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A 5-Minute Grok Commerce Experiment with a Custom MCP

#ai #webdev #tutorial

Updated September 8, 2026: Grok now has a dedicated public-search endpoint. This guide replaces the earlier Grok URL and keeps account quote/draft access out of the default setup.

I'm building WebAZ. This experiment is a small way to try its product discovery: ask Grok to find an actual listing, then check whether the result gives you enough information to compare it responsibly. Searching is not buying.

Before You Start

  • Use a Grok account with access to Connectors.
  • Open https://grok.com/connectors. The current web interface groups Connectors under Plugins.
  • The public-search experiment does not require a WebAZ account.
  • Never paste a password, API key, wallet seed phrase or other secret into a connector URL or chat.
  • This is a manual Custom MCP setup, not a claim of an official catalog listing or xAI endorsement.

Experiment A: Public Product Search

Add the Connector

Following xAI's custom MCP instructions:

  1. Open Connectors.
  2. Click New Connector, then select Custom.
  3. Name the entry WebAZ Shopping.
  4. Use https://webaz.xyz/mcp/grok-search-v1.
  5. Complete the connector setup. This public endpoint does not require WebAZ OAuth.

Use the Grok-specific URL above, not the ChatGPT shopping endpoint. It exposes one read-only tool, webaz_search. If you already have a working WebAZ search entry, check its URL before adding another.

Run the Test

Use WebAZ to find wall-hanging facial tissues for delivery to Singapore. Show pack count, sheet size and listed price. Mark missing shipping costs or unclear variants. Do not place an order.

What to Check

  • The answer should be based on a WebAZ search result, not invented products.
  • Check the actual listing and selected option. A starting price does not necessarily buy the pack size named in a product title.
  • Compare pack count, sheet size, handling time, delivery estimate and return terms only where supplied.
  • Missing shipping fees, taxes or a delivered total should remain unknown.
  • Grok controls how results are displayed. Do not expect the same interactive cards as another AI client.
  • No matching result is a valid outcome. It is not evidence that an unavailable product can be purchased.

Success here means finding a checkable product result, not proving it is the cheapest option or guaranteeing delivery.

What This Does Not Do

  • No WebAZ account access
  • No order creation
  • No inventory reservation
  • No payment
  • No private account data

Account Quote or Draft: Not Part of This Experiment

The separate /mcp/grok-v1 account connector is a compatibility preview, not the recommended default. Do not add it for ordinary product search. An OAuth challenge demonstrates an authorization boundary; it does not prove that quote/draft interactions work reliably in Grok.

For the current endpoint status, see WebAZ's remote MCP guide.

Business and Enterprise

A team administrator must provision a connector before members can use it. Follow xAI's connector management instructions. This public-search experiment does not require access to private WebAZ account data.

Verification Note

On September 8, we added a new anonymous connector in an existing Grok account using /mcp/grok-search-v1. Its details showed only webaz_search. In a fresh conversation, Grok used that connector and returned five tissue listings for Singapore; the visible tool result also reported five matching products. The English answer flagged missing shipping costs and unclear variants.

A separate Chinese-language test returned no matches for the query 挂式抽纸. In another fresh conversation, Chinese instructions specifying the English search phrase wall-hanging facial tissues returned five listings. This suggests a keyword/language matching limitation in this example, not proof that products cannot ship to Singapore. The Chinese answer flagged missing freight but placed title pack counts beside starting prices without adequately explaining variant uncertainty. Do not treat that pairing as a verified SKU price. Check the selected option and delivered total on the listing.

These are individual setup/search observations, not a reliability benchmark, a brand-new Grok-account onboarding test, or a purchase. We did not request a quote, create an order, or pay. Prices and availability can change.

Sources

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