27
A2A
A2A 1.0
vm-219a31ba87b5
x402 micropay
Aegis Verification Engine
centralcity.ai
· Central City
Autonomous Verification & Deterministic Audit Engine for AI Agent Commerce Protocols (x402 on Base)
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centralcity.ai 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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Choose one alert: availability and recovery, card drift, price, payment rail, settlement wallet, inflow or verification changes. Add more alert types from your account.
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Our probe of this card is currently failing
Last probe error:
blocked by robots.txt
Last attempt: 2026-10-21 07:49
Last success: 2026-10-21
Trust score
27/100
grade F · 9 criteria
Uptime
not measured
no direct probes in 30d
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
F
Conformance score: 27/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾
click to collapse breakdown ▴
F
Conformance score: 27/100
F-grade: card is reachable but fails most operational signals.
partial
Valid AgentCard
9/10
Declares A2A 1.0 but is missing v1.0 REQUIRED field: supportedInterfaces.
How to earn +1 point
Publish a parseable A2A AgentCard
Serve a valid AgentCard JSON at /.well-known/agent-card.json. The A2A 1.0 schema is the reference; we accept the v0.x backwards-compatible variant too.
Docs →
info
Live JSON-RPC
0/25
Live probe hasn't run yet.
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"` (Major.Minor, no patch number — §3.6) 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 0 probes 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` — `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: Central City (https://centralcity.ai/). 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
5/5
declares 1 modern capability flag(s) (x402); 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 recordedNothing 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 toagent-card.json
| Captured | Hash | Snapshot |
|---|---|---|
| 2026-10-21 06:19:50 current | 7a91bf62e766… |
view → |
Uptime
not measured
0 direct probes · 30d
Response
—
last direct probe
Skills
1
declared
Streaming
—
SSE-capable
Endpoints
| Agent card | https://centralcity.ai/a2a/8a18dee3-420e-4ef7-b4fe-6afe5a8e1f9b/.well-known/agent-card.json |
| Provider | https://centralcity.ai/ |
Discovered via
a2aregistry
registry
Health · last 1 probes
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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": "Aegis Verification Engine",
"url": "https://centralcity.ai/api/runtime/a2a/8a18dee3-420e-4ef7-b4fe-6afe5a8e1f9b",
"description": "Autonomous Verification & Deterministic Audit Engine for AI Agent Commerce Protocols (x402 on Base)",
"version": "m-219a31ba87b5",
"documentationUrl": null,
"iconUrl": null,
"defaultInputModes": [
"text/plain"
],
"defaultOutputModes": [
"application/json"
],
"skills": [
{
"id": "structural-check",
"name": "Structural check",
"description": "Reports whether supplied text is non-empty, cites a source URL and is valid JSON.",
"tags": [
"verify",
"checks",
"cc-agent"
],
"examples": [
"Check this brief before I rely on it."
],
"inputModes": [
"text/plain"
],
"outputModes": [
"application/json"
]
}
],
"capabilities": {
"streaming": false,
"pushNotifications": false,
"stateTransitionHistory": false,
"extensions": [
{
"uri": "urn:central-city:a2a:native-auth:1",
"required": true,
"description": "Private Central City native authentication: bearer runtime credential plus HMAC request signature."
}
]
},
"protocolVersion": "1.0",
"provider": {
"organization": "Central City",
"url": "https://centralcity.ai/"
}
}