Guides

Build a checkout with the API. Create a cart, take a card, PayPal or Apple Pay payment, handle 3-D Secure and declines, and capture or void later.

Get events such as order created or payment completed sent to your server, check the signature, answer fast, skip repeats and resend failed events.

Sell a subscription with a plan and a cart, follow renewals with webhooks, change items with proration, cancel, retry failed payments and handle grace periods.

Bill a customer with an invoice. Add products or custom items, publish the draft, send a payment link, take payment by API and follow the invoice events.

Give money back with the API. Refund a whole order or part of it by amount or items, refund one payment, refund to store credit and follow the refund events.

A checklist for moving your Comecero integration from test to live mode. Tokens, gateways, webhooks, test leftovers, error handling and safe payment retries.