Macaroon research paper search
Source-linked scientific paper metadata by topic. POST /execute/polymathica-research-paper-search-v1 returns records with title, DOI, source URL, licence state and provenance, plus a falsifiable acceptance predicate on the response. $0.001 USDC per call on Base, no API key. Scope, verified by a paid call: this is a small pre-indexed corpus, not a live Crossref search. The endpoint reports no_outbound_network_on_purchase true and a retrieval_date of 2026-08-14, so results are served from a static index built on that date. Our paid call for "CRISPR base editing" returned 2 records, and both were the same SSRN preprint pair, against the 398,541 works Crossref lists for that query. Metadata only: no paper text and no reuse rights are supplied.
x402 verified · Verified on /execute/polymathica-research-paper-search-v1 · $0.001 · $0.001 USDC/request · 1 endpoints · Data · base network · x402 protocol
How to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.