{"uid":"cap_SA_5tqRw9_L0QJEJs7186","slug":"arxiv-mcp-mtree-workers-dev-1fb948f8","name":"arXiv Paper Metadata Resolver by ID","description":"Resolve one or more arXiv papers by id. Accepts modern (\"2401.12345\", \"2401.12345v2\") and old-style (\"cs.CL/9912001\") ids; \"arXiv:\" prefix and full abs/pdf URLs are normalised. Returns full metadata: title, authors, abstract, categories, DOI, journal-ref, comment, abs URL, PDF URL.","url":"https://arxiv-mcp.mtree.workers.dev/v1/papers/by_id?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"id":{"type":"string","description":"Single arXiv id (e.g. \"2401.12345\"). Use either `id` or `ids`."},"ids":{"type":"string","description":"Comma-separated list of arXiv ids (max 50)."}}},"responseSchema":{"example":{"source":"export.arxiv.org/api","results":[{"id":"2401.12345","doi":"10.1234/example.5678","title":"Example paper","abs_url":"http://arxiv.org/abs/2401.12345v1","authors":["Ada Lovelace"],"comment":"10 pages, 4 figures","pdf_url":"http://arxiv.org/pdf/2401.12345v1","summary":"Abstract …","updated":"2024-02-01T12:00:00Z","arxiv_id":"2401.12345","published":"2024-01-23T18:00:00Z","categories":["cs.CL","cs.LG"],"journal_ref":"Example Journal 12 (2024) 345-360","primary_category":"cs.CL"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"unknown","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_00LhY8JLy6IZ_W_AEesMB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches full metadata for one or more arXiv papers given their IDs, returning title, authors, abstract, categories, DOI, journal reference, and PDF/abs URLs.","exampleAgentPrompt":"Can you pull up the full metadata for arXiv paper 2401.12345 — I need the title, authors, abstract, categories, and DOI?","exampleUseCases":[{"title":"Batch import research papers for literature review","prompt":"I have a list of arXiv IDs from a survey I'm writing. Can you fetch the title, abstract, and author list for all of them so I can organize them by category and see which ones are most relevant?"},{"title":"Verify preprint details before citation","prompt":"Before I cite this arXiv paper in my manuscript, can you grab the full metadata — especially the journal reference, DOI, and publication date — so I know if it's been officially published yet?"},{"title":"Extract author and subject info from paper links","prompt":"I found a few papers linked in a discussion but only have the PDF URLs. Can you resolve those to get me the author names, abstract, and primary category for each one?"}],"resultDescription":"Returns a JSON object with a results array; each entry contains the paper's arXiv ID, title, list of authors, abstract/summary, categories, primary category, DOI, journal reference, comment, abs URL, PDF URL, published date, and updated date.","failureModes":["Invalid or malformed arXiv ID returns no result or error","Paper ID not found on arXiv returns empty results array","More than 50 IDs submitted at once may be rejected","Network timeout from upstream arXiv export API","Old-style IDs (e.g. cs.CL/9912001) may occasionally fail to normalize correctly"],"whenToPreferThis":"Use this endpoint when you already know one or more arXiv IDs (or have arXiv URLs) and need structured, full metadata without running a text search. It is faster and more precise than a full-text search for known papers and handles ID normalization (strips 'arXiv:' prefix, full abs/pdf URLs) automatically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:32:53.789Z","isFirstParty":false,"canonicalSlug":"arxiv-mcp-mtree-workers-dev-1fb948f8"}