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Semantic search for agents

curl -X POST https://vecky.emes.sh/search \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{"query": "semantic search embeddings"}'
create api key →
Feature Description
Search Find by meaning, not keywords. State-of-the-art Voyage AI embeddings.
Corpus 2M+ papers from arXiv, Semantic Scholar, DBLP, OpenAlex, Crossref, and more.
Speed Turbopuffer vector database. Sub-100ms p99 latency.
Custom Index your own documents. Private collections. (Pro+)
API Simple REST API. JSON responses. Bearer auth.

Indexed Sources

35 base sources continuously indexed. Filter by source in your API calls with the sources parameter. Derived per-topic or per-venue sources (e.g. openalex_pacmpl, dblp_pldi, semantic_scholar_pl, semantic_scholar_author_joshua_tenenbaum, crossref_compilers, pubmed_neuroscience, osf_psyarxiv) are also available for narrower filters.

Source Description
arxiv Open-access preprints in physics, math, CS, and more. 2M+ papers.
semantic_scholar AI-powered academic search. Citations, abstracts, full-text links.
dblp Computer science bibliography. Conference and journal papers.
openalex Open catalog of scholarly works, authors, institutions.
crossref Crossref metadata across journals, proceedings, and DOIs.
pubmed Biomedical and neuroscience papers via NCBI.
biorxiv Biology and neuroscience preprints.
medrxiv Medical and health preprints.
osf_preprints Preprints across OSF communities.
openreview Open peer review. ICLR, NeurIPS, and ML conference papers.
acl_anthology NLP and computational linguistics papers from ACL events.
iacr International Association for Cryptologic Research. ePrint archive.
acm ACM Digital Library. Computing research and publications.
zenodo CERN's open repository. Research data, software, papers.
enrich_dblp DBLP enrichment pass for author and venue metadata.
Source Description
nlab Category theory, homotopy theory, and higher mathematics wiki.
Source Description
hacker_news Y Combinator's tech news. Top stories and discussions.
hn_algolia HN Algolia search backfill for long-tail threads.
lobsters Computing-focused link aggregator. Curated tech discussion.
github Repository READMEs, documentation, issues, and code.
lesswrong Rationality, AI alignment, and effective altruism essays.
ea_forum Effective altruism discussions, research, and community posts.
community_archive Community-curated long-form posts and discussions.

Sources are refreshed via Oban cron jobs (cadence varies by source). Custom source requests? Let us know.

Pricing

free
$0
to get started
Queries/month 1,000
Rate limit 10 req/min
API keys 1
get started →
pro
$20
/month
Queries/month 50,000
Rate limit 60 req/min
Custom docs 10,000
Overage $0.50/1k
upgrade →
team
$100
/month
Queries/month 500,000
Rate limit 300 req/min
Custom docs 100,000
Overage $0.30/1k
contact us →

Need more? Contact us for Enterprise plans.

Documentation

Search the corpus with a natural language query.

{ "query": "neural networks for time series", "limit": 10, "sources": ["arxiv", "semantic_scholar"] }

Parameters

query Search query (required)
limit Results to return (default: 10, max: 100)
sources Filter by source (optional). Accepts base sources listed above and derived overrides like openalex_pacmpl or dblp_pldi. Base sources include all derived overrides.

Returns ranked results with scores and metadata.

{ "results": [ { "id": "arxiv:2301.12345", "title": "Neural Networks for...", "abstract": "We present...", "score": 0.892, "source": "arxiv" } ], "query_ms": 45 }

Include your API key in the Authorization header:

Authorization: Bearer vky_sk_...

API keys start with vky_sk_. Create keys in your dashboard.

Plan Requests/min Monthly Quota
free 10 1,000
pro 60 50,000
team 300 500,000

Rate limit headers: X-RateLimit-Remaining, X-RateLimit-Reset