{"beta":true,"receipt":{"kind":"unpaid_probe","ts":"2026-10-27T10:32:24Z","host":"papers.use.x402atlas.com","url":"https://papers.use.x402atlas.com/paper","method":"GET","status":402,"latency_ms":843,"error":null,"req_sha256":"da19ee1203b57fc1ead41f539a8bad0498a1a89300e49dd55f726a49ae1d4c4f","resp_sha256":"ccb374dd2ad9c9af3c9029041b1391024b888e909920adb865b544290a1b1b8c","total_header_bytes":8879,"prober_ua":"BotsRated-probe/0.3 (unpaid check; no payment sent; +https://botsrated.com/disputes)","prober":"botsrated-prober (Cloudflare cron)","probe_version":"0.3","scope":"primary","x402_version":2,"payment_required_header_bytes":8548,"valid_402":true,"live_amount":"5000","live_payTo":"0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2","live_asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","live_network":"eip155:8453","checks":{"terms_consistent":true,"terms_issues":[],"options":4,"base_usdc":true,"payto_stable":true},"resource_description":"Scientific paper lookup by DOI, arXiv id or PMID: full abstract, Semantic Scholar TLDR, ready-to-paste BibTeX and APA citations, citation counts, retraction flag, paper type, open-access PDF link. Merged from OpenAlex, Crossref, arXiv, PubMed and Semantic Scholar. Use to cite a known paper or expan…","extensions_advertised":["bazaar"],"payment_identifier":{"advertised":false,"required":false},"id":"c2f1e4989bf2b0dff01f","sig":{"alg":"ed25519","key_id":"botsrated-prober-1","signed":"canonical JSON of this receipt without the sig field (keys sorted, no whitespace)","sig_b64":"16/oBNu8Js9TmviBct7Ovx+0tNmednURq3G2wgQA8kD52M1JCKQfnMIz7vNkuo/8+f4DNY20jm8jdIcA2li0BQ=="},"receipt_url":"https://botsrated.com/receipt/c2f1e4989bf2b0dff01f?host=papers.use.x402atlas.com&day=2026-10-27","tx_url":null,"payment":"none (unpaid probe; no payment header was sent)","signature":"ed25519 per-receipt signature (key botsrated-prober-1; see /.well-known/botsrated-key)"},"stored_in":"D1"}