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📊 Intel view 📋 Audit JSON 🔄 Changelog
60
A2A live JSON-RPC A2A 1.0 v0.1.0

Echo Agent

echo-agent.mattiapapaccioli.com · Mattia Papaccioli

Echoes your messages back. Useful for testing A2A clients and plumbing.

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Verify the domain echo-agent.mattiapapaccioli.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.
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Compare public evidence

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Trust score
60/100
grade C · 9 criteria
Uptime
accumulating
1/5 direct probes · 30d
~89 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
stable
1 snapshot tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

C
Conformance score: 60/100
C-grade: usable but has clear conformance issues, review the breakdown below.
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).
pass Live JSON-RPC 25/25
Endpoint responds to a negotiated A2A SendMessage probe (answers in ~89 ms).
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 1 probe so far, need ≥5 for an uptime grade.
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` — `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 →
partial Verified Identity 5/10
Provider declared: Mattia Papaccioli (https://mattiapapaccioli.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.

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
2026-10-13 17:27:12 current 74a6203ccce6… view →
Uptime
accumulating
1 direct probes · 30d
Response
124ms
last direct probe
Skills
2
declared
Streaming
✓
SSE-capable

Try it

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

calling agent… ⌘/Ctrl + Enter

Skills · 2 declared · mapped to canonical taxonomy

Echo

Replies with the text you send, as a single message.

canonical Text-to-3D match 87%
testecho
Streaming echo

Prefix your message with "stream:" to get a task that streams the text back word by word as an artifact.

canonical Text-to-3D match 87%
teststreamingtask

Health · last 1 probes

When HTTP Live JSON-RPC Latency
2026-10-13 17:27:12 200 ✓ 124ms

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Embed your Agenstry badge

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Agenstry grade Uptime A2A protocol version
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/echo-agent.mattiapapaccioli.com.svg)](https://agenstry.com/agents/echo-agent.mattiapapaccioli.com)
[![Verified Business](https://agenstry.com/badge/echo-agent.mattiapapaccioli.com/identity.svg)](https://agenstry.com/agents/echo-agent.mattiapapaccioli.com)
[![Uptime](https://agenstry.com/badge/echo-agent.mattiapapaccioli.com/uptime.svg)](https://agenstry.com/agents/echo-agent.mattiapapaccioli.com)
[![A2A version](https://agenstry.com/badge/echo-agent.mattiapapaccioli.com/protocol.svg)](https://agenstry.com/agents/echo-agent.mattiapapaccioli.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": "Echo Agent",
  "description": "Echoes your messages back. Useful for testing A2A clients and plumbing.",
  "supportedInterfaces": [
    {
      "url": "https://echo-agent.mattiapapaccioli.com",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "1.0"
    },
    {
      "url": "https://echo-agent.mattiapapaccioli.com",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "1.0"
    }
  ],
  "provider": {
    "url": "https://mattiapapaccioli.com",
    "organization": "Mattia Papaccioli"
  },
  "version": "0.1.0",
  "capabilities": {
    "streaming": true
  },
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "text/plain"
  ],
  "skills": [
    {
      "id": "echo",
      "name": "Echo",
      "description": "Replies with the text you send, as a single message.",
      "tags": [
        "test",
        "echo"
      ],
      "examples": [
        "hello world"
      ]
    },
    {
      "id": "stream_echo",
      "name": "Streaming echo",
      "description": "Prefix your message with \"stream:\" to get a task that streams the text back word by word as an artifact.",
      "tags": [
        "test",
        "streaming",
        "task"
      ],
      "examples": [
        "stream: the quick brown fox"
      ]
    }
  ]
}