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Papers Search

by 2s in Search & web

x402 APIPassing, checked 3 h ago

Unified scientific literature search across arXiv (preprints), PubMed (biomedical), and Semantic Scholar (cross-field, with citation counts). Returns a flat array of papers with stable schema: source, sourceId, doi, title, authors, abstract, year, publishedAt, citationCount, url, pdfUrl. Partial failures surface in the errors array rather than failing the whole call. Optional filters: since (YYYY-MM-DD), sources (subset), limit (max 20 per source).

GET https://2s.io/api/papers/search

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
182 ms typical, 182 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://2s.io/api/papers/search?limit=10&q=example&since=2024-01-01&sources=example"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F2s.io%2Fapi%2Fpapers%2Fsearch
const res = await pay("https://2s.io/api/papers/search?limit=10&q=example&since=2024-01-01&sources=example");
console.log(await res.json());

Example input

{
  "limit": 10,
  "q": "example",
  "since": "2024-01-01",
  "sources": "example"
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402182 ms$0.006
8 h agoPassed402223 ms$0.006