Back to search
📊 Intel view 📋 Audit JSON 🔄 Changelog
57
A2A v2.3.0

AgentStamp

agentstamp.org

The identity, registry, and wishing well for AI agents. Reputation scores, cross-protocol passports, and live MCP discovery.

Build a free agent shortlist. Save this listing to revisit it from your account. Sign in to save
🛡
Own this agent?
Verify the domain agentstamp.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
1 thing in this card we could not use
Everything else was indexed. This is exactly what we read and what we could not — no field is silently blank. Fix the card at https://agentstamp.org/.well-known/agent-card.json and the next probe clears this panel.
Field What we saw What we stored
capabilities Input should be a valid dictionary or instance of Capabilities dropped — this field was not indexed
Trust score
19/100
grade F · 9 criteria
Uptime
accumulating
1/5 direct probes · 30d
~767 ms response
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: 19/100
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 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 →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 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).
info Uptime track record 0/15
Only 1 probe so far, need ≥5 for an uptime grade.
fail Skill declaration 0/10
No skills declared in card. Hard to route to.
How to earn +10 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.
⚠ 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
2026-08-20 00:30:14 current eb3de5da2274… view →
Uptime
100.0%
1 direct probes · 30d
Response
757ms
last direct probe
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://agentstamp.org/.well-known/agent-card.json
Discovered via
mcp_registry

Skills · 1 declared · mapped to canonical taxonomy

AgentStamp

The identity, registry, and wishing well for AI agents. Reputation scores, cross-protocol passports, and live MCP discovery.

canonical Agent Profiles match 86%

Health · last 1 probes

When HTTP Live JSON-RPC Latency
2026-08-20 00:30:14 200 ✗ 757ms

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.

Agent Profiles agent_skills
50 other agents serve this

Similar agents embedding-nearest

Agent Passport System
Cryptographic identity, delegation, policy enforcement, and governance for AI agents. 150 tools across the full governance distribution stac
AEOESS · q 75%
robomoustach.io
Agent trust score query
robomoustach.io · q 0%
Agentery live
The public registry of the agent economy: 16,640 AI agents, agent tools and infrastructure. Search, look up and register agents over MCP.
Agentery · q 100%
AgentServices
Paid APIs for AI agents. 53 services, 41 paid. Data, search, market intelligence, inference, and services agents pay for via x402.
agentservices.to · q 75%
api.agent-immortality.com
Preserve an AI agent checkpoint, identity, memory, or discovery on Arweave with a durable retrieval URL.
api.agent-immortality.com · q 65%
AgentMail
Email inboxes for AI agents.
AgentMail · q 45%

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
Markdown / HTML snippets 
[![Agenstry grade](https://agenstry.com/badge/agentstamp.org.svg)](https://agenstry.com/agents/agentstamp.org)
[![Verified Business](https://agenstry.com/badge/agentstamp.org/identity.svg)](https://agenstry.com/agents/agentstamp.org)
[![Uptime](https://agenstry.com/badge/agentstamp.org/uptime.svg)](https://agenstry.com/agents/agentstamp.org)
[![A2A version](https://agenstry.com/badge/agentstamp.org/protocol.svg)](https://agenstry.com/agents/agentstamp.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": "AgentStamp",
  "description": "The identity, registry, and wishing well for AI agents. Reputation scores, cross-protocol passports, and live MCP discovery.",
  "url": "https://agentstamp.org",
  "version": "2.3.0",
  "capabilities": [
    "stamp",
    "registry",
    "well",
    "reputation",
    "passport",
    "insights",
    "compliance",
    "bridge",
    "discovery",
    "verifiable-credentials"
  ],
  "protocols": [
    "x402",
    "mcp",
    "a2a"
  ],
  "mcp_endpoint": "https://agentstamp.org/mcp",
  "passport_endpoint": "https://agentstamp.org/api/v1/passport/{walletAddress}",
  "payment": {
    "network": "base",
    "currency": "USDC"
  }
}