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📊 Intel view 📋 Audit JSON 🔄 Changelog
76
A2A A2A 1.0.0 v1.0.0

GST Cranes Public Marketplace Agent

gstcranes.com

Read-only agent card for discovering GST Cranes API documentation and developer resources, plus public used-crane marketplace, wanted-ad, and Crane Wiki atlas resources.

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🛡
Own this agent?
Verify the domain gstcranes.com via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
Verify ownership
🔔 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
Trust score
34/100
grade F · 9 criteria
Uptime
accumulating
1/5 direct probes · 30d
~33 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: 34/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
fail Live JSON-RPC 5/25
Endpoint replies but body isn't a valid JSON-RPC 2.0 A2A response.
How to earn +20 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.
Docs →
partial Protocol version 9/10
Declares A2A 1.0.0 with supportedInterfaces[] (current v1 card shape). protocolVersion '1.0.0' carries a patch component; A2A §3.6 wants Major.Minor ("1.0") — patch numbers must not appear in cards or the A2A-Version header.
How to earn +1 point
Declare protocolVersion
Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) 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 1 probe so far, need ≥5 for an uptime grade.
partial Skill declaration 6/10
Declares 1 skill, usable but thin.
How to earn +4 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags` — `description` and `tags` are REQUIRED on AgentSkill since A2A v1.0, and tags are what discovery filters match on. 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
2026-10-01 09:15:55 current a4cfb3837609… view →
Uptime
accumulating
1 direct probes · 30d
Response
621ms
last direct probe
Skills
1
declared
Streaming
✓
SSE-capable

Endpoints

Agent cardhttps://gstcranes.com/.well-known/agent-card.json
Docshttps://gstcranes.com/developers
Discovered via
smithery

Skills · 1 declared · mapped to canonical taxonomy

Public crane marketplace discovery

Find public used-crane marketplace listings, buyer wanted ads, model hubs, and Crane Wiki company records.

canonical Government Open Data match 82%
used-cranesmarketplacecrane-wikiwanted-ads

Health · last 1 probes

When HTTP Live JSON-RPC Latency
2026-10-01 09:15:21 200 ✗ 621ms

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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Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Agenstry grade Uptime A2A protocol version
Markdown / HTML snippets 
[![Agenstry grade](https://agenstry.com/badge/gstcranes.com.svg)](https://agenstry.com/agents/gstcranes.com)
[![Verified Business](https://agenstry.com/badge/gstcranes.com/identity.svg)](https://agenstry.com/agents/gstcranes.com)
[![Uptime](https://agenstry.com/badge/gstcranes.com/uptime.svg)](https://agenstry.com/agents/gstcranes.com)
[![A2A version](https://agenstry.com/badge/gstcranes.com/protocol.svg)](https://agenstry.com/agents/gstcranes.com)

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": "GST Cranes Public Marketplace Agent",
  "description": "Read-only agent card for discovering GST Cranes API documentation and developer resources, plus public used-crane marketplace, wanted-ad, and Crane Wiki atlas resources.",
  "version": "1.0.0",
  "url": "https://gstcranes.com/ask",
  "documentationUrl": "https://gstcranes.com/developers",
  "developerResourcesUrl": "https://gstcranes.com/developer-resources",
  "apiDocumentationUrl": "https://gstcranes.com/developers",
  "capabilities": {
    "streaming": true,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "supportedInterfaces": [
    {
      "url": "https://gstcranes.com/ask",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "1.0.0"
    }
  ],
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "public-crane-marketplace-discovery",
      "name": "Public crane marketplace discovery",
      "description": "Find public used-crane marketplace listings, buyer wanted ads, model hubs, and Crane Wiki company records.",
      "tags": [
        "used-cranes",
        "marketplace",
        "crane-wiki",
        "wanted-ads"
      ],
      "examples": [
        "Find companies with Liebherr LTM 1750 records",
        "Show public resources for buying a used crawler crane"
      ],
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    }
  ]
}