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 mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex).
curl -i -X GET https://api.kadec0.xyz/v1/serp # It answers 402 Payment Required, with the price and where to pay. # Pay with any x402 client, then send the same request again.
Uptime, grade and call counts come from other directories, not from us. A blank means nobody has measured it. It does not mean it is safe.
Literature Review Map · api.kadec0.xyz
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), and semantically related work, deduplicated into one uniform table with title, authors, year, venue, DOI, and citation count. Collapses search, citation lookup, and related-paper discovery into a single call. Keyless.
Smart Research Search · api.kadec0.xyz
Smart, auto-routed research paper search. A broad field term is grounded against the OpenAlex taxonomy and returned as a coherent field cluster; a natural-language question runs hybrid retrieval over OpenAlex and Semantic Scholar with reciprocal rank fusion and a SPECTER2 embedding rerank. The response exposes the routing decision, and each paper carries title, authors, year, venue, citation count, DOI, and a relevance score. Keyless.
Field & Topic Search · api.kadec0.xyz
Field and topic search for research papers. Give a broad field name or short phrase (like 'crispr' or 'exercise science') and get a coherent, taxonomy-grounded seed cluster: the field is resolved against the OpenAlex topics taxonomy, then the cluster returns the top-cited plus recent-influential works, each with title, authors, year, venue, citation count, and DOI. Solves the broad-term entry problem dense semantic search fails on. Keyless.
Email Validation API · api.kadec0.xyz
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@, sales@, noreply@), and free-provider flag, rolled into a per-address ok/risky/invalid verdict with reasons. Batch up to 25 addresses per call. Domain-level DNS checks only, no SMTP mailbox probe. Keyless.
Google Trends Related Topics · api.kadec0.xyz
Google Trends related topics for a keyword in a country: top topics (0-100 relative) and rising topics (% growth), with entity types. params: keyword, geo
Google Trends Interest Over Time · api.kadec0.xyz
Google Trends interest over time for a keyword: dated series indexed 0-100 (weekly over the default past 12 months, daily for 30/90-day windows), optional country geo, windows from the past hour to 2004. params: keyword, geo, timeframe