Mercato — a ProcessWire-native commerce toolkit

maximus · 2026-06-30T21:56:34Z

Hi everyone,

I’m happy to share the first public testing release of Mercato, a ProcessWire-native commerce toolkit.

Mercato is not just a “shop template” or a simple cart module. The goal is to provide a flexible commerce layer that works the ProcessWire way: pages, templates, fields, permissions, hooks, and site-level customization.

The basic idea is:

Your website should not have to become “the shop system”.
The shop should become part of your ProcessWire site.

Mercato can be used as a full storefront, but it is also designed for custom ProcessWire websites that need commerce features without being forced into a rigid shop structure.

What Mercato includes

Products as ProcessWire pages
Cart and checkout
Orders stored as ProcessWire pages
Stripe, Mollie, PayPal, bank transfer, and demo payment support
Discounts and coupons
Inventory handling
Preorder and backorder support
Digital products and downloads
Fulfilment: carrier delivery, store pickup, local delivery
Customer records
Abandoned checkout recovery tools
Refunds and payment operation tracking
Webhook/event logs
Reports and CSV exports
Launch-readiness checklist
Public order status and receipt pages
Headless/read API surfaces
A complete installable demo storefront

Demo storefront

A fresh install creates a real demo storefront called Arlberg Ceramics.

It is not just placeholder content. The demo includes:

physical products
digital products
gift cards
product collections
product images
discounts
low-stock products
sold-out states
preorder/backorder examples
checkout policy pages
order confirmation pages
delivery, pickup, and local delivery scenarios

The demo is meant to help developers test the full commerce flow immediately after installation.

Existing sites

Mercato is designed to add commerce functionality to an existing ProcessWire site without taking over the whole website.

It creates Mercato-specific fields, templates, pages, permissions, products, collections, and order storage. It does not remove existing site content. Bundled storefront template files are copied into /site/templates/ only when the target files are missing. Existing template files are not replaced unless template overwrite is explicitly enabled in the module settings.

That said, this is a commerce module and it changes the site schema, so please test on a staging copy first and make a backup before installing it on an existing/production site.

Current status

This is the first public release and should be treated as a testing release.

I have tested the installer, demo storefront, checkout flow, admin screens, and basic payment workflows, but I would really appreciate feedback from real ProcessWire projects and different hosting setups.

Things I’m especially interested in: