The billing frameworkfor Swiss software.

Pick what your product needs.

Each kit works on its own, and they all share one adapter, one customer and one payment provider. Same kit, same behaviour, in every programming language we ship.

later: eventkit (Events, registrations, tickets, waitlists), bookingkit (Appointments, resources, reservations), invoicekit (One-off invoices with QR-bill, no subscription), mailkit (Newsletters, lists, double opt-in)

Not localised later. Swiss from the first line.

Generic billing libraries think in Stripe, cents and one language. Swiss customers pay by QR-bill and TWINT, expect VAT on every invoice and read it in German, French or Italian. agentkit starts there.

Swiss QR-billlive

Payment part per SIX guidelines, QR-IBAN with QR reference or IBAN with RF creditor reference. CHF and EUR. Scan-to-pay in every Swiss banking app.

TWINT via zahls.chlive

Payments through zahls.ch with TWINT and credit cards. Card data never touches your server. Other providers plug in through one interface.

VAT done rightlive

Inclusive or exclusive prices, VAT line and CHE number on every invoice, integer Rappen instead of floats. Per-line rates (8.1 / 2.6 / 3.8 %) and 5-Rappen rounding are next.

de · fr · it · enlive

UI, emails and invoices in German, French, Italian and English, with Swiss formats: 15.10.2026, CHF 1’900.00, «guillemets», ss instead of ß.

Bank reconciliationnext

Import camt.054 / camt.053 from your bank, match QR references to open invoices and mark them paid. No more manual matching of bank statements.

Reminders, Swiss stylenext

Today: payment terms, automatic retries and reminder emails. Next: 1st, 2nd and 3rd reminder with fees, reminder PDFs with a fresh QR-bill, export for debt collection.

revDSG friendlyby design

The kits run in your app and write to your database. No extra processor for your customer data – host it in a Swiss data centre if you like.

eBillplanned

Deliver invoices straight into the e-banking of your customers through the Swiss eBill network, with the QR-bill as fallback.

A library in your app. Not a service in front of it.

One spec. Native in every stack.

Every kit is defined once – schema, rules, HTTP API, emails, translations – and implemented natively per programming language. A shared conformance suite runs the same billing scenarios against each implementation, so a renewal in PHP produces exactly the rows a renewal in TypeScript does. The React UI talks to both.

Everything around the money, done once.

Declared in code. Reviewed in pull requests.

Kits describe their tables declaratively. The CLI turns that into a schema or migration for the ORM you already use – Drizzle, Prisma, Eloquent, Doctrine – and every adapter passes the same conformance suite.

import { agentkit } from '@agentkit/core';
import { drizzleAdapter } from '@agentkit/drizzle';
import { subkit } from '@agentkit/subkit';
import { shopkit } from '@agentkit/shopkit';
import { membershipkit } from '@agentkit/membershipkit';
import { zahls } from '@agentkit/zahls';

export const kit = agentkit({
  database: drizzleAdapter(db, { tablePrefix: 'ak_' }),
  payments: zahls({ instance: 'acme', apiKey: env.ZAHLS_KEY }),
  kits: [
    subkit({ plans, defaultPlanId: 'free' }),
    shopkit({ currency: 'CHF', vat: { rateBps: 810 } }),
    membershipkit({ seasons: 'yearly', invoiceWith: 'subkit' }),
  ],
});

kit.on('shop.order.paid', async ({ order }) => fulfil(order));

Extracted from production, one kit at a time.

Every kit comes from code that already runs in production and is pulled out once it has proven itself.

1. 1

   core + subkit

   Q4 2026 – now

   Adapter contract and test suite, Drizzle adapter, subkit 0.1 with QR-bill, VAT and zahls.ch/TWINT on npm. Docs in German and English.

2. 2

   subkit for PHP

   Q1 2027

   Conformance suite as language-neutral fixtures, PHP port with Eloquent, Doctrine and PDO adapters, Laravel and Symfony integration.

3. 3

   membershipkit

   Q1 2027

   Fee invoices through subkit. camt.054 bank reconciliation.

4. 4

   shopkit & more

   2027

   Catalogue, cart, TWINT checkout, Swiss Post shipping, vouchers. eBill, then eventkit and bookingkit.

Roll your own billing – in minutes, not months.

Ship the product. Let the kits handle subscriptions, orders and members – Swiss-ready, in your database, under your control.