# Stienhardt (remote · stienhard-stones.myshopify.com)

Stienhardt (NYC): shop live Lab Grown Diamonds, engagement rings, jewelry. Search, cart, checkout.

- Trust score: 80/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `stienhard-stones.myshopify.com`: 80/100 (this document), [markdown](https://verifymcp.io/servers/jacobiusmakes-stienhardt-store/api-ucp-mcp.md), [page](https://verifymcp.io/servers/jacobiusmakes-stienhardt-store/api-ucp-mcp)

## Channel facts

- Endpoint: `https://stienhard-stones.myshopify.com/api/ucp/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Endpoint Security**: 83/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation is enforced on tool calls, but the challenge carries no valid RFC 9728 metadata, so a client cannot discover where to get a token.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 58/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 2280 tokens (~175/item across 13 items; 13 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 63/100
  - Stability observed for 19 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 13 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Stienhardt MCP server?

Stienhardt is a hosted endpoint at https://stienhard-stones.myshopify.com/api/ucp/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http jacobiusmakes-stienhardt-store 'https://stienhard-stones.myshopify.com/api/ucp/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "jacobiusmakes-stienhardt-store": {
      "url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "jacobiusmakes-stienhardt-store": {
      "type": "http",
      "url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.jacobiusmakes-stienhardt-store]
url = "https://stienhard-stones.myshopify.com/api/ucp/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jacobiusmakes-stienhardt-store": {
      "type": "remote",
      "url": "https://stienhard-stones.myshopify.com/api/ucp/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add jacobiusmakes-stienhardt-store --url 'https://stienhard-stones.myshopify.com/api/ucp/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  jacobiusmakes-stienhardt-store:
    url: "https://stienhard-stones.myshopify.com/api/ucp/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "jacobiusmakes-stienhardt-store": {
      "Transport": "http",
      "Url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add jacobiusmakes-stienhardt-store -t streamable-http -u 'https://stienhard-stones.myshopify.com/api/ucp/mcp'
```

### Other

```json
{
  "mcpServers": {
    "jacobiusmakes-stienhardt-store": {
      "type": "http",
      "url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 80, 0)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-19 (score 80, 0)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-18 (score 80, +1)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-17 (score 79, 0)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-16 (score 79, +1)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-15 (score 78, 0)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-14 (score 78, +1)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

### 2026-09-13 (score 77, 0)

- [functional] This server's schema is too large to store in full, so we cannot compare its tools day to day

## MCP tools (13)

### `get_checkout` (~171 tokens)

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": "USD"} is $6.00 and {"amount": 2500,
"currency": "USD"} is $25.00. Convert to major units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `id` (string, required): The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `create_checkout` (~155 tokens)

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, "currency": "USD"} is $6.00 and {"amount": 2500,
"currency": "USD"} is $25.00. Convert to major units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `checkout` (object, required): Checkout properties.
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `update_checkout` (~182 tokens)

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, "currency": "USD"} is $6.00 and {"amount": 2500,
"currency": "USD"} is $25.00. Convert to major units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `checkout` (object, required): Checkout properties.
- `id` (string, required): The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `complete_checkout` (~192 tokens)

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 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 before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `checkout` (object, required): Checkout properties.
- `id` (string, required): The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `cancel_checkout` (~157 tokens)

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 units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `id` (string, required): The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `get_cart` (~155 tokens)

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 units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `id` (string, required): The ID of the cart. Format: 'gid://shopify/Cart/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `create_cart` (~139 tokens)

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 units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `cart` (object, required): Cart properties.
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `update_cart` (~165 tokens)

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 major units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `cart` (object, required): Cart properties.
- `id` (string, required): The ID of the cart. Format: 'gid://shopify/Cart/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `cancel_cart` (~155 tokens)

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 before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `id` (string, required): The ID of the cart. Format: 'gid://shopify/Cart/abc123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `get_order` (~156 tokens)

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 major units before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `id` (string, required): The ID of the order. Format: 'gid://shopify/Order/123'
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `search_catalog` (~226 tokens)

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 paginated, with initial results limited to improve experience.
Use the pagination.cursor from the response to fetch additional pages when users request more results.

Response conforms to the UCP catalog search capability (dev.ucp.shopping.catalog.search).

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 before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `catalog` (object, required): Catalog search parameters.
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `lookup_catalog` (~236 tokens)

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 (gid://shopify/ProductVariant/...): Returns parent product with the exact variant

Results are grouped by product. Each variant includes an inputs array showing
which request ID resolved to it and whether the match was exact or featured.

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 before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).


Maximum 10 IDs per request.

Input parameters:

- `catalog` (object, required): Catalog lookup parameters.
- `meta` (object, required): Metadata for UCP agent profile discovery.

### `get_product` (~191 tokens)

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 variant narrowing and availability signals. Use for product detail page
rendering and purchase decisions.

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 before quoting a price to a buyer
(divide by 100 for two-decimal currencies such as USD and EUR; zero-decimal currencies
such as JPY are already whole units).

Input parameters:

- `catalog` (object, required): Product detail parameters.
- `meta` (object, required): Metadata for UCP agent profile discovery.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/jacobiusmakes-stienhardt-store/api-ucp-mcp#diagnostics

## Score history

- 2026-09-20: 80
- 2026-09-19: 80
- 2026-09-18: 80
- 2026-09-17: 79
- 2026-09-16: 79
- 2026-09-15: 78
- 2026-09-14: 78
- 2026-09-13: 77
- 2026-09-12: 77
- 2026-09-11: 76
- 2026-09-10: 76
- 2026-09-09: 75
- 2026-09-08: 75
- 2026-09-07: 74
- 2026-09-06: 74
- 2026-09-05: 73
- 2026-09-04: 73
- 2026-09-03: 73
- 2026-09-02: 72
- 2026-09-01: 72

## Common questions

### What is the Stienhardt MCP server?

Stienhardt is an MCP server listed in the public MCP registry as io.github.JacobiusMakes/stienhardt-store. Stienhardt (NYC): shop live Lab Grown Diamonds, engagement rings, jewelry. Search, cart, checkout. This page covers its hosted endpoint (https://stienhard-stones.myshopify.com/api/ucp/mcp).

### Is the Stienhardt MCP server safe to use?

Stienhardt scores 80 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Stienhardt MCP server expose?

Stienhardt exposes 13 tools: get_checkout, create_checkout, update_checkout, complete_checkout, cancel_checkout, and 8 more. Their descriptions and schemas cost roughly 2,280 tokens of context every time the server is loaded.

### Does the Stienhardt MCP server require authentication?

Yes. Stienhardt asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.

### Is the Stienhardt MCP server still maintained?

Stienhardt is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://stienhard-stones.myshopify.com/api/ucp/mcp
- Repository: https://github.com/JacobiusMakes/stienhardt-store
- Website: https://stienhardt.com/
- Changelog RSS feed: https://verifymcp.io/servers/jacobiusmakes-stienhardt-store/api-ucp-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/jacobiusmakes-stienhardt-store/api-ucp-mcp.json
- HTML version of this page: https://verifymcp.io/servers/jacobiusmakes-stienhardt-store/api-ucp-mcp