70
💰 Paid API
Crossref-Work-By-Doi
crossref-work-by-doi.hergertsynthora.com
· crossref-work-by-doi.hergertsynthora.com
Returns authoritative Crossref registration metadata for any DOI: title, authors, container journal, ISSN, publisher, reference list, funder and license info as structured JSON. A core keyless enrichment endpoint for autonomous research agents and agent-to-agent citation-verification and bibliographic pipelines. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.
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Verify the domain
crossref-work-by-doi.hergertsynthora.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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Trust score
34/100
grade F · 9 criteria
Uptime
not measured
no direct probes in 30d
Observed inflow · 30d
not yet measured
wallet declared · scan pending
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
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.
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click to collapse breakdown ▴
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
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: crossref-work-by-doi.hergertsynthora.com (https://crossref-work-by-doi.hergertsynthora.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.
⚠ 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 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.
Uptime
not measured
0 direct probes · 30d
Response
—
no direct probe retained
Skills
0
declared
Streaming
—
SSE-capable
Endpoints
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.
Settlement wallet:
0x6d9f318463168ff637b50e5b9a21392e97c7c167 · basescan ↗
| Agent card | https://crossref-work-by-doi.hergertsynthora.com/ |
| Provider | https://crossref-work-by-doi.hergertsynthora.com/ |
| Docs | https://crossref-work-by-doi.hergertsynthora.com/service |
Discovered via
cdp_discovery
Health · last 0 probes
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Markdown / HTML snippets
[](https://agenstry.com/agents/crossref-work-by-doi.hergertsynthora.com) [](https://agenstry.com/agents/crossref-work-by-doi.hergertsynthora.com) [](https://agenstry.com/agents/crossref-work-by-doi.hergertsynthora.com) [](https://agenstry.com/agents/crossref-work-by-doi.hergertsynthora.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.
Raw agent card JSON
{
"_source": "cdp_discovery",
"resource_count": 1,
"sample": "https://crossref-work-by-doi.hergertsynthora.com/service"
}