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    "title": "Crossref Scraper — 150M+ Papers, DOIs & Citations",
    "description": "Search Crossref for journal articles, preprints, book chapters and datasets by keyword or journal ISSN. Each row holds the DOI, title, authors, journal, publisher, type, publication date and citation count, plus subjects, ISSN and abstract where the publisher deposited them. $1.00 per 1,000 works.",
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            "type": "string",
            "description": "Keywords to search Crossref for across titles, authors, abstracts, and metadata (e.g. \"deep learning\", \"CRISPR gene editing\", \"climate change adaptation\"). It can be left empty only when you give a journal ISSN below."
          },
          "fromDate": {
            "title": "Published from date",
            "type": "string",
            "description": "Only return works published on or after this date, in YYYY-MM-DD format (e.g. 2020-01-01). Leave empty for no date floor.",
            "default": ""
          },
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            "title": "Work type filter",
            "enum": [
              "",
              "journal-article",
              "proceedings-article",
              "book-chapter",
              "book",
              "posted-content",
              "dataset",
              "report",
              "dissertation",
              "monograph"
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            "description": "Only return works of this Crossref type. Leave empty for all types. \"journal-article\" is the most common for research papers.",
            "default": ""
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            "maxItems": 50,
            "type": "array",
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            "items": {
              "type": "string"
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          },
          "sort": {
            "title": "Sort order",
            "enum": [
              "relevance",
              "is-referenced-by-count",
              "published"
            ],
            "type": "string",
            "description": "How to order results. \"Relevance\" matches the query best; \"Most cited\" surfaces influential papers; \"Newest first\" sorts by publication date descending and stops at 10,000 works.",
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          "maxItems": {
            "title": "Max works",
            "minimum": 1,
            "maximum": 20000,
            "type": "integer",
            "description": "Maximum number of scholarly works to return. Uses deep cursor pagination to fetch beyond 100 reliably.",
            "default": 100
          },
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            "type": "string",
            "description": "Optional. Write each result as a page into your Notion when the run finishes. Authorize a Notion connector once in Settings → API & Integrations → MCP connectors, then pick it here. Leave empty to skip (default), results are always saved to the dataset regardless."
          },
          "notionParentId": {
            "title": "Notion target data source ID",
            "type": "string",
            "description": "Optional. The Notion data source ID of the database to write into (only used if a Notion connector is set). Leave empty to create the pages privately in your workspace instead."
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            "type": "object",
            "description": "Optional, and not needed for a normal run.",
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              "useApifyProxy": false
            }
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        }
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                "type": "string",
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                    "type": "integer",
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