Science And Education x402 offerings

Radioactive decay calculator from initial amount, half-life and elapsed time - remaining amount and decay constant

Museum object record (Met or Art Institute of Chicago) - image, dimensions, credit line and description

Search The Met and Art Institute of Chicago together - title, artist, date, medium and public-domain status

Search the Protein Data Bank for 3D structures by free text - title, method, resolution and release date

Protein search across UniProtKB by name, function or gene - accession, organism, length and review status

Protein function lookup by UniProt accession or gene symbol - function, location, diseases, GO terms and structures

Protein Data Bank structure lookup by PDB id - method, resolution, chains, ligands, citation and files

Book search across 40M+ editions (Open Library) by keyword, author or subject, with ISBNs and covers

ISBN-10 and ISBN-13 lookup - title, authors, publisher, publish date, pages, subjects and cover image

Chemical compound lookup in PubChem by name, CAS, CID, SMILES or InChIKey - formula, weight, properties and GHS hazards

Lichess daily chess puzzle - FEN position, rating, themes and UCI solution moves

Dungeons & Dragons 5e SRD rules lookup - spells, monsters, classes, races, equipment and magic items

Search the D&D 5e SRD across spells, monsters, magic items, equipment, classes, races and conditions

Pokemon data - types, base stats, abilities, height, weight, generation, legendary status and Pokedex entry by name or number

Author profile - birth and death dates, top work, work count, subjects, bio and alternate names from Open Library

Recent preprint search on the Open Science Framework - title, abstract, DOI and link across PsyArXiv, SocArXiv and other servers

ITIS species taxonomy lookup - scientific name to taxonomic serial number, rank, full kingdom-to-species lineage, child taxa and common names in English and other languages

Physics paper search on INSPIRE-HEP - title, authors, citation count, arXiv id and DOI for high energy physics and astrophysics literature

NASA image and video library search - titles, descriptions, dates, keywords and thumbnails for Apollo, Hubble, Webb and other missions

UN Sustainable Development Goal indicators for a country - latest values and trends

English dictionary definitions by part of speech, with examples, pronunciation and word frequency

Asteroid and comet lookup (NASA/JPL SBDB) - hazard flags, size, orbit and next close approaches

Exoplanet lookup (NASA Exoplanet Archive) by planet or host star - discovery, orbit, size, mass and host star

Upcoming asteroid and comet close approaches to Earth (NASA CNEOS) - date, distance, velocity and size