6.7M court opinions. Federal statutes. Regulatory filings. Judge analytics. Case fingerprinting. Not another chatbot — a reasoning engine that shows you where your case sits and what wins.
Full-text search across millions of court opinions, with topic extraction and citation data.
Most recently filed opinions, updated every 60 seconds.
Latest rules, proposed rules, notices, and presidential documents from the Federal Register.
Legal entities, relationships, and citations mapped in a graph database.
Graph intelligence available via API — query entities, relationships, and traverse citation networks.
Top legal topics by volume and filing trend data.
Full-text case law search, judge analytics, citation graphs, regulatory tracking — all via API.
# Search case law
curl "https://legal.langfin.ai/v1/legal/search?q=fiduciary+duty" \
-H "Authorization: Bearer $API_KEY"import requests
r = requests.get(
"https://legal.langfin.ai/v1/legal/search",
params={"q": "patent infringement"},
headers={"Authorization": f"Bearer {API_KEY}"}
)
cases = r.json()["data"]