Academic Paper Search
Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by…
| Host | api.kadec0.xyz |
|---|---|
| Price | $0.005–$0.15 per call |
| Network | Base |
| Paid endpoints listed | 43 |
| Calls, last 30 days* | 3,273 |
| Most unique payers on one endpoint (30 days)* | 10 |
| Last paid call* | 2026-10-18 |
| Tags | government, crypto, google-trends, trends, search, web-search, serp, keyword-research |
* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.
Endpoints
| URL | Method | Price |
|---|---|---|
https://api.kadec0.xyz/v1/papersAcademic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed,… | GET | $0.02 |
https://api.kadec0.xyz/v1/trendGoogle Trends interest over time for a keyword. Returns Google Trends search interest as a dated series indexed 0-100:… | GET | $0.05 |
https://api.kadec0.xyz/v1/domain-infoDomain WHOIS and DNS lookup. Registrar, creation and expiry dates, nameservers, and full DNS records (A, AAAA, MX, NS,… | GET | $0.02 |
https://api.kadec0.xyz/v1/serpWeb search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query — with… | GET | $0.05 |
https://api.kadec0.xyz/v1/whois-bulkBulk WHOIS lookup. Registrar, dates, and nameservers for up to 10 domains in a single batch call. | GET | $0.05 |
https://api.kadec0.xyz/v1/smart-searchSmart, auto-routed research paper search. A broad field term is grounded against the OpenAlex taxonomy and returned as… | GET | $0.02 |
https://api.kadec0.xyz/v1/hackernewsHacker News feed. Top, new, and best front-page stories plus full-text story search — titles, scores, comment counts,… | GET | $0.01 |
https://api.kadec0.xyz/v1/congress-tradesUS congressional stock trades. Stock transactions disclosed by members of the House and Senate under the STOCK Act —… | GET | $0.05 |
https://api.kadec0.xyz/v1/geocodeGeocoding and reverse geocoding. Converts an address or place name to latitude/longitude, or coordinates back to an… | GET | $0.01 |
https://api.kadec0.xyz/v1/email-validateEmail validation and email list cleaning. Checks each email address for RFC syntax, a live MX record lookup returning… | GET | $0.03 |
https://api.kadec0.xyz/v1/weatherWeather forecast and air quality for any location worldwide. Returns current conditions plus a 16-day daily weather… | GET | $0.005 |
https://api.kadec0.xyz/v1/githubGitHub data. Repository stats, user profiles, and code-search results (stars, forks, language, topics, issues) via the… | GET | $0.02 |
https://api.kadec0.xyz/v1/related-queriesGoogle Trends related queries for a keyword. Returns the searches people run alongside a keyword in a given country:… | GET | $0.03 |
https://api.kadec0.xyz/v1/related-papersLiterature review and related-paper discovery. Given a seed paper (arXiv id, DOI, or OpenAlex id) or a topic query,… | GET | $0.03 |
https://api.kadec0.xyz/v1/serp-readWeb search plus page reading in one call: answer with sources. Runs a web search, scrapes the top results, and returns… | GET | $0.08 |
https://api.kadec0.xyz/v1/market-sentimentMarket fear & greed index. Aggregated investor sentiment from CNN Fear & Greed, the crypto Fear & Greed index, and the… | GET | $0.05 |
https://api.kadec0.xyz/v1/interest-by-regionGoogle Trends interest by region for a keyword. Returns the subregional breakdown of Google Trends search interest… | GET | $0.03 |
https://api.kadec0.xyz/v1/serp-batchBulk web search: up to 5 search queries in a single call, each returning ranked title, URL, and snippet, with the same… | GET | $0.10 |
https://api.kadec0.xyz/v1/token-priceCrypto token price and market data. Returns the live price of one or many tokens by coin id or ticker symbol, in a… | GET | $0.01 |
https://api.kadec0.xyz/v1/website-auditInstant website SEO audit. On-page SEO, performance, and accessibility snapshot for any URL — title, meta tags,… | GET | $0.08 |
https://api.kadec0.xyz/v1/paper-detailsCitation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references… | GET | $0.03 |
https://api.kadec0.xyz/v1/trending-coinsTrending crypto coins. The coins most searched on CoinGecko right now, with rank, price, and market-cap rank. | GET | $0.01 |
https://api.kadec0.xyz/v1/cveCVE vulnerability lookup. Returns security vulnerability records by CVE id or keyword from the NIST National… | GET | $0.01 |
https://api.kadec0.xyz/v1/defi-tvlDeFi TVL for protocols and chains. Returns total value locked per DeFi protocol or per chain via DefiLlama, with… | GET | $0.02 |
https://api.kadec0.xyz/v1/permitsBuilding permit records. Construction and building permits across Chicago, NYC, Seattle, and San Francisco — type,… | GET | $0.03 |
Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.
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