payment integration

Found 3 articles tagged with "payment integration"

How to Validate a Credit Card Number

Strip spaces, check for 12 to 19 digits, run the Luhn checksum, then match the prefix to a brand. Working code in JavaScript, Python and Java, plus the errors.

DevToolLab Team·September 29, 2026

Latest Articles

Guide

9 min

Best Usage-Based Billing Platforms 2026

Stripe bought Metronome and Adyen bought Orb in 2026. The metered billing options that are still independent, with verified prices, licenses and versions.

DevToolLab Team·September 22, 2026

Best Merchant of Record Platforms in 2026

Guide

9 min

Best Merchant of Record Platforms in 2026

Paddle, Lemon Squeezy, Polar, Stripe Managed Payments and FastSpring compared on real fees, and why merchant of record has no open source alternative.

DevToolLab Team·September 12, 2026