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YomaChichi MCP server

Which MCP servers are YomaChichi's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-31

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Whose server it is
  • Registry namecom.yomachichi/shopverified in the MCP registry

The registry name sits under yomachichi.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-31
  • Stateanswerschecked 2026-10-31
  • Tools14
  • Server calls itselfuniversal-commerce
  • Server version0.1.0
  • Protocol version2025-06-18

On 2026-10-31 the server answered initialize and tools/list without a sign-in. First answer in 279 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 3 of the 7 days it takes to judge reliability.

Once connected

  • create_checkout, update_checkout, cancel_checkout, create_cart, update_cart change data without a sign-in: anyone with the address can call them.
  • Its definitions take about 15683 tokens of context: enable only the tools a task needs.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 3, the first on 2026-10-31
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer185 ms
  • Space in an agent's context≈ 15,683 tokensthe definitions of all its tools (14), which an agent carries on every turn
  • Tool definitionsB · 82 of 100
  • Typed results14 of 14 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 14
  • Not saying whether it only reads or can destroy: 14 of 14

What an agent can do with it

  • cannot · preview a pet or person portrait from one photo before buying
  • not sure · put a portrait onto a mug, canvas or magnet
  • not sure · order a memorial portrait for a pet who has passed

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

  • Tools that change data, on a server that answers without a sign-in: create_checkout, update_checkout, cancel_checkout, create_cart, update_cart

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers14 tools · read 2026-10-31
  • get_checkout

    Returns details about the checkout, including line items, totals, and any applicable discounts or taxes. Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency"…

  • create_checkout

    Creates a checkout. Returns checkout details, including line items, totals, and any applicable discounts or taxes. Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600…

  • update_checkout

    Updates a checkout. Returns checkout details, including line items, totals, and any applicable discounts or taxes. Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600…

  • complete_checkout

    Completes a checkout and returns the checkout result. Returns details about the completed checkout, including order ID, Thank You Page URL, or any errors encountered. Prices in the response are integers in the currency's ISO 4217 minor…

  • cancel_checkout

    Cancels a checkout. Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency": "USD"} is $6.00 and {"amount": 2500, "currency": "USD"} is $25.00. Convert to major…

  • get_cart

    Get the cart contents Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency": "USD"} is $6.00 and {"amount": 2500, "currency": "USD"} is $25.00. Convert to major…

  • create_cart

    Creates a new cart Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency": "USD"} is $6.00 and {"amount": 2500, "currency": "USD"} is $25.00. Convert to major…

  • update_cart

    Perform updates to a cart. Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency": "USD"} is $6.00 and {"amount": 2500, "currency": "USD"} is $25.00. Convert to…

  • cancel_cart

    Cancels a cart. Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency": "USD"} is $6.00 and {"amount": 2500, "currency": "USD"} is $25.00. Convert to major units…

  • get_order

    Get the details of an order Prices in the response are integers in the currency's ISO 4217 minor units, paired with a currency code: {"amount": 600, "currency": "USD"} is $6.00 and {"amount": 2500, "currency": "USD"} is $25.00. Convert to…

  • ask_business

    Ask a question about this store, such as what it sells, its policies, or its services.

  • search_catalog

    Search for products from the online store, hosted on Shopify. This tool can be used to search for products using natural language queries, specific filter criteria, or both. At least one of query or filters must be provided. Results are…

  • lookup_catalog

    Look up multiple products or variants by identifier. Use this tool to resolve multiple product/variant IDs in a single request. Supports: - Product IDs (gid://shopify/Product/...): Returns product with match: "featured" - Variant IDs…

  • get_product

    Retrieve complete product detail by identifier. Returns a singular product with a relevant set of variants, exact pricing, and real-time availability. Supports interactive option selection via selected and preferences parameters for…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "shop": {
      "type": "http",
      "url": "https://yomachichi.com/api/ucp/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http yomachichi https://yomachichi.com/api/ucp/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://yomachichi.com/api/ucp/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.