{"service":"kadec0 Research API — citations, cited-by, lit-review & paper search","protocol":"x402","network":"eip155:8453","payTo":"0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA","facilitator":"https://facilitator.xpay.sh","endpoints":{"/v1/lit-review":{"price":"$0.08","method":"GET","description":"One-call literature map: seed paper + references + cited-by + related work, deduped into one structured result (composes papers+paper-details+related-papers). params: q OR id|doi, maxItems"},"/v1/paper-details":{"price":"$0.03","method":"GET","description":"Full paper metadata + references + cited-by for one paper. params: id|doi (arXiv id, DOI, OpenAlex id, or PMID)"},"/v1/related-papers":{"price":"$0.03","method":"GET","description":"Semantically related / recommended papers for a paper id/DOI or a query (Semantic Scholar recs + OpenAlex related_works). params: id|doi OR q, maxItems"},"/v1/author-search":{"price":"$0.02","method":"GET","description":"Author lookup: matching authors with affiliation, works count, citations, h-index, and top papers (OpenAlex). params: name, maxItems, top_works"},"/v1/papers":{"price":"$0.02","method":"GET","description":"Unified academic search across arXiv+PubMed+OpenAlex+Crossref+Semantic Scholar (deduped). params: q, source, maxItems, year_from, year_to, sort"},"/v1/paper-fulltext":{"price":"$0.04","method":"GET","description":"Readable full text / section breakdown of a paper where open-access (ar5iv + Europe PMC + OpenAlex OA locations). params: id|doi (arXiv id, DOI, OpenAlex id, PMID, or PMCID)"},"/v1/market-sentiment":{"price":"$0.05","method":"GET","description":"Aggregated market fear/greed: CNN F&G + crypto F&G + VIX. params: asset_class=crypto|stocks|all"},"/v1/github":{"price":"$0.02","method":"GET","description":"GitHub repos/users/search via REST API. params: mode=repo|search|user"},"/v1/hackernews":{"price":"$0.01","method":"GET","description":"Hacker News stories/search. params: mode=search|top|new|best"},"/v1/stackoverflow":{"price":"$0.01","method":"GET","description":"Stack Overflow Q&A via StackExchange API. params: mode=search|question"},"/v1/website-audit":{"price":"$0.08","method":"GET","description":"Instant SEO/perf/a11y audit of a URL. params: url"},"/v1/domain-info":{"price":"$0.02","method":"GET","description":"WHOIS + DNS records for a domain. params: domain"},"/v1/whois-bulk":{"price":"$0.05","method":"GET","description":"Batch WHOIS for up to 10 domains in one call. params: domains (comma list)"},"/v1/dns-propagation":{"price":"$0.03","method":"GET","description":"Check a DNS record across public resolvers (google/cloudflare/quad9/opendns). params: domain, record_type"},"/v1/enrich":{"price":"$0.15","method":"GET","description":"Keyless company enrichment: DNS + socials + tech stack + meta. params: domain"},"/v1/weather":{"price":"$0.005","method":"GET","description":"Current weather + 16-day forecast + air quality via Open-Meteo. params: lat, lng, forecast_days"},"/v1/cve":{"price":"$0.01","method":"GET","description":"CVE/vuln lookup via NVD + GitHub advisories. params: cve_id|keyword, severity, source"},"/v1/usgs-quakes":{"price":"$0.005","method":"GET","description":"Realtime earthquakes via USGS FDSNWS (keyless). params: minmagnitude, starttime, endtime, latitude+longitude+maxradiuskm"},"/v1/fda":{"price":"$0.02","method":"GET","description":"FDA adverse events + recalls via OpenFDA (keyless). params: type=drug|device|food, report=recall|event, search"},"/v1/nutrition":{"price":"$0.01","method":"GET","description":"USDA FoodData Central nutrition lookup. params: query, dataType, pageSize"},"/v1/youtube":{"price":"$0.03","method":"GET","description":"YouTube video metadata + best-effort transcript (keyless). params: video_id|url"},"/v1/recalls":{"price":"$0.02","method":"GET","description":"Multi-agency recall feed (FDA+CPSC+NHTSA, normalized). params: q, agency=fda|cpsc|nhtsa|all, limit"},"/v1/permits":{"price":"$0.03","method":"GET","description":"Building/construction permits across chicago/nyc/seattle/sf (Socrata). params: city, permit_type, date_range, address"},"/v1/twitter":{"price":"$0.05","method":"GET","description":"X/Twitter reads via browser. params: mode=search|user|trends"},"/v1/scrape":{"price":"$0.03","method":"GET","description":"URL -> clean markdown + structured data (Firecrawl alt). params: url, maxChars"},"/v1/sec-edgar":{"price":"$0.05","method":"GET","description":"SEC EDGAR filings full-text search (keyless). params: q|company|cik, type, dateRange"},"/v1/geocode":{"price":"$0.01","method":"GET","description":"Address<->lat/lng via Nominatim. params: q (forward) or lat+lon (reverse)"},"/v1/congress-trades":{"price":"$0.05","method":"GET","description":"US congressional stock trades (House+Senate, STOCK Act). params: politician, ticker, chamber, dateRange, type"},"/v1/serp":{"price":"$0.03","method":"GET","description":"Keyless web search (multi-backend). params: q, num_results, region, timelimit, safesearch, page, mode=web|news -> title/url/snippet"},"/v1/serp-read":{"price":"$0.08","method":"GET","description":"Web search + read the top results in one call. params: q, fetch_top (<=5), maxChars + serp params -> ranked results + per-URL markdown extracts"},"/v1/serp-batch":{"price":"$0.10","method":"GET","description":"Up to 5 web searches in one call. params: queries ('|'-separated), num_results, region, timelimit, safesearch, mode, engine"},"/v1/serp-multi":{"price":"$0.05","method":"GET","description":"Union web search across 2-3 engines (brave/yahoo/yandex), deduped + rank-fused. params: q, engines, num_results, region, timelimit, safesearch, mode"},"/v1/defi-tvl":{"price":"$0.02","method":"GET","description":"DeFi protocol/chain TVL via DefiLlama (keyless). params: mode=protocols|chains, q, category, chain, maxItems"},"/v1/stablecoins":{"price":"$0.02","method":"GET","description":"Stablecoin circulating supply across chains via DefiLlama. params: q, pegType, mechanism, maxItems"},"/v1/yield-pools":{"price":"$0.03","method":"GET","description":"Top DeFi yield/APY pools via DefiLlama. params: chain, project, symbol, stablecoin, minTvl, minApy, maxItems"},"/v1/token-price":{"price":"$0.01","method":"GET","description":"Crypto token price + market data via CoinPaprika (keyless). params: ids (coin ids or symbols, e.g. bitcoin,ethereum or btc,eth)"},"/v1/trending-coins":{"price":"$0.01","method":"GET","description":"Trending crypto coins right now via CoinGecko. params: maxItems (cap 15)"},"/v1/gas-oracle":{"price":"$0.01","method":"GET","description":"Ethereum gas price estimates (EIP-1559, 5 confidence tiers) via Blocknative. no params"},"/v1/topic-search":{"price":"$0.02","method":"GET","description":"Field/topic search: ground a broad term against the OpenAlex taxonomy and return a coherent seed cluster (top-cited + recent-influential works in the matched field). params: q, maxItems"},"/v1/smart-search":{"price":"$0.02","method":"GET","description":"Auto-routed research search: broad terms -> taxonomy-grounded field cluster; questions/long queries -> hybrid OpenAlex+Semantic Scholar fusion with SPECTER2 rerank. params: q, maxItems, rerank"}},"usage":"GET /v1/<name>?<params>. Pay via x402 (X-Payment header). USDC on Base."}