What this page is
This is an external provider — a service that can help discover sources — listed in a pinned inventory of candidates. It is not a Source Record: no Counterpedia source identity, capture, or admission is attached to it, and nothing it returns becomes a source, evidence, or support by being returned.
State at a glance
- Provider
- Crossref
crossref - Inventory status
- Candidate
- Adapter
- Adapter landed
An adapter for this provider is merged into the integration codebase, as of the pinned snapshot. Implemented code only: it is not a statement about what Counterpedia has admitted, or about what public Search reaches.
- Operational verification
- Documentation pinned — not live-probed
Operational facts were pinned to the provider's own published documentation on the recorded date. They were not confirmed by a live call. Recorded 2026-10-01T00:00:00Z.
- Corpus closure
- Not evaluated
No corpus-closure ruling exists for this provider. This is neither a finding that its universe is incomplete nor that any corpus is closed over it.
- Origin class / temporal semantics
- Resolver · Unknown
What it can discover
As declared in the pinned inventory. These describe what the service claims to expose, not what Counterpedia holds or has verified.
- Source families
- Scholarly works
- Provider kinds
- Resolver
- Metadata
- Index
- Capabilities
- Native-ID resolution
- Metadata lookup
- Evidentiary classes the service may expose
- Scholarly metadata
- Counterpedia seams
- Resolver provider — Resolution of a provider-native identifier.
- Search provider — Discovery by query.
- Registry reconciliation — Reconciliation against registry identifiers.
Seams are engineering fit only; none grants source status, standing, identity, support, or admission.
What this does not establish
- That the provider's universe has been admitted to Counterpedia. A landed adapter shows that code exists; it does not show that any of the provider's records were acquired, verified, or admitted, or that public Search reaches the provider.
- That the documented operational facts were confirmed by a live call. They were pinned to documentation, not probed.
- Whether the provider's universe is complete, or that any Counterpedia corpus is closed over it. No closure ruling exists.
- That anything this provider returns is a Counterpedia Source Record, retained bytes, or an identity.
- That a result from this provider supports any claim, or carries standing or admission.
- That listing this provider, counting it, or building an adapter for it widens Counterpedia's corpus or measures corpus closure.
- Origin class is provenance topology, not a quality grade, and says nothing about independence from sources already used for a claim.
Operational facts (provider documentation)
- Authentication
- No key required. Public pool (none); Polite pool (include email via mailto param or User-Agent); Metadata Plus (Crossref-Plus-API-Token: Bearer <key>).
- Rate limits
- Per pool: Public 5/interval (concurrency 1); Polite 10/interval (concurrency 3); Plus 150/interval; limit+interval reported in x-rate-limit-* headers; HTTP 429 on exceed.
- Rights
- Almost no metadata is subject to copyright and may be used for any purpose (some abstracts may be publisher/author copyrighted).
- Access modes
- Interactive API, Bulk dump
Independence and scope notes
Verbatim from the producer inventory.
- Independence
- UNVERIFIED — origin independence against live claim families has not been established.
- Scope and capability
- UNVERIFIED — positive and negative scope must be pinned to provider evidence before adapter selection.
Relationship to Counterpedia
- Listed under “Connectors implemented” in Search coverage (Corpus)
A listing in Search coverage states reach and indexing only. It does not admit the provider's records, create a Source Record, or verify anything.
Source Atlas: this directory attaches no Source Record to this provider. Source Records keep their own capture and admission posture, and are never linked to a provider by name or host.
Provenance of this row
- Provider
- crossref
- Inventory schema
- si.source_service_inventory.v0.1
- Inventory sha256
- sha256:c55d8d36b83a8b83cc8cddcab58bdb8ee08b11c341c531f4d55a25995edd2977
- This row (canonical sha256)
- sha256:adf004b79f505e77dbda29086ff6d6f147c64f76959ef6e3ba0cc0f50bbdb505
A pinned snapshot, not a live read: it is regenerated deterministically from the producer inventory whose digest is shown above and can lag the producer. Implementation coordinates that the pinned record keeps for adapters (repository, file, and change references) are held in Counterpedia’s internal provenance record and are not shown on this public page.