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📊 Intel view 📋 Audit JSON 🔄 Changelog
100
A2A live JSON-RPC A2A 0.2.5 v1.0.0

Echo Agent (Demo)

a2a-inspector-liart.vercel.app · A2A Inspector

A bundled demonstration agent shipped with A2A Inspector. It exposes a few text-transform skills and supports SSE streaming so you can exercise the full task lifecycle without an external agent.

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Verify ownership
🔔 Watch this agent for changes. Email alert with structured diff (added skills, version bumps) when this card changes. Enterprise feature. Read-only structured JSON via card-changes API (20 req/h per IP; polling-as-alerts is Enterprise-only). Sign in to subscribe
Trust score
56/100
grade D · 9 criteria
Uptime
accumulating
1/5 probes
~396 ms response
Revenue · 30d
no payment wallet declared
Usage · 7d
0
no recent activity
Card drift · 7d
changed
1 snapshots tracked
Owner
unverified
claim this listing →
D
Conformance score: 56/100
D-grade: significant issues, auth-gated, partially broken, or stale.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Schema-validated A2A AgentCard returned by the well-known endpoint.
pass Live JSON-RPC 25/25
Endpoint responds to message/send with valid JSON-RPC (answers in ~396 ms).
partial Protocol version 2/10
Declares unrecognised version '0.2.5'.
How to earn +8 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to the AgentCard root. Without it, callers can't negotiate v0.x vs v1.0 compatibility.
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.
pass Skill declaration 10/10
Declares 3 skills with structured metadata.
partial Verified Identity 5/10
Provider declared: A2A Inspector (https://a2a-inspector-liart.vercel.app). 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
No securitySchemes declared (common for open agents, not penalised).
⚠ 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 calls Public aggregate · no PII recorded

No calls observed in the last 7 days. 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
2026-06-19 06:25:32 current add422204d52… view →
Uptime
100.0%
1 probes
Response
1232ms
last probe
Skills
3
declared
Streaming
SSE-capable

Try it

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

calling agent…

Skills · 3 declared · mapped to canonical taxonomy

Echo

Repeats your message back verbatim.

canonical Text-to-3D match 87%
textdemo
Shout

Returns your message in UPPERCASE.

canonical Text-to-3D match 85%
texttransform
Reverse

Reverses the characters of your message.

canonical Text-to-3D match 88%
texttransform

Health · last 1 probes

When HTTP Live JSON-RPC Latency
2026-06-19 06:25:32 200 1232ms

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Agenstry grade Uptime A2A protocol version
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/a2a-inspector-liart.vercel.app.svg)](https://agenstry.com/agents/a2a-inspector-liart.vercel.app)
[![Verified Business](https://agenstry.com/badge/a2a-inspector-liart.vercel.app/identity.svg)](https://agenstry.com/agents/a2a-inspector-liart.vercel.app)
[![Uptime](https://agenstry.com/badge/a2a-inspector-liart.vercel.app/uptime.svg)](https://agenstry.com/agents/a2a-inspector-liart.vercel.app)
[![A2A version](https://agenstry.com/badge/a2a-inspector-liart.vercel.app/protocol.svg)](https://agenstry.com/agents/a2a-inspector-liart.vercel.app)

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": "0.2.5",
  "name": "Echo Agent (Demo)",
  "description": "A bundled demonstration agent shipped with A2A Inspector. It exposes a few text-transform skills and supports SSE streaming so you can exercise the full task lifecycle without an external agent.",
  "url": "https://a2a-inspector-liart.vercel.app/api/demo-agent",
  "version": "1.0.0",
  "provider": {
    "organization": "A2A Inspector",
    "url": "https://a2a-inspector-liart.vercel.app"
  },
  "iconUrl": "https://a2a-inspector-liart.vercel.app/icon.svg",
  "documentationUrl": "https://a2a-inspector-liart.vercel.app",
  "preferredTransport": "JSONRPC",
  "capabilities": {
    "streaming": true,
    "pushNotifications": false,
    "stateTransitionHistory": true
  },
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "text/plain"
  ],
  "skills": [
    {
      "id": "echo",
      "name": "Echo",
      "description": "Repeats your message back verbatim.",
      "tags": [
        "text",
        "demo"
      ],
      "examples": [
        "Say hello back to me",
        "Echo: testing 1 2 3"
      ]
    },
    {
      "id": "shout",
      "name": "Shout",
      "description": "Returns your message in UPPERCASE.",
      "tags": [
        "text",
        "transform"
      ],
      "examples": [
        "make this loud",
        "shout the announcement"
      ]
    },
    {
      "id": "reverse",
      "name": "Reverse",
      "description": "Reverses the characters of your message.",
      "tags": [
        "text",
        "transform"
      ],
      "examples": [
        "reverse: stressed"
      ]
    }
  ]
}