Browse indexable science and education x402 offerings, including provider, method, and service details.
1729 indexable offerings in this category.
Search academic literature across OpenAlex, Crossref and arXiv in one call: title, authors, year, venue, DOI, citation count, abstract and a DIRECT open-access PDF link where one exists. Deduplicated…
Search academic literature across OpenAlex, Crossref and arXiv in one call: title, authors, year, venue, DOI, citation count, abstract and a DIRECT open-access PDF link where one exists. Deduplicated across sources, filterable by year and open-access, optional BibTeX per paper. One request replaces three APIs.
Google Scholar search (papers with citation counts) for AI agents at $0.020 per call, from the same Serper.dev source as /web/search. Send a query, get back compact JSON: top papers with position, ti…
Paper by DOI: title, year, authors, venue, citation count, open-access URL and the abstract where OpenAlex holds it (CC0 data). Use when you need to answer: What is the paper behind this DOI? The DOI goes in the path as written, slash included: /api/paper/10.1038/nature14539.
Verify references before you publish or rely on them: up to 10 citations per call, as reference strings in any style, DOIs, or {title, authors, year, doi}. For each: status verified, mismatch (the wo…
Search scientific papers across OpenAlex (250M works, all fields), arXiv (preprints) and PubMed (biomedicine) in one call. Returns title, up to 5 authors, year, venue, DOI, landing URL, open-access P…
Recommends age-appropriate books for a reader.
Computes the observed germination rate and a Wilson score interval from germinated and tested counts using a supplied normal critical value. It does not correct sampling bias, test vigor, identify disease or predict field emergence.
Quiz From Text: Answers Quoted From the Passage — Writes a fixed number of quiz questions from a passage you give it, as JSON, where every answer is a span copied word for word from the passage, with the same digits or number words, spacing, dashes, apostrophes and capitals, paired with the full sentence it comes from, and never a paraphrase, a pronoun, a computed value or a fact from outside the text. Questions are in the passage's own language, each asks for a different fact, a negation or a …
Great-circle angles for bounded caller-supplied right ascension and declination pairs in integer microdegrees; no ephemeris lookup. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for 90 days. Existing live route unchanged.
Search open Crossref bibliographic metadata by title, author, DOI fragment, or citation and return bounded normalized publication, author, citation, license, and update metadata without abstracts or full text.
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.
Fetch one federal R&D award as a normalized record with its full abstract. Give the award identifier and its source (NIH project number, NSF award id, or SBIR award) and get the title, complete abstract, agency, amount, dates, principal investigators, organization and technology terms, plus for NIH the linked publication PubMed ids. Cheap single-record pull.
Academic letter grade with red-pen marginalia for anything. $0.01 USDC.
Chinese character five elements, hanzi wuxing, 汉字五行, 字五行, character element attribute, metal wood water fire earth for hanzi, Chinese naming, 中国起名, Chinese name analysis Five Elements, Chinese baby naming Feng Shui. Determine Five Elements (Wu Xing) attribute of each Chinese character. Used in Chinese naming consultations and Feng Shui. Accepts payment on Base or Solana — either network works.
Deepent Research — refusal-free LLM inference (per-request)
Prime factorization. Use when agents need factorization for puzzles, crypto teaching, or ratio breakdowns (bounded n). Returns the factor list as structured JSON. $0.001 USDC per successful call via …
Reliability diagram points (mean forecast vs hit rate per bin). Call when plotting calibration without a notebook stack. Returns bins with mean_forecast and hit_rate as deterministic JSON for $0.001 …
Factorial (n≤20). Call for combinatorics demos and small counting problems with an explicit n cap. Returns n! for n up to 20; larger n returns a structured error. $0.001 USDC per successful call via …
Primality check. Call for teaching demos, ID heuristics, or lightweight number filters (bounded integers). Returns whether n is prime with a clear boolean field. $0.001 USDC per successful call via x…
Nth Fibonacci (n≤78). Use for sequences, demos, or test fixtures without shipping a math package. Returns F(n) for n up to 78 with a structured receipt. $0.001 USDC per successful call via x402 on Ba…
Find source-linked scientific papers by topic. Returns metadata pointers, authors, dates, licence evidence when supplied by the source, and corpus provenance; it does not sell paper text or infer reu…
Compare a bounded passage in the public-domain BSB and WEB without blending or interpreting the source texts.
Return a bounded, source-labelled set of public-domain Bible passages and neutral reflection prompts for one of six predefined topics.