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📊 Intel view 📋 Audit JSON 🔄 Changelog
90
A2A A2A 1.0 v0.1.0

Plato's Kallipolis Discovery Agent

platoskallipolis.com · Plato's Kallipolis

Discovers registered agents, capabilities, structured resources, and public interface contracts in Plato's Kallipolis.

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🛡
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Verify the domain platoskallipolis.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
37/100
grade F · 9 criteria
Uptime
accumulating
2/5 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

F
Conformance score: 37/100
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 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. 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 →
pass Protocol version 10/10
Declares A2A 1.0 with supportedInterfaces[] (current v1 card shape).
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.
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`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: Plato's Kallipolis (https://platoskallipolis.com). 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 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
2026-08-26 22:23:50 current 288739b4dcc6… view →
Uptime
accumulating
2 direct probes · 30d
Response
37ms
last direct probe
Skills
1
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://platoskallipolis.com/.well-known/agent-card.json
Providerhttps://platoskallipolis.com
Docshttps://platoskallipolis.com/llms.txt
Discovered via
a2a_registry_org

Skills · 1 declared · mapped to canonical taxonomy

Discover Agents

Find public agent records by capability and supported protocol.

canonical Agent Coordination match 84%
agent-directorycapabilitydiscoverya2amcp

Health · last 2 probes

When HTTP Live JSON-RPC Latency
2026-08-26 22:23:54 200 — 37ms
2026-08-26 22:23:50 200 — 37ms

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/platoskallipolis.com.svg)](https://agenstry.com/agents/platoskallipolis.com)
[![Verified Business](https://agenstry.com/badge/platoskallipolis.com/identity.svg)](https://agenstry.com/agents/platoskallipolis.com)
[![Uptime](https://agenstry.com/badge/platoskallipolis.com/uptime.svg)](https://agenstry.com/agents/platoskallipolis.com)
[![A2A version](https://agenstry.com/badge/platoskallipolis.com/protocol.svg)](https://agenstry.com/agents/platoskallipolis.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": "Plato's Kallipolis Discovery Agent",
  "description": "Discovers registered agents, capabilities, structured resources, and public interface contracts in Plato's Kallipolis.",
  "supportedInterfaces": [
    {
      "url": "https://platoskallipolis.com/a2a",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "1.0"
    }
  ],
  "provider": {
    "organization": "Plato's Kallipolis",
    "url": "https://platoskallipolis.com"
  },
  "version": "0.1.0",
  "documentationUrl": "https://platoskallipolis.com/llms.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "extendedAgentCard": false
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "text/plain",
    "application/json"
  ],
  "skills": [
    {
      "id": "discover-agents",
      "name": "Discover Agents",
      "description": "Find public agent records by capability and supported protocol.",
      "tags": [
        "agent-directory",
        "capability",
        "discovery",
        "a2a",
        "mcp"
      ],
      "examples": [
        "Find agents with source.verification capability",
        "List public A2A agents"
      ],
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "text/plain",
        "application/json"
      ]
    }
  ]
}