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📊 Intel view 📋 Audit JSON 🔄 Changelog
87
A2A live JSON-RPC v0.1.1

Stienhardt Diamond Shopping Agent

stienhardt-business-mcp.stienhardt.workers.dev

Search current certified Lab Grown Diamond and jewelry inventory, retrieve product details, and get canonical Stienhardt business information.

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🔔 Watch this agent. Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch
1 thing in this card we could not use
Everything else was indexed. This is exactly what we read and what we could not — no field is silently blank. Fix the card at https://stienhardt-business-mcp.stienhardt.workers.dev/.well-known/agent-card.json and the next probe clears this panel.
Field What we saw What we stored
capabilities Input should be a valid dictionary or instance of Capabilities dropped — this field was not indexed
Trust score
38/100
grade F · 9 criteria
Uptime
accumulating
2/5 direct probes · 30d
~23 ms response
Observed inflow · 30d
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
1 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

F
Conformance score: 38/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾ click to collapse breakdown ▴
partial Valid AgentCard 9/10
AgentCard did not read cleanly: 1 field we could not read. Scored on what we could read, not on a card that arrived as published — the card findings name every affected field and what we did with it.
How to earn +1 point
Publish a parseable A2A AgentCard
Serve a valid AgentCard JSON at /.well-known/agent-card.json. The A2A 1.0 schema is the reference; we accept the v0.x backwards-compatible variant too.
Docs →
pass Live JSON-RPC 25/25
Endpoint responds to a negotiated A2A SendMessage probe (answers in ~23 ms).
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 2 probes so far, need ≥5 for an uptime grade.
fail Skill declaration 0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
fail Verified Identity 0/10
No provider organisation declared. Anonymous agent.
How to earn +10 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass Freshness + modern flags 4/5
seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

1 snapshot Every change to agent-card.json
Captured Hash
2026-09-11 18:18:07 current 1e4de7890bfa… view →
Uptime
accumulating
2 direct probes · 30d
Response
78ms
last direct probe
Skills
0
declared
Streaming
SSE-capable

Try it

Send a message to this agent live. Your prompt is proxied through Agenstry.

calling agent…

Skills · 1 declared · mapped to canonical taxonomy

Stienhardt Diamond Shopping Agent

Search current certified Lab Grown Diamond and jewelry inventory, retrieve product details, and get canonical Stienhardt business information.

canonical Academic Paper Search match 79%

Health · last 2 probes

When HTTP Live JSON-RPC Latency
2026-09-11 18:18:07 200 78ms
2026-09-11 18:18:02 200 27ms

Cheaper or better alternatives per-skill

↑ 1 higher quality

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

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agent-business-lab-seller-c.dfly90724.workers.dev · q 0%
Agent-Business-Lab-Seller-B
Deterministic full GEO audit for a public HTTP(S) URL.
agent-business-lab-seller-b.dfly90724.workers.dev · q 0%
Agent-Business-Lab-Seller-A
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Trusteed Agent
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Embed your Agenstry badge

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Agenstry grade Uptime
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/stienhardt-business-mcp.stienhardt.workers.dev.svg)](https://agenstry.com/agents/stienhardt-business-mcp.stienhardt.workers.dev)
[![Verified Business](https://agenstry.com/badge/stienhardt-business-mcp.stienhardt.workers.dev/identity.svg)](https://agenstry.com/agents/stienhardt-business-mcp.stienhardt.workers.dev)
[![Uptime](https://agenstry.com/badge/stienhardt-business-mcp.stienhardt.workers.dev/uptime.svg)](https://agenstry.com/agents/stienhardt-business-mcp.stienhardt.workers.dev)
[![A2A version](https://agenstry.com/badge/stienhardt-business-mcp.stienhardt.workers.dev/protocol.svg)](https://agenstry.com/agents/stienhardt-business-mcp.stienhardt.workers.dev)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "name": "Stienhardt Diamond Shopping Agent",
  "description": "Search current certified Lab Grown Diamond and jewelry inventory, retrieve product details, and get canonical Stienhardt business information.",
  "url": "https://stienhardt-business-mcp.stienhardt.workers.dev/a2a/mcp",
  "version": "0.1.1",
  "capabilities": [
    {
      "name": "get_info",
      "description": "Return canonical identity, contact, website, and social-profile information for Stienhardt.",
      "input_schema": {
        "type": "object",
        "properties": {},
        "additionalProperties": false
      },
      "output_schema": {
        "type": "object",
        "additionalProperties": true
      }
    },
    {
      "name": "get_services",
      "description": "Return the business-maintained catalog of diamonds, engagement rings, wedding bands, fine jewelry, and educational guidance. Optionally filter by category.",
      "input_schema": {
        "type": "object",
        "properties": {
          "category": {
            "type": "string",
            "description": "Optional category filter, such as diamonds, rings, jewelry, or education."
          }
        },
        "additionalProperties": false
      },
      "output_schema": {
        "type": "object",
        "properties": {
          "services": {
            "type": "array",
            "items": {
              "type": "object",
              "additionalProperties": true
            }
          },
          "count": {
            "type": "integer"
          }
        },
        "required": [
          "services"
        ],
        "additionalProperties": true
      }
    },
    {
      "name": "get_location",
      "description": "Return Stienhardt's New York City base and online service coverage. Optionally filter by market.",
      "input_schema": {
        "type": "object",
        "properties": {
          "market": {
            "type": "string",
            "description": "Optional city or market filter."
          }
        },
        "additionalProperties": false
      },
      "output_schema": {
        "type": "object",
        "additionalProperties": true
      }
    },
    {
      "name": "get_products",
      "description": "Search Stienhardt's public catalog of certified Lab Grown Diamonds, engagement ring settings, wedding bands, and fine jewelry. Returns current listing prices, images, and attributable product links. Jewelry results carry a current availability check; loose-diamond listings are flagged availability_verified false and link to the storefront for stock.",
      "input_schema": {
        "type": "object",
        "properties": {
          "query": {
            "type": "string",
            "description": "What the shopper wants, in plain words."
          },
          "limit": {
            "type": "integer",
            "minimum": 1,
            "maximum": 10,
            "description": "Maximum results. Default 5."
          }
        },
        "required": [
          "query"
        ],
        "additionalProperties": false
      },
      "output_schema": {
        "type": "object",
        "additionalProperties": true
      }
    },
    {
      "name": "get_product_summary",
      "description": "Return current detail for one Stienhardt product using an id returned by get_products.",
      "input_schema": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "description": "Product id returned by get_products."
          }
        },
        "required": [
          "id"
        ],
        "additionalProperties": false
      },
      "output_schema": {
        "type": "object",
        "additionalProperties": true
      }
    }
  ],
  "authentication": {
    "type": "none"
  }
}