Crystal Suppliers MCP
REMOTE · KTCRYSTALS.COM · 2 COMPONENTS
Search verified crystal bracelets and source beads, accessories, and raw materials.
Available components
Last scanned (17 hours ago)
Scores higher than 84% of remote servers
Reachable. Last reached 4 Nov 2026.
Category E-commerce
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 Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- 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 Usability56
- AI-judged instruction clarity (fair).Partial
- Tool/resource definitions use about 586 tokens (~97/item across 6 items; 6 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management97
- Stability observed for 29 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage71
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 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
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.
- 4 Nov 26 −1
- Stability: pass → 0.97 functional
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Aug 26 0
- Stability: 0.97 → pass security
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 12 Aug 26 0
- Schema quality: unverified → fair ▲ functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → 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 4 Nov 2026 · Probed https://ktcrystals.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=ktcrystals.com | CN=YR2,O=Let's Encrypt,C=US | 3 Nov 2026 | 1 Feb 2027 | RSA 2048 | SHA256-RSA | 5b4d3ef03f0ea1c1f75b645346bc2a97d6d |
| SANs: ktcrystals.com | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of ktcrystals.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| ktcrystals.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://ktcrystals.com/mcp | Verified | 200 | |
| http (plaintext) | http://ktcrystals.com/mcp | HTTPS enforced | 308 | https://ktcrystals.com/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 →
crystal_build_procurement_shortlist Build Crystal Procurement Shortlist ~125
Build a deterministic shortlist across requested crystal categories. Verified products are limited to catalog bracelets; other categories remain clearly separated advisory items.
| Name | Type | Req | Description |
|---|---|---|---|
| categories | array | yes | – |
| channel | string | – | – |
| colors | array | – | – |
| contentAssets | array | – | – |
| cursor | string | – | – |
| destination | string | – | – |
| limit | integer | – | – |
| materials | array | – | – |
| packaging | array | – | – |
| targetQuantity | string | – | – |
| targetTimeline | string | – | – |
| useCases | array | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| advisoryItems | array | yes | – |
| coverage | string | yes | – |
| hasMore | boolean | yes | – |
| nextCursor | – | yes | – |
| recommendedInquiryFields | array | yes | – |
| sourceUrls | array | yes | – |
| totalCount | integer | yes | – |
| verifiedProducts | array | yes | – |
| warnings | array | yes | – |
No examples provided.
crystal_get_product Get Crystal Product ~55
Get one verified bracelet by exact SKU or slug, including materials, image, source URL, related SKUs, and explicit manual-confirmation status for commercial terms.
| Name | Type | Req | Description |
|---|---|---|---|
| sku | string | – | – |
| slug | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| coverage | string | yes | – |
| product | object | yes | – |
| relatedProducts | array | yes | – |
| sourceUrls | array | yes | – |
| warnings | array | yes | – |
No examples provided.
crystal_get_sourcing_guidance Get Crystal Sourcing Guidance ~88
Get source-linked procurement checks for bracelets, loose beads, accessories, or raw materials. Adjacent categories are advisory only and never return invented inventory or SKUs.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | yes | – |
| channel | string | – | – |
| contentAssets | array | – | – |
| destination | string | – | – |
| packaging | array | – | – |
| proofRequirements | array | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | yes | – |
| checklist | array | yes | – |
| comparisonCriteria | array | yes | – |
| coverage | string | yes | – |
| requiresManualConfirmation | array | yes | – |
| shortAnswer | string | yes | – |
| sourceUrls | array | yes | – |
| warnings | array | yes | – |
No examples provided.
crystal_list_materials List Bracelet Materials ~60
List normalized materials and real SKU counts from the current verified bracelet catalog. Counts do not claim coverage for loose beads, components, or raw crystals.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | string | – | – |
| limit | integer | – | – |
| query | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| coverage | string | yes | – |
| hasMore | boolean | yes | – |
| materials | array | yes | – |
| nextCursor | – | yes | – |
| sourceUrls | array | yes | – |
| totalCount | integer | yes | – |
| warnings | array | yes | – |
No examples provided.
crystal_prepare_inquiry Prepare Crystal Wholesale Inquiry ~147
Validate any supplied bracelet SKUs and draft an English wholesale inquiry. This read-only tool never sends, stores, or submits buyer data and never invents price, MOQ, stock, lead time, or certificates.
| Name | Type | Req | Description |
|---|---|---|---|
| channel | string | – | – |
| company | string | – | – |
| contentAssets | array | – | – |
| country | string | – | – |
| string | – | – | |
| materials | array | – | – |
| name | string | – | – |
| packaging | string | – | – |
| proofRequirements | array | – | – |
| quantity | string | – | – |
| requirements | string | – | – |
| skus | array | – | – |
| targetTimeline | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | yes | – |
| classification | string | yes | – |
| coverage | string | yes | – |
| draftOnly | boolean | yes | – |
| missingFields | array | yes | – |
| sourceUrls | array | yes | – |
| subject | string | yes | – |
| submissionTarget | string | yes | – |
| validSkus | array | yes | – |
| warnings | array | yes | – |
No examples provided.
crystal_search_products Search Crystal Products ~111
Search the verified 104-SKU bracelet catalog by SKU, name, material, or theme. Beads, accessories, and raw materials return advisory-only coverage with no fabricated SKUs. Commercial terms always require manual confirmation.
| Name | Type | Req | Description |
|---|---|---|---|
| benefitTags | array | – | – |
| category | string | – | – |
| channel | string | – | – |
| cursor | string | – | – |
| limit | integer | – | – |
| materials | array | – | – |
| query | string | – | – |
| useCases | array | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| coverage | string | yes | – |
| hasMore | boolean | yes | – |
| nextCursor | – | yes | – |
| products | array | yes | – |
| sourceUrls | array | yes | – |
| totalCount | integer | yes | – |
| warnings | array | yes | – |
No examples provided.
How do I install the Crystal Suppliers MCP server?
Crystal Suppliers MCP is a hosted endpoint at https://ktcrystals.com/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 · ktcrystals.com
claude mcp add --transport http ziyuant222-crystal-suppliers-mcp 'https://ktcrystals.com/mcp'
What is the Crystal Suppliers MCP server?
Crystal Suppliers MCP is listed in the public MCP registry as io.github.ziyuant222/crystal-suppliers-mcp. Search verified crystal bracelets and source beads, accessories, and raw materials. This page covers its hosted endpoint (https://ktcrystals.com/mcp).
Is the Crystal Suppliers MCP server safe to use?
Crystal Suppliers MCP scores 81 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 Crystal Suppliers MCP server expose?
Crystal Suppliers MCP exposes 6 tools: crystal_search_products, crystal_get_product, crystal_list_materials, crystal_get_sourcing_guidance, crystal_build_procurement_shortlist, crystal_prepare_inquiry. Their descriptions and schemas cost roughly 586 tokens of context every time the server is loaded.
Does the Crystal Suppliers MCP server require authentication?
No. We connected to Crystal Suppliers MCP without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Crystal Suppliers MCP server still maintained?
Crystal Suppliers MCP is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.