Zahlo Merchant Developer Docs - Zahlo Merchant Developer Docs

Zahlo gives merchants one API for checkout, payments, subscriptions, invoices, payment links, and commerce integrations. Use hosted checkout when you want the fastest launch, or use the SDK and API when you need a tailored experience.

Choose your path

Goal	Start with
Launch a first payment	Quickstart
Add checkout to a website	Checkout guide
Sell through a shareable URL	Payment links
Start recurring billing	Subscriptions
Integrate an online store	WooCommerce
Explore every endpoint	API Reference

Integration principles

Keep merchant API keys on your server.
Use short-lived client tokens for browser checkout state.
Treat webhooks as the source of truth for fulfillment and subscription state.
Send an idempotency key when retrying create requests.
Never collect or store raw card data in your application.