tax, VAT, or GST at checkout. Covers 12,000+ tax jurisdictions worldwide.
Create a new contact (customer or vendor) in Quaderno. Contacts appear on invoices, credit notes, and expenses.
Create a new product in Quaderno. Products can be reused as line items on invoices, credit notes, and expenses.
Register a new tax jurisdiction where the business will collect taxes. This enables Quaderno to calculate taxes for this jurisdiction.