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📊 Intel view 📋 Audit JSON 🔄 Changelog
65
💰 Paid API A2A 1.0 v1.0.0

agent-contract-proof.mattskowronis.workers.dev

agent-contract-proof.mattskowronis.workers.dev · agent-contract-proof.mattskowronis.workers.dev

Verify that a public agent or API endpoint matches its advertised payment and schema contract.

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🛡
Own this agent?
Verify the domain agent-contract-proof.mattskowronis.workers.dev 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
63/100
grade C · 9 criteria
Uptime
100.0%
37 direct probes · 30d
~26 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
10 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

C
Conformance score: 63/100
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).
partial Live JSON-RPC 15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 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 →
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
37/37 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 →
partial Verified Identity 5/10
Provider declared: agent-contract-proof.mattskowronis.workers.dev (https://agent-contract-proof.mattskowronis.workers.dev). 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

10 snapshots drifted 9× Every change to agent-card.json
Captured Hash
2026-09-08 14:45:54 current 21c0e261e51f… view →
2026-09-08 08:02:44 21c0e261e51f… view →
2026-09-08 01:57:55 21c0e261e51f… view →
2026-09-07 19:55:30 21c0e261e51f… view →
2026-09-07 13:52:47 21c0e261e51f… view →
2026-09-07 07:21:05 21c0e261e51f… view →
2026-09-07 00:55:38 21c0e261e51f… view →
2026-09-06 19:20:52 21c0e261e51f… view →
2026-09-06 13:24:08 21c0e261e51f… view →
2026-09-06 06:53:18 21c0e261e51f… view →
Showing latest 10. Older snapshots available via GET /api/agents/agent-contract-proof.mattskowronis.workers.dev/snapshots.
Uptime
100.0%
37 direct probes · 30d
Response
45ms
last direct probe
Skills
1
declared
Streaming
—
SSE-capable

Endpoints

Pricing x402 Self-declared · /.well-known/x402 Dispute or improve this rating
Endpoint Price Currency
https://agent-contract-proof.mattskowronis.workers.dev/v1/verify —
Try it ↗ Opens the operator's playground / docs in a new tab.
Agent cardhttps://agent-contract-proof.mattskowronis.workers.dev/.well-known/agent-card.json
Providerhttps://agent-contract-proof.mattskowronis.workers.dev
Docshttps://skowronworks.com/agent-tools/agent-contract-proof/
Discovered via
registry cdp_discovery agentic_market a2a_registry_org

Skills · 1 declared · mapped to canonical taxonomy

Verify Agent Contract

Compare an agent's advertised contract with its live x402 challenge and return deterministic proof.

canonical X402 Usdc Payments match 87%
x402agent-contractpayment-proofschema-verificationdependency-monitoring

Health · last 30 probes

When HTTP Live JSON-RPC Latency
2026-09-08 14:45:54 200 ✗ 45ms
2026-09-08 08:02:44 200 ✗ 33ms
2026-09-08 01:57:55 200 ✗ 18ms
2026-09-07 19:55:30 200 ✗ 20ms
2026-09-07 13:52:47 200 ✗ 23ms
2026-09-07 07:21:05 200 ✗ 27ms
2026-09-07 00:55:38 200 ✗ 23ms
2026-09-06 19:20:52 200 ✗ 24ms
2026-09-06 13:24:08 200 ✗ 21ms
2026-09-06 06:53:18 200 ✗ 17ms

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.

X402 Usdc Payments agent_skills
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/agent-contract-proof.mattskowronis.workers.dev.svg)](https://agenstry.com/agents/agent-contract-proof.mattskowronis.workers.dev)
[![Verified Business](https://agenstry.com/badge/agent-contract-proof.mattskowronis.workers.dev/identity.svg)](https://agenstry.com/agents/agent-contract-proof.mattskowronis.workers.dev)
[![Uptime](https://agenstry.com/badge/agent-contract-proof.mattskowronis.workers.dev/uptime.svg)](https://agenstry.com/agents/agent-contract-proof.mattskowronis.workers.dev)
[![A2A version](https://agenstry.com/badge/agent-contract-proof.mattskowronis.workers.dev/protocol.svg)](https://agenstry.com/agents/agent-contract-proof.mattskowronis.workers.dev)

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 
{
  "_source": "agentic.market",
  "service": {
    "id": "agent-contract-proof-mattskowronis-workers-dev",
    "name": "agent-contract-proof.mattskowronis.workers.dev",
    "description": "",
    "domain": "agent-contract-proof.mattskowronis.workers.dev",
    "provider": "agent-contract-proof.mattskowronis.workers.dev",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://agent-contract-proof.mattskowronis.workers.dev/v1/verify",
        "description": "Compare an agent's advertised contract with its live x402 challenge and return deterministic proof.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://source-claim-proof.mattskowronis.workers.dev",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "",
        "tags": [],
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "1"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.01",
      "maxAmount": "0.01",
      "avgCostPerTransaction": "0.01",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": [],
    "iconUrl": ""
  }
}