Developer guides

Printing from a backend looks simple until the first lost ticket. These articles cover the Expedy REST API in real conditions: ESC/POS layout, logos and QR codes, PDF printing, retries and idempotency, offline printers, and integration from Node.js, Python, PHP or Go.

Self-hosted print server or cloud print API: the honest build versus buy

CUPS plus a small service looks like a weekend. The weekend is real; the three years after it are the decision. What self-hosting actually costs, and when it is still the right call.

Reliable order printing: idempotency, retries and the offline printer

Printing looks like fire and forget until the first duplicate ticket. Three decisions cover almost every production incident: answer the webhook first, key the job, and define the offline policy.