{"slug":"2s-io-api-papers-search-9a0b71","title":"Unified scientific literature search across arXiv (preprints), PubMed (biomedica","host":"2s.io","method":"GET","resource":"https://2s.io/api/papers/search","category":"search","description":"Unified scientific literature search across arXiv (preprints), PubMed (biomedical), and Semantic Scholar (cross-field, with citation counts). Returns a flat array of papers with stable schema: source, sourceId, doi, title, authors, abstract, year, publishedAt, citationCount, url, pdfUrl. Partial fai","price_listed":0.006,"price_asked":0.006,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":263,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"limit":10,"q":"example","since":"2024-01-01","sources":"example"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"properties":{"method":{"const":"GET"},"queryParams":{"additionalProperties":false,"properties":{"limit":{"default":10,"maximum":20,"minimum":1,"type":"integer"},"q":{"maxLength":500,"minLength":1,"type":"string"},"since":{"type":"string"},"sources":{"type":"string"}},"required":["q"],"type":"object"},"type":{"const":"http"}},"required":["type","method","queryParams"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.006,"price_match":true,"latency_ms":263,"error":null}],"description_full":"Unified scientific literature search across arXiv (preprints), PubMed (biomedical), and Semantic Scholar (cross-field, with citation counts). Returns a flat array of papers with stable schema: source, sourceId, doi, title, authors, abstract, year, publishedAt, citationCount, url, pdfUrl. Partial failures surface in the errors array rather than failing the whole call. Optional filters: since (YYYY-MM-DD), sources (subset), limit (max 20 per source).","last_updated":"2026-09-19T15:59:57.649Z","schemes":["exact"]}