api.kadec0.xyz publishes 36 machine-payable endpoints over the x402 protocol, priced from $0.005 to $0.15 per call. Each was probed directly; the response code below is what it returned.
| Endpoint | Method | Price | Probe |
|---|---|---|---|
| /v1/author-search | GET | $0.02 | 402 |
| /v1/congress-trades | GET | $0.05 | 402 |
| /v1/cve | GET | $0.01 | 402 |
| /v1/defi-tvl | GET | $0.02 | 402 |
| /v1/dns-propagation | GET | $0.03 | 402 |
| /v1/domain-info | GET | $0.02 | 402 |
| /v1/email-validate | GET | $0.03 | 402 |
| /v1/enrich | GET | $0.15 | 402 |
| /v1/fda | GET | $0.02 | 402 |
| /v1/geocode | GET | $0.01 | 402 |
| /v1/github | GET | $0.02 | 402 |
| /v1/hackernews | GET | $0.01 | 402 |
| /v1/lit-review | GET | $0.08 | 402 |
| /v1/market-sentiment | GET | $0.05 | 402 |
| /v1/paper-details | GET | $0.03 | 402 |
| /v1/paper-fulltext | GET | $0.04 | 402 |
| /v1/papers | GET | $0.02 | 402 |
| /v1/permits | GET | $0.03 | 402 |
| /v1/recalls | GET | $0.02 | 402 |
| /v1/related-papers | GET | $0.03 | 402 |
| /v1/scrape | GET | $0.03 | 402 |
| /v1/sec-edgar | GET | $0.05 | 402 |
| /v1/serp | GET | $0.03 | 200 |
| /v1/serp-batch | GET | $0.1 | 402 |
| /v1/serp-multi | GET | $0.05 | 402 |
| /v1/serp-read | GET | $0.08 | 402 |
| /v1/smart-search | GET | $0.02 | 402 |
| /v1/stablecoins | GET | $0.02 | 402 |
| /v1/stackoverflow | GET | $0.01 | 402 |
| /v1/time | GET | $0.005 | 402 |
| /v1/token-price | GET | $0.01 | 402 |
| /v1/topic-search | GET | $0.02 | 402 |
| /v1/usgs-quakes | GET | $0.005 | 402 |
| /v1/weather | GET | $0.005 | 402 |
| /v1/website-audit | GET | $0.08 | 402 |
| /v1/yield-pools | GET | $0.03 | 402 |
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…
US congressional stock trades. Stock transactions disclosed by members of the House and Senate under the STOCK Act — politician, ticker, amount, and date.
CVE vulnerability lookup. Security vulnerability and advisory records from NIST NVD and GitHub Security Advisories — CVSS score, severity, CWEs, and references.
DeFi TVL and protocol data. Total-value-locked for DeFi protocols and chains via DefiLlama — TVL, category, chains, and change.
DNS propagation checker. Compares a DNS record across public resolvers (Google, Cloudflare, Quad9, OpenDNS) to spot propagation lag or split-horizon answers.
Domain WHOIS and DNS lookup. Registrar, creation and expiry dates, nameservers, and full DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain.
Email validation for lead lists and signup forms: RFC syntax check, live MX record lookup with the actual mail hosts, disposable-domain detection (8k+ known throwaway domains), role-account flag (info…
Company domain enrichment. Firmographics, tech-stack detection, social profiles, and metadata for a company domain — a keyless one-call enrichment gateway.
FDA recalls and adverse events. Drug, device, and food recall and adverse-event records from openFDA with classification, recalling firm, and reason.
Geocoding and reverse geocoding. Converts an address or place name to latitude/longitude, or coordinates back to an address.
GitHub data. Repository stats, user profiles, and code-search results (stars, forks, language, topics, issues) via the GitHub REST API.
Hacker News feed. Top, new, and best front-page stories plus full-text story search — titles, scores, comment counts, and author for tech and startup news.
Literature review map in one call. Give a seed paper (DOI, arXiv id, OpenAlex id, or PMID) or a topic query and get one structured result: the seed's references, its cited-by list (most-cited first), …
Market fear & greed index. Aggregated investor sentiment from CNN Fear & Greed, the crypto Fear & Greed index, and the VIX volatility gauge.
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 me…
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-a…
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 …
Building permit records. Construction and building permits across Chicago, NYC, Seattle, and San Francisco — type, status, address, cost, and issue date.
Consumer product recalls. A normalized multi-agency recall feed spanning FDA, CPSC, and NHTSA — product, reason, company, classification, and severity.
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 li…
Web page to clean markdown. Converts any URL into LLM-ready markdown plus structured metadata — a keyless alternative to Firecrawl.
SEC EDGAR filing search. Full-text search of SEC filings (10-K, 10-Q, 8-K and more) by company, ticker, CIK, or keyword — company, form type, date, and document link.
Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query — with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news m…
Bulk web search. Run up to 5 search queries in a single call and get ranked title, URL, and snippet per query — with the same locale, freshness, and news filters as the single-query search. One paid c…
Multi-engine metasearch. One query fanned out across 2-3 search engines (Brave, Yahoo, Yandex) with results deduplicated by URL and merged by reciprocal-rank fusion — consensus ranking across engines …