OnBuy Integration for WooCommerce

Key Features

Real-time inventory synchronization from WooCommerce to OnBuy via product/variation stock-change hooks, so quantity sold on either channel updates the other and prevents overselling

Bulk product upload that reads your existing WooCommerce `product` and `product_variation` post types and publishes them to OnBuy in batched API jobs

OnBuy order import as native WooCommerce orders, fully HPOS / custom-order-table compatible and tagged with the OnBuy order reference

Category, attribute and brand mapping UI that aligns OnBuy's marketplace taxonomy with your WooCommerce product attributes and global terms

Configurable price and stock rules — marketplace-specific markups, rounding, and safety-stock buffers applied per product or category

OnBuy Seller API authentication managed from a dedicated wp-admin settings screen with consumer key/secret stored securely

WP-Cron reconciliation pass that periodically re-checks stock and price drift and corrects OnBuy listings even if a real-time event is missed

Listing status and error log in wp-admin showing which SKUs published, which were rejected by OnBuy, and why (missing EAN, category, image, etc.)

EAN / GTIN / OPC matching so existing OnBuy catalogue listings are joined rather than duplicated

Order status and tracking write-back to OnBuy when a WooCommerce order is marked complete or shipped

WooCommerce REST API and standard WordPress hooks/filters used throughout, so the integration is extensible and theme-agnostic

WPML and WooCommerce multisite aware — built to fit multi-language or multi-store setups when present

Manual re-sync and per-product 'push to OnBuy' actions from the WooCommerce product list for one-off corrections

Rate-limit aware batching that respects OnBuy API throttling so large catalogues sync without being blocked

Built to order, done for you

No DIY setup — a working app, built, installed and supported by ECOSIRE.

You order

Start with a one-time build price. We scope it with you at kickoff.

We build & install

ECOSIRE builds, configures and installs it on your WooCommerce.

Go live + support

You go live in about 2–4 weeks, with a post-launch support window.

About this Product

OnBuy Integration for WooCommerce connects your existing WooCommerce store to the OnBuy marketplace so you can list catalogue, sync stock and pull OnBuy orders into the same wp-admin you already run your shop from. This is not an instant download from WooCommerce.com or WordPress.org — it is a plugin that ECOSIRE builds, installs and configures on your WordPress site, then supports.

The plugin authenticates against the OnBuy Seller API (OAuth-style consumer key/secret stored in a dedicated wp-admin settings screen) and uses WooCommerce product data as the source of truth. A bulk-publish job reads your product and product_variation post types, maps them to OnBuy listings by OPC / EAN / GTIN, and pushes them in batches. Inventory and price changes flow continuously: a WooCommerce woocommerce_product_set_stock / woocommerce_variation_set_stock hook plus a WP-Cron reconciliation pass keep OnBuy quantities aligned with your real stock, so you don't oversell across channels.

Incoming OnBuy orders are imported as native WooCommerce orders — fully HPOS (High-Performance Order Storage) compatible, written to the custom order tables, tagged with the OnBuy order reference so fulfilment, emails and reporting behave exactly like an on-site sale. Category, attribute and brand mapping is configurable so OnBuy's taxonomy lines up with your WooCommerce attributes, and price/stock rules let you set marketplace-specific markups or quantity buffers.

Because we build it for you, the integration is shaped around your catalogue, theme and hosting — including WPML or multisite setups. You get a clear delivery lead time, a working install, and ongoing support from the ECOSIRE team rather than a generic plugin you debug alone.

What you get

Custom-built OnBuy Integration plugin installed and activated on your WordPress / WooCommerce site by ECOSIRE

OnBuy Seller API connection configured and tested against your live seller account

Category, attribute and brand mapping set up for your actual catalogue structure

Initial bulk listing run of your products to OnBuy with a published-vs-rejected report

wp-admin settings, sync and error-log screens configured and walked through with your team

Short handover document covering settings, re-sync actions and how the WP-Cron reconciliation works

Defined post-launch support window for fixes, OnBuy API changes and questions

Who this is for

UK WooCommerce Seller Diversifying Channels

An established WooCommerce merchant who wants OnBuy as a second UK sales channel without running a separate inventory system. Needs stock kept in sync automatically so the same item never sells twice across the site and the marketplace.

Operations / Fulfilment Manager

Runs day-to-day order processing in wp-admin and wants OnBuy orders to land as normal WooCommerce orders — same picking, packing, emails and reports — rather than logging into a separate OnBuy dashboard and re-keying data.

Growing Brand Owner Without a Dev Team

Owns the products and the WooCommerce store but has no in-house developer to build or maintain a marketplace connector. Wants ECOSIRE to build, install and support the integration so they can focus on selling, not on API plumbing.

How OnBuy Integration for WooCommerce Compares

Criterion	ECOSIRE	Custom Build	Competitor
Real-time WooCommerce-to-OnBuy stock sync (prevents overselling)	Included	Partial support	Partial support
OnBuy orders imported as native HPOS-compatible WooCommerce orders	Included	Partial support	Partial support
Bulk listing with EAN/GTIN matching and rejection reporting	Included	Partial support	Partial support
Built, installed and configured for your exact catalogue and hosting	Included	Included	Not included
Vendor-applied updates when the OnBuy Seller API changes	Included	Not included	Partial support
Instant self-serve download / immediate activation	Not included	Not included	Included
One-time price with no per-order marketplace commission to the tool vendor	Included	Included	Partial support
Category/attribute/brand mapping tailored to your store taxonomy	Included	Partial support	Partial support

Frequently Asked Questions about OnBuy Integration for WooCommerce

Is this an instant download I can install myself from WooCommerce.com?

No. OnBuy Integration for WooCommerce is build-to-order. ECOSIRE builds the plugin for your specific catalogue and hosting, then installs, configures and tests it directly on your WordPress site. There is no public marketplace download link — the value is a working, supported integration rather than a generic plugin you set up alone.

How long does delivery take after I order?

Typical delivery is around 2 to 3 weeks from the point we have access to your site and OnBuy Seller API credentials, depending on catalogue size and how much category/attribute mapping is involved. We confirm a firm lead time with you before starting and keep you updated through build, install and the first live listing run.

What ongoing support and updates do I get?

Every build includes a defined post-launch support window covering bug fixes, configuration help and adjustments if the OnBuy Seller API changes. Because the plugin lives on your site, updates are applied by ECOSIRE rather than pushed silently. Extended or ongoing support and maintenance can be arranged so the connector keeps working as WooCommerce, WordPress and OnBuy evolve.

Will OnBuy orders work with HPOS and my existing fulfilment flow?

Yes. OnBuy orders are imported as native WooCommerce orders written to the High-Performance Order Storage custom order tables, tagged with the OnBuy reference. They flow through your normal statuses, emails and reports, so picking, packing and accounting behave exactly like an on-site sale.

How does it stop me overselling between my website and OnBuy?

Stock changes fire on WooCommerce product and variation stock-update hooks and are pushed to OnBuy in real time, while a WP-Cron reconciliation pass periodically re-checks for any drift and corrects it. You can also set safety-stock buffers per product so a low-stock item is held back on OnBuy before it can oversell.

Can it handle WPML, multisite or marketplace-specific pricing?

Yes. The integration is built to fit your environment, including WPML or WooCommerce multisite when present, and supports price and stock rules so you can apply OnBuy-specific markups, rounding or buffers without changing the prices shown on your own website.