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📊 Intel view 📋 Audit JSON 🔄 Changelog
65
💰 Paid API content

Supreme Audiobooks

supremeaudiobooks.com · supremeaudiobooks.com

A corpus of 3,029 public-domain audiobooks by 1,822 authors, with original editorial descriptions and 1,644 machine transcripts across 12 languages (ar, bg, de, en, es, fr, hi, ja, ko, pt, ru, zh). Four x402-metered endpoints: the full catalogue, per-book records, substring search over title and author, and full transcript text per book per language. The audio is public-domain LibriVox narration and is NOT sold here; it is free from us and from LibriVox. What is metered is our own work: the catalogue metadata, the editorial essays, and the transcripts and translations. Human-facing pages and search-engine crawlers are never charged. Terms: https://supremeaudiobooks.com/licensing

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🛡
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Verify the domain supremeaudiobooks.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.
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🔔 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
34/100
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
0 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

F
Conformance score: 34/100
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).
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 →
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 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`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: supremeaudiobooks.com (https://supremeaudiobooks.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
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

Activity (audit trail)

last 24h · 0 invocations 100.0% success Public aggregate · no PII recorded
0
invocations 7d
reached the endpoint through us
0
lookups 7d
our API answered about it
0
impressions 7d
appeared in a result list
Per event type (7d)
3
search_click
Recent events (last 20)
When Event Method Status Latency
2026-09-08T19:54:55 search_click /agents — ok 4ms
2026-09-08T19:49:09 search_click /agents — ok 1ms
2026-09-08T19:07:42 search_click /agents — ok 2ms
Uptime
not measured
0 direct probes · 30d
Response
—
no direct probe retained
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Pricing x402 on Base USD Third-party catalog Dispute or improve this rating
From $0.0010 per call
This agent accepts x402 payments but did not publish a per-endpoint price map.
Try it ↗ Opens the operator's playground / docs in a new tab.
Agent cardhttps://supremeaudiobooks.com
Providerhttps://supremeaudiobooks.com
Docshttps://supremeaudiobooks.com
Discovered via
x402_list

Health · last 0 probes

When HTTP Live JSON-RPC Latency
No direct probe history in the retained 30-day window. Upstream catalogue observations do not count as uptime probes.

Who's calling this agent 30d

4 interactions captured (impressions + lookups + A2A calls)

By AI host (caller_kind) · top 3
ClaudeBot (training crawler) 4 (100%)
Caller geography · top 3
US 4
Via which API surface · top 3
web 4

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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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/supremeaudiobooks.com.svg)](https://agenstry.com/agents/supremeaudiobooks.com)
[![Verified Business](https://agenstry.com/badge/supremeaudiobooks.com/identity.svg)](https://agenstry.com/agents/supremeaudiobooks.com)
[![Uptime](https://agenstry.com/badge/supremeaudiobooks.com/uptime.svg)](https://agenstry.com/agents/supremeaudiobooks.com)
[![A2A version](https://agenstry.com/badge/supremeaudiobooks.com/protocol.svg)](https://agenstry.com/agents/supremeaudiobooks.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": "x402_list",
  "slug": "supreme-audiobooks",
  "endpoint_count": 3,
  "attribution": "Data: x402-list.com (CC BY 4.0)"
}