Science And Education x402 offerings

Resolve one DOI into normalized open Crossref bibliographic, author, container, citation-count, license, identifier, and correction or retraction-link metadata without abstracts or full text.

Browse Internet Archive's Project Gutenberg mirror collection (gutenberg) as catalogued here: most downloaded items first, with year, creator, rights status and download links; add words to search within the collection. $0.01 per page of 20.

Browse Internet Archive's LibriVox audiobooks collection (librivoxaudio) as catalogued here: most downloaded items first, with year, creator, rights status and download links; add words to search within the collection. $0.01 per page of 20.

Fit positive rate-temperature observations by log-linear Arrhenius OLS; return activation energy, residuals and transformed-fit errors. No mechanism or extrapolation claim.

Two pay-per-call x402 endpoints for arXiv: papers/search ($0.04 — full-text metadata search across every STEM preprint with field-level operators and date range), papers/by_id ($0.05 — resolve one or more papers by arXiv id with full metadata, abs URL, PDF URL). No signup, no API key — pay USDC on Base.

Newest arXiv preprints on any topic, newest first: title, authors, categories, abstract, PDF link, published date. Track fresh AI, physics, math and CS research daily. $0.02 per search.

Use when you need a compact abstract card for an arXiv id without full affiliation/journal/comment fields: returns id, title, summary, author names only, primary category, published/updated, absUrl and pdfUrl. Same id rules as /v1/arxiv/paper.

Use when you have an arXiv id (new-style like 1706.03762 or with version 1706.03762v7, or old-style like hep-ex/0307015) and need its public metadata card: title, abstract/summary, authors with affiliations (emails removed), primary category, all categories, published and updated timestamps, author comment, journal reference, DOI, and abs/PDF URLs. Without a version suffix, arXiv returns the latest version.

Use when you need to discover arXiv e-prints by keyword, title, author or field query: pass any arXiv search_query string (e.g. "transformer attention", "au:vaswani", "ti:\"attention is all you need\"", "cat:cs.LG AND all:diffusion"). Returns up to 25 papers with id, title, summary, authors (names + affiliation without emails), primary category, categories, published/updated, comment, journal ref, DOI, abs and PDF URLs, plus totalResults for paging. Sort by relevance, lastUpdatedDate or submittedDate.

Use when you want the latest or relevance-ranked papers in one arXiv subject class: pass cat (e.g. cs.AI, quant-ph, stat.ML). Returns up to 25 papers with the same fields as search, plus totalResults for paging. Default sort is submittedDate descending (newest first).

Use when you want the latest or relevance-ranked papers in one arXiv subject class: pass cat (e.g. cs.AI, quant-ph, stat.ML). Returns up to 25 papers with the same fields as search, plus totalResults for paging. Default sort is submittedDate descending (newest first).

Use when you need a compact abstract card for an arXiv id without full affiliation/journal/comment fields: returns id, title, summary, author names only, primary category, published/updated, absUrl and pdfUrl. Same id rules as /v1/arxiv/paper.

Use when you need to discover arXiv e-prints by keyword, title, author or field query: pass any arXiv search_query string (e.g. "transformer attention", "au:vaswani", "ti:\"attention is all you need\"", "cat:cs.LG AND all:diffusion"). Returns up to 25 papers with id, title, summary, authors (names + affiliation without emails), primary category, categories, published/updated, comment, journal ref, DOI, abs and PDF URLs, plus totalResults for paging. Sort by relevance, lastUpdatedDate or submittedDate.

Use when you have an arXiv id (new-style like 1706.03762 or with version 1706.03762v7, or old-style like hep-ex/0307015) and need its public metadata card: title, abstract/summary, authors with affiliations (emails removed), primary category, all categories, published and updated timestamps, author comment, journal reference, DOI, and abs/PDF URLs. Without a version suffix, arXiv returns the latest version.

Transits: Transits to a natal chart at a moment, and exact hit times over a window of up to a year.

Panchang: Tithi, vara, nakshatra, yoga, karana with the exact time each ends, plus sunrise and sunset.

Complete Vedic report: Kundli + Vimshottari dashas + doshas + janma panchang in one call.

Aspects: Aspects (with orb, exactness, applying/separating) for a moment, or for any longitudes you supply.

Kundli (Vedic birth chart): Sidereal D1 + D9: lagna, 9 grahas with rashi, nakshatra, pada, house, dignity, combustion, bhavas.

Planetary positions: Tropical (or sidereal) longitudes, latitudes, speeds and retrograde flags of Sun..Pluto, nodes, Lilith.

Nakshatras: Sidereal nakshatra, pada and lord of every graha; janma nakshatra with gana, yoni, nadi, varna.

Birth time resolver: Local birth time + place -> exact UT, historical UTC offset, Delta T, Local Mean Time, true solar time.

Panchang: Tithi, vara, nakshatra, yoga, karana with the exact time each ends, plus sunrise and sunset.

Transits: Transits to a natal chart at a moment, and exact hit times over a window of up to a year.