Business accounting, as an API. Built for platforms.

Nordlet is a cloud accounting API for marketplaces and platforms that need real books: ledgers, payouts and EU tax, running inside your own product instead of someone else's checkout.

API-first, developer-nativeOne REST endpoint set, typed SDKs, and webhooks. Post an entry in the same request you settle a sale.
Compliant & audit-readyImmutable double-entry ledger, per-country VAT, and an exportable audit trail your accountant will actually trust.

POST /v1/ledger/entries

# Record a marketplace sale: books and VAT in one call
curl https://api.nordlet.com/v1/ledger/entries \
  -H "Authorization: Bearer sk_live_9f2a…" \
  -d '{
    "seller_id": "acct_204",
    "type": "sale",
    "amount": 4800,
    "currency": "EUR",
    "vat": { "rate": 0.21, "country": "NL" }
  }'