api.kadec0.xyz
API aggregates academic paper search, geocoding, market sentiment indices, and researcher profiles across multiple data sources.
Trust signal
4 of 4 pillars
coverage 100%
Pillars
Signals
Evidence tiers, not an endorsement · trust model v0.1.0 (provisional) · CDP-lane settlement only (D3) · Trust API coming soon
On-chain traction
ERC-8004 agent registry
Not found in the ERC-8004 agent registry. This is the default state — absence is not a negative signal.
Identity & classification
Settlement volume
USDC settled on-chain · monthly
as of Jul 12, 2026
Endpoints(33)
Realtime earthquakes via USGS FDSNWS (keyless). params: minmagnitude, starttime, endtime, latitude+longitude+maxradiuskm
Current weather + 16-day forecast + air quality via Open-Meteo. params: lat, lng, forecast_days
CVE/vuln lookup via NVD + GitHub advisories. params: cve_id|keyword, severity, source
Ethereum gas price estimates (EIP-1559, 5 confidence tiers) via Blocknative. no params
Address<->lat/lng via Nominatim. params: q (forward) or lat+lon (reverse)
Hacker News stories/search. params: mode=search|top|new|best
USDA FoodData Central nutrition lookup. params: query, dataType, pageSize
Stack Overflow Q&A via StackExchange API. params: mode=search|question
Crypto token price + market data via CoinGecko (keyless). params: ids (CoinGecko coin ids), vs
Trending crypto coins right now via CoinGecko. params: maxItems (cap 15)
Author and researcher profile search. An author name returns matching researchers with current affiliation, publication count, total citations, h-index and i10-index, and their most-cited papers — for author lookup, disambiguation, and citation-metrics. Keyless via OpenAlex.
DeFi protocol/chain TVL via DefiLlama (keyless). params: mode=protocols|chains, q, category, chain, maxItems
WHOIS + DNS records for a domain. params: domain
FDA adverse events + recalls via OpenFDA (keyless). params: type=drug|device|food, report=recall|event, search
GitHub repos/users/search via REST API. params: mode=repo|search|user
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 keyword or restrict to a single source (arxiv search, pubmed search, crossref, openalex, semantic scholar); filter by year range; sort by relevance, recency, or citations. Keyless.
Multi-agency recall feed (FDA+CPSC+NHTSA, normalized). params: q, agency=fda|cpsc|nhtsa|all, limit
Stablecoin circulating supply across chains via DefiLlama. params: q, pegType, mechanism, maxItems
Check a DNS record across public resolvers (google/cloudflare/quad9/opendns). params: domain, record_type
Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count — for bibliography building and citation-graph traversal. Keyless via OpenAlex and Semantic Scholar.
Building/construction permits across chicago/nyc/seattle/sf (Socrata). params: city, permit_type, date_range, address
Literature review and related-paper discovery. Given a seed paper (arXiv id, DOI, or OpenAlex id) or a topic query, returns semantically similar and recommended scholarly papers to expand a reading list or systematic review, via Semantic Scholar recommendations with an OpenAlex related-works fallback. Keyless.
URL -> clean markdown + structured data (Firecrawl alt). params: url, maxChars
Keyless web search (DuckDuckGo). params: q, num_results -> title/url/snippet
Top DeFi yield/APY pools via DefiLlama. params: chain, project, symbol, stablecoin, minTvl, minApy, maxItems
YouTube video metadata + best-effort transcript (keyless). params: video_id|url
Full text and open-access PDF retrieval for a paper. Given an arXiv id, DOI, OpenAlex id, PMID, or PMCID, returns the readable body split into sections (introduction, methods, results) plus the open-access PDF location: arXiv via ar5iv, biomedical via Europe PMC, OA locations via OpenAlex for the rest. The 'now read it' call after a paper search. Keyless.
US congressional stock trades (House+Senate, STOCK Act). params: politician, ticker, chamber, dateRange, type
Aggregated market fear/greed: CNN F&G + crypto F&G + VIX. params: asset_class=crypto|stocks|all
SEC EDGAR filings full-text search (keyless). params: q|company|cik, type, dateRange
Batch WHOIS for up to 10 domains in one call. params: domains (comma list)
Instant SEO/perf/a11y audit of a URL. params: url
Keyless company enrichment: DNS + socials + tech stack + meta. params: domain