API & Export
POSI provides selected public metadata endpoints for transparency, reuse, and verification. All API records preserve source attribution and provenance where available.
API Status: The POSI public API is currently in planning phase. Endpoints listed below represent the intended specification. Currently, data can be accessed through the DOI Lookup tool, journal pages, and article pages on this site. API availability will be announced on this page.
Base URL
All endpoints return JSON by default. Append ?format=csv or ?format=bibtex for alternative formats.
Planned Endpoints
/api/statsPlatform statistics: total journals, articles, DOI records, sync status
/api/journalsList journal records with available metadata, verification status, and PQF status
/api/journals/{slug}Single journal record including PQF breakdown and evidence status
/api/articlesList articles with filters: journal, year, DOI status, license, MQS range
/api/articles/{doi}Single article record with full metadata, MQS, and CVI
/api/searchFull-text search across articles, journals, and authors
/api/doi/{doi}DOI lookup: Crossref status, OpenAlex match, citation visibility, MQS
/api/pqf/{slug}PQF score and subfactor breakdown for a specific journal
/api/evidence/{slug}Evidence records for a specific journal
/api/sources/statusData source sync status: last sync date, record counts per source
Query Parameters
| Parameter | Description |
|---|---|
| q | Full-text search query |
| journal | Filter by journal slug (e.g. grhas, afs) |
| year | Filter by publication year (e.g. 2025) |
| doi | Filter by exact DOI |
| license | Filter by license (e.g. CC BY 4.0) |
| scope | "psg" for PSG journals only, "all" for full Crossref scope |
| page | Page number (default: 1) |
| rows | Results per page (default: 20, max: 100) |
| format | Export format: json, csv, bibtex, ris |
Export Formats
Machine-readable structured data with full provenance fields
Tabular export for spreadsheet analysis
Citation export for reference managers (Zotero, Mendeley, JabRef)
Standardized citation format for all major reference managers
Data Reuse & Attribution
POSI metadata is available for open reuse. All records include source attribution indicating whether data originates from Crossref, OpenAlex, OpenCitations, DOAJ, ROR, or ORCID.
When citing or reusing POSI data, please attribute the original data sources (Crossref, OpenAlex, etc.) as indicated in each record's provenance fields. POSI does not claim ownership of metadata sourced from third-party registries.
PQF scores are produced by POSI under CC BY 4.0. Attribution: "POSI Quality Framework (PQF), Panorama Open Scholarly Index, panorama-sg.com".
Rate Limits & Access
Public endpoints: 60 requests/minute per IP (planned).
Bulk data exports: Contact the POSI team for institutional data agreements.
Current data access: Use the DOI Lookup, Search, and Journal pages while the public API is in development.