📋 Finance · All integrations

Validated customer addresses in Billy

Make sure new contacts in Billy are created with correct, authoritative Danish addresses — via your own flow or Zapier.

Billy's API (/v2/contacts) accepts address fields as free text. One call to /datavask/adresser before creation ensures what lands in your books matches a real DAR address.

How to set it up

  1. Get an API key
    Free account on the dashboard → copy dawa_live_….
  2. Find your creation flow
    Webshop orders, quote forms or manual creation via an internal tool.
  3. Cleanse the address first
    /datavask/adresser returns category A/B/C + the correct address with postcode and city.
  4. Create the contact in Billy
    POST to Billy's /v2/contacts with the cleansed address.
# Datavask before contact creation in Billy
# Vask kundens adresse før oprettelse i Billy
curl 'https://api.danadresse.dk/datavask/adresser?betegnelse=N%C3%B8rregade+7,+1165+K%C3%B8benhavn+K' \
     -H 'X-Api-Key: dawa_live_…'

# → POST den vaskede adresse til Billy's API (/v2/contacts)

Good to know

Zapier bridge

Billy is on Zapier — combine it with a Webhooks step against our API, no code at all.

Web forms

Using a form for new customers? Put the JS widget on the address field so input is valid from the start.

Audit-ready records

Correct addresses on vouchers and invoices — less friction at audit time.

Ready to try it with Billy.dk?

Free Hobby key, no credit card — the API answers in under 100 ms.

Get an API key →

API docs · Code examples · JS widget