Stienhardt
REMOTE · STIENHARD-STONES.MYSHOPIFY.COM · SCANNED SEP 20
Stienhardt (NYC): shop live Lab Grown Diamonds, engagement rings, jewelry. Search, cart, checkout.
Available components
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. How we score → Why this is hard to score →
Endpoint Security83
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- 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. See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability58
- AI-judged instruction clarity (good).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management63
- Stability observed for 19 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 13 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
remote · stienhard-stones.myshopify.com
claude mcp add --transport http jacobiusmakes-stienhardt-store 'https://stienhard-stones.myshopify.com/api/ucp/mcp'
{
"mcpServers": {
"jacobiusmakes-stienhardt-store": {
"url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
}
}
} {
"servers": {
"jacobiusmakes-stienhardt-store": {
"type": "http",
"url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
}
}
} [mcp_servers.jacobiusmakes-stienhardt-store] url = "https://stienhard-stones.myshopify.com/api/ucp/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"jacobiusmakes-stienhardt-store": {
"type": "remote",
"url": "https://stienhard-stones.myshopify.com/api/ucp/mcp",
"enabled": true
}
}
} openclaw mcp add jacobiusmakes-stienhardt-store --url 'https://stienhard-stones.myshopify.com/api/ucp/mcp' --transport streamable-http
mcp_servers:
jacobiusmakes-stienhardt-store:
url: "https://stienhard-stones.myshopify.com/api/ucp/mcp" {
"McpServers": {
"jacobiusmakes-stienhardt-store": {
"Transport": "http",
"Url": "https://stienhard-stones.myshopify.com/api/ucp/mcp"
}
}
} assistant mcp add jacobiusmakes-stienhardt-store -t streamable-http -u 'https://stienhard-stones.myshopify.com/api/ucp/mcp'
{
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 0
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 19 Sept 26 0
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 18 Sept 26 +1
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 17 Sept 26 0
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 16 Sept 26 +1
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 15 Sept 26 0
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 14 Sept 26 +1
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
- 13 Sept 26 0
- This server's schema is too large to store in full, so we cannot compare its tools day to day functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Probed https://stienhard-stones.myshopify.com/api/ucp/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.myshopify.com | CN=YE1,O=Let's Encrypt,C=US | 5 Sept 2026 | 4 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 6cd33661c4a4d666442efea96a9477b6423 |
| SANs: *.myshopify.com, myshopify.com | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of stienhard-stones.myshopify.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| myshopify.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Challenged, unverified
The endpoint asked for a token, but we could not retrieve and validate the RFC 9728 metadata that tells a client how to obtain one.
| Result | Challenged, unverified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
| Header | Value |
|---|---|
| content-security-policy | block-all-mixed-content; frame-ancestors 'none'; upgrade-insecure-requests; |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
Protected resource metadata
| Retrieved | No |
|---|---|
| Problem | no_resource_metadata |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://stienhard-stones.myshopify.com/api/ucp/mcp | Verified | 200 | |
| http (plaintext) | http://stienhard-stones.myshopify.com/api/ucp/mcp | HTTPS enforced | 301 | https://stienhard-stones.myshopify.com/api/ucp/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
cancel_cart ~155
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).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The ID of the cart. Format: 'gid://shopify/Cart/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
cancel_checkout ~157
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).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
complete_checkout ~192
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).
| Name | Type | Req | Description |
|---|---|---|---|
| checkout | object | yes | Checkout properties. |
| id | string | yes | The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
create_cart ~139
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).
| Name | Type | Req | Description |
|---|---|---|---|
| cart | object | yes | Cart properties. |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
create_checkout ~155
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).
| Name | Type | Req | Description |
|---|---|---|---|
| checkout | object | yes | Checkout properties. |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
get_cart ~155
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).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The ID of the cart. Format: 'gid://shopify/Cart/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
get_checkout ~171
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).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
get_order ~156
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).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The ID of the order. Format: 'gid://shopify/Order/123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
get_product ~191
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).
| Name | Type | Req | Description |
|---|---|---|---|
| catalog | object | yes | Product detail parameters. |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
lookup_catalog ~236
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.
| Name | Type | Req | Description |
|---|---|---|---|
| catalog | object | yes | Catalog lookup parameters. |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
search_catalog ~226
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).
| Name | Type | Req | Description |
|---|---|---|---|
| catalog | object | yes | Catalog search parameters. |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
update_cart ~165
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).
| Name | Type | Req | Description |
|---|---|---|---|
| cart | object | yes | Cart properties. |
| id | string | yes | The ID of the cart. Format: 'gid://shopify/Cart/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
update_checkout ~182
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).
| Name | Type | Req | Description |
|---|---|---|---|
| checkout | object | yes | Checkout properties. |
| id | string | yes | The ID of the checkout to update. Format: 'gid://shopify/Checkout/abc123' |
| meta | object | yes | Metadata for UCP agent profile discovery. |
No output schema declared.
No examples provided.
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.