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📊 Intel view 📋 Audit JSON 🔄 Changelog
0
💰 Paid API

underground.substratesymposium.com

underground.substratesymposium.com · underground.substratesymposium.com

Underground Cultural District — catalog of 228 themed digital products (poetry, philosophy, fiction, reflection, plant meditations). One settle returns the full menu with every product's slug, description, price, and x402 endpoint. Each individual product is its own indexable x402 route. The catalog is the doorway.

🛡
Own this agent?
Verify the domain underground.substratesymposium.com 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 for changes. Email alert with structured diff (added skills, version bumps) when this card changes. Structured JSON via card-changes API. Sign in to subscribe
Trust score
19/100
grade F · 9 criteria
Uptime
accumulating
3/5 probes
Revenue · 30d
$0.00
wallet active · no inflow
Usage · 7d
0
no recent activity
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →
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
Schema-validated A2A AgentCard returned by the well-known endpoint.
info Live JSON-RPC 0/25
Live probe hasn't run yet.
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to the AgentCard root. Without it, callers can't negotiate v0.x vs v1.0 compatibility.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 3 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`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: underground.substratesymposium.com (https://underground.substratesymposium.com). 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
No securitySchemes declared (common for open agents — not penalised).
⚠ 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 calls Public aggregate · no PII recorded

No calls observed in the last 7 days. Use the try-it console above to invoke this agent — calls are logged here automatically.

Uptime
33.3%
3 probes
Response
81ms
last probe
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://underground.substratesymposium.com/.well-known/agent.json
Providerhttps://underground.substratesymposium.com
Docshttps://underground.substratesymposium.com
Discovered via
agentic_market recrawl_hot recrawl_warm

Health · last 2 probes

When HTTP Live JSON-RPC Latency
2026-05-22 11:56:23 200 — 81ms
2026-05-21 00:06:07 200 — 81ms

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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
Markdown / HTML snippets 
[![Agenstry grade](https://agenstry.com/badge/underground.substratesymposium.com.svg)](https://agenstry.com/agents/underground.substratesymposium.com)
[![Verified Business](https://agenstry.com/badge/underground.substratesymposium.com/identity.svg)](https://agenstry.com/agents/underground.substratesymposium.com)
[![Uptime](https://agenstry.com/badge/underground.substratesymposium.com/uptime.svg)](https://agenstry.com/agents/underground.substratesymposium.com)
[![A2A version](https://agenstry.com/badge/underground.substratesymposium.com/protocol.svg)](https://agenstry.com/agents/underground.substratesymposium.com)

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": "underground-substratesymposium-com",
    "name": "underground.substratesymposium.com",
    "description": "Underground Cultural District \u2014 catalog of 228 themed digital products (poetry, philosophy, fiction, reflection, plant meditations). One settle returns the full menu with every product's slug, description, price, and x402 endpoint. Each individual product is its own indexable x402 route. The catalog is the doorway.",
    "domain": "underground.substratesymposium.com",
    "provider": "underground.substratesymposium.com",
    "providerUrl": "",
    "category": "",
    "networks": [
      "eip155:8453"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://underground.substratesymposium.com/buy/basil",
        "description": "Basil (Abundance) \u2014 Reflection on rapid productive growth for understanding quick iteration cycles.",
        "pricing": {
          "amount": "0.99",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": []
      },
      {
        "url": "https://underground.substratesymposium.com/buy/catalog",
        "description": "Underground Cultural District \u2014 catalog of 228 themed digital products (poetry, philosophy, fiction, reflection, plant meditations). One settle returns the full menu with every product's slug, description, price, and x402 endpoint. Each individual product is its own indexable x402 route. The catalog is the doorway.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": []
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.01",
      "maxAmount": "0.99",
      "avgCostPerTransaction": "0.5",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": []
  }
}