# Sevdesk AI integration on Definable

> sevDesk is an online accounting software designed for small businesses and freelancers, offering features like invoicing, expense management, and financial reporting.

## What this connects

sevDesk is an online accounting software designed for small businesses and freelancers, offering features like invoicing, expense management, and financial reporting.

Vendor: https://sevdesk.de

## Tools available

**115** tools available. First 12:

- `SEVDESK_BOOK_INVOICE_AMOUNT` — Book Invoice Amount — Tool to book an invoice amount in SevDesk. Use when you need to record a payment for an invoice, either full or partial. This creates an invoice log entry and updates the invoice status accordingly.
- `SEVDESK_CHECK_CUSTOMER_NUMBER_AVAILABILITY` — Check Customer Number Availability — Tool to check if a customer number is available in sevDesk. Use when you need to verify that a customer number can be assigned without conflicts.
- `SEVDESK_CREATE_ACCOUNTING_CONTACT` — Create Accounting Contact — Tool to create a new accounting contact in sevDesk. Use when you need to assign debitor or creditor numbers to existing contacts for accounting purposes.
- `SEVDESK_CREATE_CHECK_ACCOUNT_TRANSACTION` — Create Check Account Transaction — Tool to create a new check account transaction in SevDesk. Use when you need to manually record a transaction for a payment account, such as bank transfers, cash movements, or other financial transactions that need to be tracked in the accounting system.
- `SEVDESK_CREATE_CLEARING_ACCOUNT` — Create Clearing Account — Tool to create a new clearing account in sevDesk. Use when you need to set up accounts for tracking intermediate transactions like coupons, gift cards, or prepayments. Clearing accounts are offline accounts used for booking purposes.
- `SEVDESK_CREATE_COMMUNICATION_WAY` — Create Communication Way — Tool to create a new contact communication way (email, phone, website, etc.) in SevDesk. Use when you need to add contact information like email addresses, phone numbers, or website URLs to an existing contact.
- `SEVDESK_CREATE_CONTACT` — Create Contact — Creates a new contact (person or company) in SevDesk accounting system. Required fields: - type: Must be 'PERSON' or 'COMPANY' - familyname: Required for PERSON type (last name) - name: Required for COMPANY type (company name) - category: Contact category reference (e.g., id=3 for Customer, id=2 for Supplier) Automatically generates customerNumber if not provided. Supports optional fields like email, phone, address, bank details, tax information, and more.
- `SEVDESK_CREATE_CONTACT2` — Create Contact (REST API) — Tool to create a new contact in sevDesk using the standard REST API endpoint. Use when you need to create a person or organization contact with category assignment.
- `SEVDESK_CREATE_CONTACT_ADDRESS` — Create Contact Address — Tool to create a new contact address in SevDesk. Use when you need to add a new address for an existing contact with street, city, postal code, and country information.
- `SEVDESK_CREATE_CONTACT_CUSTOM_FIELD` — Create Contact Custom Field — Tool to create a custom field for a contact in sevDesk. Use when you need to add custom field values to a contact. Requires references to both the contact and the custom field setting that defines the field type.
- `SEVDESK_CREATE_CONTACT_CUSTOM_FIELD_SETTING` — Create Contact Custom Field Setting — Creates a new contact custom field setting in sevDesk for tracking additional contact information. Use this tool when you need to add custom fields to contacts to store information beyond the standard fields provided by sevDesk (e.g., customer type, lead source, industry classification, or other custom attributes). Once created, these custom fields can be used when managing contacts.
- `SEVDESK_CREATE_CREDIT_NOTE_FROM_INVOICE` — Create Credit Note from Invoice — Tool to create a new credit note from an existing invoice in SevDesk. Use when you need to issue a credit note based on an already created invoice.

## Auth

Auth schemes: `API_KEY`.

## How agents use Sevdesk

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

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

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

## Categories

- accounting — https://definable.ai/apps/category/accounting/

## Related

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