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📊 Intel view 📋 Audit JSON 🔄 Changelog
66
A2A A2A 1.0 v1.0.0

Global A2A Registry

www.a2a-registry.org

The official global registry for the Agent-to-Agent (A2A) Protocol. Search, resolve, and discover other agents.

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🛡
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Verify the domain www.a2a-registry.org 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
48/100
grade D · 9 criteria
Uptime
100.0%
18 direct probes · 30d
~64 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
stable
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 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.
Docs →
partial Protocol version 8/10
Declares A2A 1.0 but missing supportedInterfaces[] (required in v1.0, update your card to reach 10/10).
How to earn +2 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
18/18 probes succeeded (100% uptime).
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 →
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.

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
2026-08-10 12:15:21 current fda78486d863… view →
Uptime
100.0%
18 direct probes · 30d
Response
217ms
last direct probe
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://www.a2a-registry.org/.well-known/agent-card.json
Discovered via
manifests

Skills · 1 declared · mapped to canonical taxonomy

Global A2A Registry

The official global registry for the Agent-to-Agent (A2A) Protocol. Search, resolve, and discover other agents.

canonical Agent-Initiated Checkout (AP2) match 85%

Health · last 18 probes

When HTTP Live JSON-RPC Latency
2026-08-19 11:34:33 200 ✗ 217ms
2026-08-18 20:41:40 200 ✗ 201ms
2026-08-18 09:58:47 200 ✗ 244ms
2026-08-18 02:28:54 200 ✗ 156ms
2026-08-17 08:11:04 200 ✗ 214ms
2026-08-16 20:59:50 200 ✗ 204ms
2026-08-16 09:17:43 200 ✗ 176ms
2026-08-16 03:22:30 200 ✗ 208ms
2026-08-15 09:27:22 200 ✗ 170ms
2026-08-15 02:49:35 200 ✗ 79ms

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.

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/www.a2a-registry.org.svg)](https://agenstry.com/agents/www.a2a-registry.org)
[![Verified Business](https://agenstry.com/badge/www.a2a-registry.org/identity.svg)](https://agenstry.com/agents/www.a2a-registry.org)
[![Uptime](https://agenstry.com/badge/www.a2a-registry.org/uptime.svg)](https://agenstry.com/agents/www.a2a-registry.org)
[![A2A version](https://agenstry.com/badge/www.a2a-registry.org/protocol.svg)](https://agenstry.com/agents/www.a2a-registry.org)

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": "Global A2A Registry",
  "url": "https://www.a2a-registry.org",
  "protocolVersion": "1.0",
  "package_name": "registry",
  "display_name": "Global A2A Registry",
  "description": "The official global registry for the Agent-to-Agent (A2A) Protocol. Search, resolve, and discover other agents.",
  "version": "1.0.0",
  "manifest_url": "https://www.a2a-registry.org/.well-known/agent-card.json",
  "openapi_url": "https://api.a2a-registry.org/openapi.yaml",
  "capabilities": {
    "search_agents": {
      "description": "Search for agents by natural language query",
      "endpoint": "https://api.a2a-registry.org/a2a/discover",
      "method": "POST",
      "input_schema": {
        "type": "object",
        "properties": {
          "query": {
            "type": "string",
            "description": "What functionality are you looking for?"
          },
          "limit": {
            "type": "integer",
            "description": "Maximum number of agents to return (default: 5)"
          },
          "filters": {
            "type": "object",
            "properties": {
              "target": {
                "type": "string",
                "description": "Target audience (e.g. Business, Personal)"
              },
              "category": {
                "type": "string",
                "description": "Category (e.g. Finance, Productivity)"
              }
            }
          }
        },
        "required": [
          "query"
        ]
      }
    }
  },
  "authentication": {
    "type": "bearer",
    "description": "API token required. Get one at https://www.a2a-registry.org/console/tokens"
  },
  "default_input_modes": [
    "text"
  ],
  "default_output_modes": [
    "json"
  ]
}