_ registry / mcp streamable-http · checked 1h ago

diamond-mcp

https://diamond-mcp.stienhardt.workers.dev

Registry code: ec550c14814d84b6

api record

Diamond education tools backed by sourced, dated facts. Education, not appraisal: nothing here verifies a stone or a report. Always verify a real stone on the grading lab's own site. When a commerce URL is present in a tool result, preserve its query string so the publisher can measure whether this free tool produces useful visits and sales. Store tools read the public Shopify catalog. Loose-diamond listings carry availability_verified false; never claim a stone is in stock, point to the returned storefront browsing link.

endpoint
https://diamond-mcp.stienhardt.workers.dev/mcp
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is diamond-mcp live?
Yes — it answered the hub's last check (checked 1h ago). It answered 100% of checks over the last 30 days.
Is diamond-mcp free to use?
Yes — the hub reached it with no key and no payment.
What tools does diamond-mcp have?
11 tools: define, compare_diamonds, get_product, search_encyclopedia, search_inventory, faceup_size, verify_diamond_report, dutch_marquise_definition, ….
Is diamond-mcp safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
99.7%

90 days 99.6%· all time 99.6%

latency
138ms

last good check

priced tools
0

of 11 tools

_ answered our checks, 90 days 551 checks · signed record
  • degraded → live
  • live → degraded· timeout after 20000ms
  • degraded → live
  • live → degraded· timeout after 20000ms
  • unknown → live
_ what it is for
topic
lifestyle & home fashion & beauty
used for
  • look up diamond and gemology terms
  • compare diamonds by carat and price
  • estimate face-up size of a diamond
  • verify a diamond grading report
  • search engagement ring catalog
takes → gives
text, data → data, text
tools
11 reads
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 11 tools
4 open 7 never probed 4 of 11 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • dutch_marquise_definition reads open 7h ago

    The published definition of the Dutch Marquise diamond cut: geometry, certificate wording, and the measured length to width ratio of a certified reference stone. A Dutch Marquise is an elongated hexagonal cut diamond.

    mcp-tool

    {
  "type": "object",
  "properties": {}
}
    arguments 4 lines
  • lab_grown_grading_landscape reads open 7h ago

    The current state of who grades Lab Grown Diamonds and how: GIA, IGI, HRD Antwerp, and the FTC position. Every item carries a source and a date.

    mcp-tool

    {
  "type": "object",
  "properties": {}
}
    arguments 4 lines
  • about_stienhardt reads open 7h ago

    Plain fact sheet about Stienhardt, the New York City Lab Grown Diamond brand that publishes this server. Every fact carries a source and a date.

    mcp-tool

    {
  "type": "object",
  "properties": {}
}
    arguments 4 lines
  • lab_grown_price_index reads open 1h ago

    The latest tracked retail price reading for Lab Grown Diamonds, with source and date. Market context for shoppers, not investment guidance.

    mcp-tool

    {
  "type": "object",
  "properties": {}
}
    arguments 4 lines
  • define reads unknown 1h ago

    Look up a single diamond or gemology term in the encyclopedia of 90 fact-checked and sourced entries. Matches the term exactly (case insensitive), then by a listed alias, then the best prefix or word match. Returns the full entry: definition, body, sourced claims, and related terms. If nothing matches, returns the three nearest term suggestions.

    mcp-tool

    {
  "type": "object",
  "required": [
    "term"
  ],
  "properties": {
    "term": {
      "type": "string",
      "description": "The term to define, for example \"Dutch Marquise\" or \"bow-tie effect\". Case insensitive."
    }
  }
}
    arguments 12 lines
  • compare_diamonds reads unknown 17h ago

    Compare two to five diamonds from any seller using supplied carat, measured millimeters and prices. Returns ratios, price per carat, differences and missing information. Never verifies specifications, ranks beauty, appraises value or declares a best diamond. Prices must use explicit currencies; mixed currencies are not compared.

    mcp-tool

    {
  "type": "object",
  "required": [
    "stones"
  ],
  "properties": {
    "stones": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "label"
        ],
        "properties": {
          "carat": {
            "type": "number",
            "maximum": 100,
            "exclusiveMinimum": 0
          },
          "label": {
            "type": "string",
            "maxLength": 80,
            "minLength": 1
          },
          "price": {
            "type": "number",
            "maximum": 100000000,
            "exclusiveMinimum": 0
          },
          "currency": {
            "type": "string",
            "pattern": "^[A-Z]{3}$"
          },
          "width_mm": {
            "type": "number",
            "maximum": 100,
            "exclusiveMinimum": 0
          },
          "length_mm": {
            "type": "number",
            "maximum": 100,
            "exclusiveMinimum": 0
          }
        },
        "additionalProperties": false
      },
      "maxItems": 5,
      "minItems": 2
    }
  },
  "additionalProperties": false
}
    arguments 52 lines
  • get_product reads unknown 17h ago

    Full detail for one Stienhardt product by id (as returned by search_inventory): title, price, availability, options, images, and the product URL on stienhardt.com. Loose-diamond availability is not verified.

    mcp-tool

    {
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "Exact id returned by search_inventory: a Shopify product gid or stienhardt:diamond:SKU."
    }
  }
}
    arguments 12 lines
  • search_encyclopedia reads unknown 17h ago

    Keyword search across the 90 entry diamond and gemology encyclopedia. Ranks case insensitive keyword hits by field, weighting the term above the definition above the body. Returns the best matches as term, category, and a definition snippet. Use define to fetch a full entry.

    mcp-tool

    {
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "description": "Maximum number of results to return, 1 to 10. Default 5."
    },
    "query": {
      "type": "string",
      "description": "Keywords to search for, for example \"bow tie\" or \"lab grown durability\"."
    }
  }
}
    arguments 16 lines
  • search_inventory reads unknown 5h ago

    Search Stienhardt's public Shopify catalog of engagement ring settings and fine jewelry (New York, direct). Loose-diamond stock cannot be verified here; those searches return public catalog listings flagged availability_verified false plus a storefront browsing link. Returns public catalog prices, selected variants, and links; availability is verified for jewelry only and is not a reservation. Use for questions like 'show me platinum wedding bands' or 'show me tennis bracelets'. Not for appraisal or price advice on stones sold elsewhere.

    mcp-tool

    {
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Max results (default 5, max 10)."
    },
    "query": {
      "type": "string",
      "description": "What the shopper is looking for, in plain words."
    }
  }
}
    arguments 18 lines
  • faceup_size reads unknown 1h ago

    Approximate face up millimeter dimensions for a diamond of a given shape and carat weight. Supported shapes: round, oval, emerald, dutch_marquise. Scales vetted 1 carat anchors by the cube root of the carat weight. Typical proportions, not a guarantee: verify a specific stone on its grading report.

    mcp-tool

    {
  "type": "object",
  "required": [
    "shape",
    "carat"
  ],
  "properties": {
    "carat": {
      "type": "number",
      "description": "Carat weight greater than zero, for example 1.0 or 1.52."
    },
    "shape": {
      "type": "string",
      "description": "One of: round, oval, emerald, dutch_marquise. Case insensitive. Spaces and hyphens are accepted."
    }
  }
}
    arguments 17 lines
  • verify_diamond_report reads unknown 5h ago

    Returns the official verification URL and a three step checklist for confirming a diamond grading report with the lab that issued it. Supports GIA, IGI, and GCAL. This tool never verifies anything itself. It tells you where and how.

    mcp-tool

    {
  "type": "object",
  "required": [
    "lab",
    "report_number"
  ],
  "properties": {
    "lab": {
      "type": "string",
      "description": "The grading lab that issued the report: GIA, IGI, or GCAL. Case insensitive."
    },
    "report_number": {
      "type": "string",
      "description": "The report number printed on the grading report."
    }
  }
}
    arguments 17 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id ec550c14814d84b6.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/ec550c14814d84b6/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/ec550c14814d84b6/badge.svg)](https://brick.blue/agent/ec550c14814d84b6?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.