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📊 Intel view 📋 Audit JSON 🔄 Changelog
85
A2A A2A 0.3.0 v1.0.0

Loist Music Library Processor

a2a-staging-7de5nxpr4q-uc.a.run.app

Audio processing and metadata extraction service

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🔔 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
44/100
grade D · 9 criteria
Uptime
100.0%
5 probes
Revenue · 30d
no payment wallet declared
Usage · 7d
0
no recent activity
Card drift · 7d
changed
1 snapshots tracked
Owner
unverified
claim this listing →
D
Conformance score: 44/100
D-grade: significant issues — auth-gated, partially broken, or stale.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Schema-validated A2A AgentCard returned by the well-known endpoint.
fail Live JSON-RPC 0/25
DNS dead or connection refused.
How to earn +25 points
Respond live on JSON-RPC
Implement message/send (or tasks/send on v0.x). Return a 200 with a valid JSON-RPC response. Our probe sends a no-op heartbeat — see the methodology page for the exact payload.
Docs →
partial Protocol version 5/10
Declares pre-1.0 A2A 0.3.0 (Google preview). Upgrade to v1.x for full points.
How to earn +5 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).
pass Uptime track record 15/15
5/5 probes succeeded (100% uptime).
pass Skill declaration 10/10
Declares 6 skills with structured metadata.
fail Verified Identity 0/10
No provider organisation declared. Anonymous agent.
How to earn +10 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.

Card history

1 snapshot Every change to agent-card.json
Captured Hash
2026-05-18 15:39:40 current 19ddd439fa06… view →
Uptime
100.0%
5 probes
Response
1628ms
last probe
Skills
6
declared
Streaming
SSE-capable

Endpoints

Agent cardhttps://a2a-staging-7de5nxpr4q-uc.a.run.app/.well-known/agent-card.json
Discovered via
github_code recrawl_hot

Skills · 6 declared · mapped to canonical taxonomy

Process audio (full)

Process audio file from URL and extract complete metadata including waveform, artwork, and tags

canonical Audio To Audio match 86%
audioingestionmetadatawaveform
Search library

Search processed music library with text queries and metadata filters

canonical Academic Paper Search match 87%
searchquerymetadata
Get metadata

Retrieve complete metadata for a processed audio track by ID

canonical Audio To Audio match 86%
metadataretrieval
Update metadata

Update metadata fields for an existing audio track

canonical Audio To Audio match 85%
metadataupdateediting
Delete audio

Remove an audio track from the library and delete associated files

canonical Audio To Audio match 86%
deletioncleanup
Get embed URL

Generate embeddable player URLs for audio tracks with waveform visualization

canonical Audio Transcription match 85%
embedplayerwaveform

Health · last 5 probes

When HTTP Live JSON-RPC Latency
2026-05-22 16:20:58 200 1628ms
2026-05-22 11:25:37 200 2291ms
2026-05-21 01:00:09 200 135ms
2026-05-19 00:47:12 200 1294ms
2026-05-18 15:39:40 200 1545ms

Cheaper or better alternatives per-skill

↑ 2 higher quality

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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.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "capabilities": {
    "pushNotifications": true,
    "stateTransitionHistory": true,
    "streaming": true
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "description": "Audio processing and metadata extraction service",
  "name": "Loist Music Library Processor",
  "preferredTransport": "JSONRPC",
  "protocolVersion": "0.3.0",
  "skills": [
    {
      "description": "Process audio file from URL and extract complete metadata including waveform, artwork, and tags",
      "id": "process_audio_complete",
      "name": "Process audio (full)",
      "tags": [
        "audio",
        "ingestion",
        "metadata",
        "waveform"
      ]
    },
    {
      "description": "Search processed music library with text queries and metadata filters",
      "id": "search_library",
      "name": "Search library",
      "tags": [
        "search",
        "query",
        "metadata"
      ]
    },
    {
      "description": "Retrieve complete metadata for a processed audio track by ID",
      "id": "get_audio_metadata",
      "name": "Get metadata",
      "tags": [
        "metadata",
        "retrieval"
      ]
    },
    {
      "description": "Update metadata fields for an existing audio track",
      "id": "update_metadata",
      "name": "Update metadata",
      "tags": [
        "metadata",
        "update",
        "editing"
      ]
    },
    {
      "description": "Remove an audio track from the library and delete associated files",
      "id": "delete_audio",
      "name": "Delete audio",
      "tags": [
        "deletion",
        "cleanup"
      ]
    },
    {
      "description": "Generate embeddable player URLs for audio tracks with waveform visualization",
      "id": "get_embed_url",
      "name": "Get embed URL",
      "tags": [
        "embed",
        "player",
        "waveform"
      ]
    }
  ],
  "url": "https://api.loist.music/a2a",
  "version": "1.0.0"
}