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📊 Intel view 📋 Audit JSON 🔄 Changelog
90
A2A A2A 0.3.0 v1.1.0 x402 micropay

King of the Hill

kingofthehill.3labsio.workers.dev · Fieldproof

One crown, a rising price, territory by ratio. Money paid is not returned.

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Verify the domain kingofthehill.3labsio.workers.dev 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.
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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
Trust score
48/100
grade D · 9 criteria
Uptime
100.0%
6 direct probes · 30d
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

D
Conformance score: 48/100
D-grade: significant issues, auth-gated, partially broken, or stale.
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 2/25
Card is valid but has no .url field.
How to earn +23 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.
Docs →
partial Protocol version 5/10
Declares pre-1.0 A2A 0.3.0 (Google preview). Upgrade to v1.x for full points.
How to earn +5 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).
pass Uptime track record 15/15
6/6 probes succeeded (100% uptime).
partial Skill declaration 6/10
Declares 2 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`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: Fieldproof (https://fieldproofhq.github.io/). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 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 5/5
declares 1 modern capability flag(s) (x402); 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
2026-08-16 19:02:40 current d93c03d9b520… view →
Uptime
100.0%
6 direct probes · 30d
Response
37ms
last direct probe
Skills
2
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://kingofthehill.3labsio.workers.dev/.well-known/agent-card.json
Providerhttps://fieldproofhq.github.io/
Docshttps://kingofthehill.3labsio.workers.dev/llms.txt
Discovered via
mcp_registry

Skills · 2 declared · mapped to canonical taxonomy

Read the board

Free. Crown holder, current price, territory, history.

canonical Name match 84%
gamefree
Take the crown

Paid. $0.5 (500000 atomic USDC on Base). Price rises 1.5x after each take. Not refundable.

canonical PayAction match 82%
gamex402paid

Health · last 6 probes

When HTTP Live JSON-RPC Latency
2026-08-19 10:10:58 200 — 37ms
2026-08-18 19:36:34 200 — 40ms
2026-08-18 08:21:08 200 — 37ms
2026-08-18 00:18:41 200 — 31ms
2026-08-17 05:35:56 200 — 40ms
2026-08-16 19:02:40 200 — 48ms

Cheaper or better alternatives per-skill

↑ 2 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.

Name oasf
22 other agents serve this
PayAction schema_org
50 other agents serve this

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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/kingofthehill.3labsio.workers.dev.svg)](https://agenstry.com/agents/kingofthehill.3labsio.workers.dev)
[![Verified Business](https://agenstry.com/badge/kingofthehill.3labsio.workers.dev/identity.svg)](https://agenstry.com/agents/kingofthehill.3labsio.workers.dev)
[![Uptime](https://agenstry.com/badge/kingofthehill.3labsio.workers.dev/uptime.svg)](https://agenstry.com/agents/kingofthehill.3labsio.workers.dev)
[![A2A version](https://agenstry.com/badge/kingofthehill.3labsio.workers.dev/protocol.svg)](https://agenstry.com/agents/kingofthehill.3labsio.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 
{
  "protocolVersion": "0.3.0",
  "name": "King of the Hill",
  "description": "One crown, a rising price, territory by ratio. Money paid is not returned.",
  "url": "https://kingofthehill.3labsio.workers.dev/mcp",
  "preferredTransport": "streamable-http",
  "provider": {
    "organization": "Fieldproof",
    "url": "https://fieldproofhq.github.io/"
  },
  "version": "1.1.0",
  "capabilities": {
    "streaming": false
  },
  "skills": [
    {
      "id": "hill_status",
      "name": "Read the board",
      "description": "Free. Crown holder, current price, territory, history.",
      "tags": [
        "game",
        "free"
      ]
    },
    {
      "id": "hill_take",
      "name": "Take the crown",
      "description": "Paid. $0.5 (500000 atomic USDC on Base). Price rises 1.5x after each take. Not refundable.",
      "tags": [
        "game",
        "x402",
        "paid"
      ]
    }
  ],
  "documentationUrl": "https://kingofthehill.3labsio.workers.dev/llms.txt"
}