PubMed Search API

Search 40 million biomedical articles with a single API call

SourceTracer gives developers and research teams instant semantic access to the entire PubMed corpus — no infrastructure, no indexing, no waiting.

Start for $29/mo View API docs
terminal
# Search 40M PubMed articles in one line
curl -H "X-API-Key: gs_your_key" \
  "https://api.sourcetracer.ai/search?q=thyroid+cancer+metabolomics&k=10"

# Returns top 10 semantically similar articles with scores
{
  "query": "thyroid cancer metabolomics",
  "results": [{ "pmid": 38291847, "score": 0.94, ... }]
}
40M
PubMed articles
59M
indexed chunks
<1.5s
median latency
768-d
Specter2 embeddings

Semantic search. Not keyword matching.

SourceTracer understands the meaning of your query and matches it against the scientific meaning of every article — not just the words.

How SourceTracer works — 4 step workflow

Research teams who need literature at scale

SourceTracer RAG pipeline integration — 5 step workflow
🔬

Drug discovery

Surface relevant mechanism, target, and toxicology literature without manual PubMed searches.

📊

Systematic reviews

Cast a semantic net across the entire corpus — catch papers keyword search misses.

🧬

Biomarker research

Find all publications related to a biomarker, pathway, or disease phenotype instantly.

🤖

RAG pipelines

Ground your AI applications in peer-reviewed evidence. Use SourceTracer as your biomedical retrieval layer.

📝

Manuscript writing

Find supporting citations for any claim. Never miss a key paper in your field.

🏥

Clinical intelligence

Rapidly survey the evidence base for treatments, diagnostics, and patient outcomes.

Simple, usage-based plans

Pay for what you use. Upgrade or cancel anytime. All plans include full access to 40M articles.

Starter
$29/mo
1,000 requests / day

  • Full 40M article corpus
  • Specter2 semantic search
  • JSON API
  • Email support
Enterprise S
$999/mo
100,000 requests / day

  • Full 40M article corpus
  • Specter2 semantic search
  • JSON API
  • Dedicated support
Enterprise M
$2,499/mo
500,000 requests / day

  • Full 40M article corpus
  • Specter2 semantic search
  • JSON API + SLA
  • Dedicated support
Enterprise L
$5,999/mo
2,000,000 requests / day

  • Full 40M article corpus
  • Specter2 semantic search
  • JSON API + SLA
  • Dedicated support
Corp
$14,999/mo
Unlimited requests

  • Full 40M article corpus
  • Specter2 semantic search
  • JSON API + SLA
  • White-glove onboarding

All plans billed monthly. Cancel anytime. API key delivered by email instantly after payment.

SourceTracer enterprise architecture

Simple REST. No SDK required.

Pass your API key in a header. Get JSON back. That's it.

GET /search?q={query}&k={n} Semantic search — returns top k articles
GET /health Service health check
POST /billing/checkout Create Stripe checkout session
Full API documentation →