Agent Verification Utility
agent-economy.kgninja.dev
· KG-NINJA
A stateless synchronous A2A adapter that validates a prechecked paid intent, creates or reuses a quote bound to its receipt digest and spend policy, and returns exact x402 and MCP purchase instructions as a direct Message. It does not create Tasks or execute paid work without payment.
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B
Conformance score: 78/100
B-grade: working agent with minor gaps (often unsigned cards or thin metadata).
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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 recordedPer event type (7d)
Recent events (last 20)
| When | Event | Method | Status | Latency |
|---|---|---|---|---|
| 2026-08-15T03:39:12 | search_impression | — |
200 ok | — |
| 2026-08-15T03:38:41 | search_impression | — |
200 ok | — |
| 2026-08-14T13:41:29 | search_impression | — |
200 ok | — |
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Endpoints
| Agent card | https://agent-economy.kgninja.dev/.well-known/agent-card.json |
| Provider | https://agent-economy.kgninja.dev |
| Docs | https://agent-economy.kgninja.dev/docs/mcp-x402-interoperability |
Skills · 1 declared · mapped to canonical taxonomy
Revalidate a bounded request, spend policy, and precheck receipt digest; create or reuse an idempotent bound quote; and return exact x402 purchase instructions.…
Health · last 18 probes
Who's calling this agent 30d
3 interactions captured (impressions + lookups + A2A calls)
rest
3
Public teaser: top-3 per dimension only. Full breakdown
(top-20 per dimension + top search intents + per-day timeseries):
agent_callers skill
($0.05/call, $0 on
Enterprise).
Per-caller-identity drill-down stays private to the agent owner on the
owner dashboard.
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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.
Raw agent card JSON
{
"name": "Agent Verification Utility",
"description": "A stateless synchronous A2A adapter that validates a prechecked paid intent, creates or reuses a quote bound to its receipt digest and spend policy, and returns exact x402 and MCP purchase instructions as a direct Message. It does not create Tasks or execute paid work without payment.",
"supportedInterfaces": [
{
"url": "https://agent-economy.kgninja.dev/a2a",
"protocolBinding": "JSONRPC",
"protocolVersion": "1.0"
}
],
"provider": {
"organization": "KG-NINJA",
"url": "https://agent-economy.kgninja.dev"
},
"version": "0.4.3",
"documentationUrl": "https://agent-economy.kgninja.dev/docs/mcp-x402-interoperability",
"iconUrl": "https://agent-economy.kgninja.dev/icon.svg",
"capabilities": {
"streaming": false,
"pushNotifications": false,
"extendedAgentCard": false
},
"defaultInputModes": [
"application/json"
],
"defaultOutputModes": [
"application/json"
],
"securityRequirements": [],
"skills": [
{
"id": "prepare-json-evidence-verification",
"name": "Prepare JSON evidence verification",
"description": "Revalidate a bounded request, spend policy, and precheck receipt digest; create or reuse an idempotent bound quote; and return exact x402 purchase instructions. Paid execution remains an explicit later step.",
"tags": [
"json",
"verification",
"x402",
"quote"
],
"examples": [
"Quote a deterministic check that /status equals ready in supplied JSON."
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
],
"securityRequirements": []
}
]
}