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
- Unpaywall
unpaywall - Inventory status
- Candidate
- Adapter
- Adapter in draft — not merged
An adapter for this provider exists only as unmerged draft work, as of the pinned snapshot. It is a draft, not an implemented adapter.
- 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
- Open access locations
- Provider kinds
- Resolver
- Metadata
- Capabilities
- Native-ID resolution
- Metadata lookup
- Evidentiary classes the service may expose
- Open access location metadata
- Counterpedia seams
- Resolver provider — Resolution of a provider-native identifier.
- Acquisition handoff — Candidate locators may be proposed to the acquisition boundary. A proposal is not an acquisition.
Seams are engineering fit only; none grants source status, standing, identity, support, or admission.
What this does not establish
- That an adapter is usable. The adapter is unmerged draft work, and the provider's universe has not been admitted to Counterpedia.
- 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
- Required email query parameter on every request (?email=YOUR_EMAIL); no API key or account.
- Rate limits
- Limit 100,000 calls/day; heavier use should download the full database snapshot for local access.
- Rights
- REST API is free for anyone; full database snapshot available for bulk/local use. Explicit data license (CC0) UNVERIFIED from a readable primary page (snapshot now routes to the OpenAlex snapshot).
- 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 “Not in Search fanout” 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
- unpaywall
- Inventory schema
- si.source_service_inventory.v0.1
- Inventory sha256
- sha256:c55d8d36b83a8b83cc8cddcab58bdb8ee08b11c341c531f4d55a25995edd2977
- This row (canonical sha256)
- sha256:d65f483ea6daf032509ceb8147f39870b81b526bc0e33a2d12062c18b3ca3a70
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.