Connect BigCommerce to Google Shopping — the right way

BigCommerce’s native Google integration gets you listed. Trajekt connects via the BigCommerce Catalog API (V3), accessing your full product data including custom attributes, correct variant handling, and a daily-refreshed Merchant Center feed with optimised titles and custom labels.

Connect BigCommerce free Full BigCommerce guide

What Trajekt adds over native integration

✓ Full custom attribute access (GTINs, brand, material)

✓ Correct variant grouping via item_group_id

✓ No-code title optimisation rules

✓ Custom labels for bid management

✓ ChatGPT Shopping from same connection

✓ All channels from one integration

Connect BigCommerce to Google Shopping in 5 steps

Generate BigCommerce API credentials

In BigCommerce Admin: Settings → API → API Accounts → Create API Account (V2/V3). Set OAuth scopes to: Products — Read-Only. Copy the Client ID, Client Secret, and Access Token. Note your store hash from the store URL (the alphanumeric string after /stores/).

Connect your store in Trajekt

In Trajekt: Add Store → BigCommerce. Enter your store URL and API credentials. Trajekt pulls your full catalogue including all products, variants, custom attributes, and images via the BigCommerce Catalog API (V3).

Map custom attributes and set rules

In Trajekt’s rules engine, map your GTIN/barcode attribute to gtin, your brand to brand, and configure title rules to prepend the brand and append variant attributes. Assign custom labels by price range or category.

Copy your Trajekt feed URL

Trajekt generates a stable feed URL for your Google Shopping output. This URL always returns your latest product data. Copy it from your Trajekt dashboard.

Add as Scheduled Fetch in Merchant Center

In Google Merchant Center Next: Products → Data sources → Add data source → Scheduled fetch. Paste your Trajekt feed URL and set to daily. Your BigCommerce catalogue updates in Merchant Center automatically.

Common BigCommerce gotcha: BigCommerce's native Google Shopping integration (via Google Channel app) works but has limited custom field access and no title optimisation rules. Trajekt via the Catalog API accesses your full product data including all custom fields, all variant options, and the native UPC field — which the Google Channel app often misses.

How BigCommerce product variants map to Google Shopping

BigCommerce product variants (called SKUs in their API) become individual feed rows. Each variant has its own id (the variant SKU or ID), specific option values (colour, size), and a shared item_group_id matching the parent product ID. BigCommerce's Catalog API V3 provides clean variant data that maps directly to Google Shopping's variant structure.

Feed output — variant row example

id: "bigcommerce_variant_67890"

item_group_id: "bigcommerce_parent_12345"

title: "Brand Product Name — Navy — UK 12"

color: "Navy" size: "UK 12"

price: "49.99 GBP" availability: "in_stock"

Frequently asked questions

Yes. Trajekt uses BigCommerce's V3 Catalog API with API credentials you generate in BigCommerce Admin. No app installation required. This gives Trajekt access to your full product data including all custom fields and variant options.

BigCommerce offers a Google Channel app that connects to Google Shopping. It works for basic setups but lacks title optimisation rules, custom label management, and access to all custom product fields. Trajekt via the Catalog API provides a more complete feed with optimisation capabilities.

BigCommerce product variants (SKUs) become individual feed rows in Trajekt's output. Each variant row has a unique product id, its specific option values (colour, size, etc.), and a shared item_group_id matching the parent product. This correctly signals to Google Shopping that these are the same product in different configurations.

Yes. BigCommerce has native UPC and MPN fields at both the product level and the variant (SKU) level. Trajekt maps these directly to the gtin and mpn feed attributes — no custom field mapping required if you've populated BigCommerce's standard identifier fields.

Yes. Trajekt supports multiple BigCommerce store connections from one account. Each store has its own feed configuration and rules. Trajekt's Growth plan (£49/month) covers 3 stores — suitable for merchants with separate regional stores or brand sub-stores.

In BigCommerce Admin: Settings → API → API Accounts → Create API Account (V2/V3). Set Product scope to Read-Only. BigCommerce will display your Client ID, Client Secret, and Access Token once — copy all three and paste them into Trajekt's BigCommerce connection form.