Crossref Research Monitor — DOI, Journals & Citations

Enter a research topic. Export DOI records with title, publisher, journal, publication date and citation counts. Filter dates and work types, and monitor new or changed metadata.

No source API key or external AI subscription is required. Export results as JSON, CSV or Excel; JSON keeps nested fields intact.

Start with a working example

{
  "query": "machine learning",
  "maxResults": 3,
  "maxPages": 1
}

Supported scope

Crossref bibliographic metadata only: no full texts, abstracts, author profiles or PDF downloads. Counts and dates are publisher-deposited and may be incomplete. Date precision is preserved. Up to 10 pages, 50 records per page; cursor pagination and DOI deduplication. Search relevance is not an endorsement or proof of research quality.

Source documentation: https://www.crossref.org/documentation/retrieve-metadata/rest-api/

Real output example

The following values came from a real test run; values may change.

doi	title	publisher	publishedDate	citationCount	url
10.1067/msy.2099.99951b	Learning sentinel node biopsy: Results of a prospective randomized trial of two techniques	Elsevier BV	1999-10	5	https://doi.org/10.1067/msy.2099.99951b
10.1067/men.2001.113061	ED learning units: An innovative teaching method	Elsevier BV	2001-04	1	https://doi.org/10.1067/men.2001.113061

Pricing

$1 per 1,000 delivered DOI record records, plus $0.001 per run start at 512 MB–1 GB. Native Apify pay-per-event; one result event per successfully delivered row, with no separate automatic dataset-row event. Empty runs still have a start charge. Platform terms and the pricing tab apply. Set Maximum cost per run as well as maxResults. Failed sources do not produce billed error rows.

Monitoring and limits

Set onlyChanges: true and a stateStoreName such as crossref-monitor-state. First run emits NEW; later runs skip unchanged records and emit UPDATED for changes. Use a distinct store for each monitor, and do not overlap runs sharing the same state. State retains up to 10,000 recent fingerprints; evicted records can appear NEW again. No deletions are inferred from incomplete pages. Only successfully delivered results update state.

maxResults caps delivered rows; unchanged rows can still require source requests. maxPages, source list limits, maxRequests (up to 300), a 240-second processing deadline, and a 40 MB download budget bound work. RUN_REPORT shows counts, errors, unchanged skips and truncation warnings. PARTIAL means some sources failed; successful empty searches and unchanged monitors can return zero rows. Access restrictions and rate limits are reported, not bypassed.

This Actor only reads public data. It does not install packages, execute external code, send customer messages or create schedules. You can save an Apify Task and schedule it yourself. Not affiliated with or endorsed by the source platform.

عربي

أدخل المصادر أو الكلمات المطلوبة، وحدد عدد النتائج وحد الصرف. تحصل على بيانات فعلية قابلة للتصدير. خيار «التغييرات فقط» يقارن بالتشغيل السابق ضمن سجل تسميه أنت. المعلومات غير المتاحة تبقى فارغة؛ ما نختلق بيانات. لا يوجد ضمان دخل أو نتائج بحث شاملة.