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Google Merchant Center, through one API

Read the products a merchant keeps in Merchant Center. Prices can’t be written here: Merchant Center takes them from the store or the feed.

Merchant API v1

Start for free Read the Merchant Center guide

At a glance

Connects with
Google sign-in
Merchant
Consents in 2-3 clicks
Access
Renewed by Zikkio on every call
Reads
Products, without variants
Writes
None
Inventory
In stock or out of stock

What you can read and write

Merchant Center is read-only, and the table says so.

Data What you get Access
Catalog What you get: Products, without categories. Access: Read
Variants What you get: Not available: every product comes in as a simple product. Access: Not available
Prices What you get: Merchant Center takes prices from the store or the feed. Access: Not available
Inventory What you get: In stock or out of stock only. Access: Read

How a store connects

The merchant signs in with Google once. Zikkio renews the access on every call.

  1. Your product creates a connect session for Google Merchant Center
  2. The merchant signs in with Google
  3. They grant access to Merchant Center
  4. They pick the Merchant Center account to read

Start the connection from your product

POST /v1/connect/sessions 
curl -X POST https://api.zikkio.com/v1/connect/sessions \
  -H "Authorization: Bearer zk_test_••••" \
  -d '{ "platform": "google" }'
201 Created 
{ "connect_url": "https://connect.zikkio.com/s/ses_3kd9" }

What Zikkio handles on Merchant Center

The platform details your integration does not have to deal with.

Merchant API

The Content API for Shopping was retired on 18 August 2026. Zikkio already reads through the Merchant API.

Access that stays alive

A Google refresh token unused for six months stops working. Zikkio renews it on a schedule.

Clear price write errors

A price write on Merchant Center returns a stable "not supported" error, never a crash.

Merchant Center questions

Before you connect the first Merchant Center account.

Why can’t I write prices on Merchant Center?
Merchant Center takes prices from the store or the feed. Prices can change only on products uploaded through the API, and Zikkio adds that when a customer needs it.
Does my Google client need verification?
If you connect through your own Google client, Google has to verify it for the content scope. Until then it works for 100 new users, and refresh tokens in test mode last 7 days.
Do products come with variants?
No. Merchant Center products come in as simple products.

Connect your first store today.

Free plan with three stores on every platform. No card, and no sales call unless you ask for one.

Start for free
POST /v1/connect/sessions 
curl -X POST https://api.zikkio.com/v1/connect/sessions \
  -H "Authorization: Bearer zk_test_••••" \
  -d '{ "platform": "shopify" }'
201 Created 
{ "connect_url": "https://connect.zikkio.com/s/ses_3kd9" }