# Quaderno AI integration on Definable

> Quaderno is a tax compliance platform that automates tax calculations, invoicing, and reporting for businesses worldwide.

## What this connects

Quaderno is a tax compliance platform that automates tax calculations, invoicing, and reporting for businesses worldwide.

Vendor: https://quaderno.io/

## Tools available

**76** tools available. First 12:

- `QUADERNO_ADD_EXPENSE_PAYMENT` — Add Expense Payment — Adds a payment to an existing expense in Quaderno. Use when you need to record a payment received for an expense. Returns the payment record with ID, amount in cents, and payment method details.
- `QUADERNO_CALCULATE_TAX_RATE` — Calculate Tax Rate — Tool to calculate applicable tax rate for given address and transaction type. Use when you need tax details before invoicing.
- `QUADERNO_CREATE_CONTACT` — Create Contact — Tool to create a new contact (customer or vendor). Use when you need to add a person or company contact in Quaderno.
- `QUADERNO_CREATE_COUPON` — Create Coupon — Tool to create a new discount coupon in Quaderno. Use when you need to create either a percentage-based or fixed-amount discount coupon. Either percent_off or amount_off must be provided (but not both). For amount_off coupons, currency is required.
- `QUADERNO_CREATE_ESTIMATE` — Create Estimate — Creates a new estimate/quote in Quaderno for a customer with line items. Returns estimate with ID, number, permalink, and total amounts in cents. Use this when you need to create a cost estimate or quote for a project or service.
- `QUADERNO_CREATE_EVIDENCE` — Create Evidence — Tool to create a new location evidence for tax compliance. Use when you need to create evidence records with billing country, IP address, or bank country information for verifying customer location.
- `QUADERNO_CREATE_EXPENSE` — Create Expense — Tool to create a business expense in Quaderno. Use when you need to record an expense from a supplier or vendor with line items and optional attachments.
- `QUADERNO_CREATE_INVOICE` — Create Invoice — Creates a new invoice in Quaderno for a customer with line items. Returns invoice with ID, number, permalink, PDF URL, and total amounts in cents. Use this when you need to bill a customer for products or services.
- `QUADERNO_CREATE_PRODUCT` — Create Product — Creates a new product that can be used as a line item in invoices, credit notes, and expenses. Use this to register products with their SKU, pricing, tax classification, and other details in your Quaderno account.
- `QUADERNO_CREATE_RECEIPT` — Create Receipt — Creates a new receipt in Quaderno documenting payment for goods or services. Returns receipt with ID, number, permalink, PDF URL, and total amounts. Use when you need to create a receipt for a completed transaction.
- `QUADERNO_CREATE_RECURRING` — Create Recurring — Tool to create a recurring document in Quaderno that automatically generates invoices on a schedule. Use when setting up subscription billing or periodic invoices for a customer.
- `QUADERNO_CREATE_REPORT_REQUEST` — Create Report Request — Tool to request a new report generation in Quaderno. Use when you need to generate tax summaries, invoice lists, or credit note lists for a specific date range. Reports are generated asynchronously - this action returns immediately with a 'pending' state. Use the List Reporting Requests action to poll for completion status and retrieve the download URL when the report is ready.

## Auth

Auth schemes: `API_KEY`.

## How agents use Quaderno

Inside a Definable workflow, Quaderno is one of the tools the **Distributor specialist** can call. Example coordination patterns:

- **Researcher → Quaderno** — the Researcher (GPT-5.5) pulls context from Quaderno (records, threads, documents), synthesises findings, and briefs the rest of the team.
- **Writer → Distributor → Quaderno** — the Writer (Claude Opus 4.7) drafts copy in brand voice, the Verifier passes it, then the Distributor writes the result into Quaderno (create record, post message, draft email).
- **Designer / Engineer → Distributor → Quaderno** — the Designer ships an asset or the Engineer ships a code change, the Distributor delivers it via Quaderno (attach file, open PR comment, post status).

The Verifier checks every Quaderno call. On rate limit, schema drift, or auth refresh it self-heals and retries — the workflow completes without manual intervention.

## Categories

- taxes — https://definable.ai/apps/category/taxes/
- accounting — https://definable.ai/apps/category/accounting/
- proposal & invoice management — https://definable.ai/apps/category/proposal-&-invoice-management/

## Related

- HTML page: https://definable.ai/apps/quaderno/
- Same category (taxes): https://definable.ai/apps/category/taxes/
- All integrations: https://definable.ai/apps/
- Workflow (multi-agent loop): https://definable.ai/workflow/
- Apps llms.txt index: https://definable.ai/llms-apps.txt