papers.use.x402atlas.com

{
  "properties": {
    "abstract": {
      "description": "Empty if no source has one",
      "type": "string"
    },
    "authors": {
      "items": {
        "type": "string"
      },
      "type": "array"
    },
    "citation": {
      "properties": {
        "apa": {
          "description": "APA 7",
          "type": "string"
        },
        "bibtex": {
          "type": "string"
        }
      },
      "required": [
        "bibtex",
        "apa"
      ],
      "type": "object"
    },
    "citationCount": {
      "description": "Max across sources; null when no source reports counts (arXiv/PubMed-only hits)",
      "type": [
        "integer",
        "null"
      ]
    },
    "citationsPerYear": {
      "description": "citationCount / years since publication; null with citationCount",
      "type": [
        "number",
        "null"
      ]
    },
    "coverage": {
      "properties": {
        "complete": {
          "type": "boolean"
        },
        "missing": {
          "description": "Sources that failed, timed out or were skipped",
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        "retry": {
          "description": "true when a requested source failed (not merely skipped)",
          "type": "boolean"
        }
      },
      "required": [
        "complete",
        "missing",
        "retry"
      ],
      "type": "object"
    },
    "doi": {
      "description": "Lowercase, no doi.org prefix; empty if none",
      "type": "string"
    },
    "id": {
      "description": "DOI, or arxiv:<id> / pmid:<id> when the paper has no DOI",
      "type": "string"
    },
    "is_retracted": {
      "description": "From OpenAlex; false if OpenAlex did not match",
      "type": "boolean"
    },
    "note": {
      "description": "Present only when no source matched",
      "type": "string"
    },
    "oa_status": {
      "enum": [
        "gold",
        "green",
        "hybrid",
        "bronze",
        "closed",
        "unknown"
      ],
      "type": "string"
    },
    "pdfUrl": {
      "description": "Only when the full text is really open",
      "type": [
        "string",
        "null"
      ]
    },
    "title": {
      "type": "string"
    },
    "tldr": {
      "description": "Semantic Scholar TLDR; empty if unavailable",
      "type": "string"
    },
    "type": {
      "enum": [
        "journal-article",
        "preprint",
        "review",
        "book-chapter",
        "other"
      ],
      "type": "string"
    },
    "url": {
      "description": "doi.org, arxiv.org or pubmed landing page",
      "type": "string"
    },
    "venue": {
      "description": "Empty if unknown",
      "type": "string"
    },
    "year": {
      "description": "0 if unknown",
      "type": "integer"
    }
  },
  "required": [
    "id",
    "title",
    "authors",
    "year",
    "venue",
    "abstract",
    "tldr",
    "doi",
    "citationCount",
    "citationsPerYear",
    "is_retracted",
    "type",
    "oa_status",
    "pdfUrl",
    "url",
    "citation",
    "coverage"
  ],
  "type": "object"
}