Legal data

Search 22M+ legal entities from company registers, 9M US court opinions and 10M granted US patents, together or one collection at a time.

Legal entities

22M+ pages

Entities from company registers, with register numbers, status, and registered offices.

→ Companies House number and parent company of Lloyds Bank Plc

Court opinions

9M pages

US court opinions in full text, with court, docket, and citation details.

→ California appellate decisions on non-compete enforceability

Patents

10M pages

Granted US patents with abstracts, claims, inventors, and assignees.

→ solid-state battery electrolyte patents filed since 2022

Search by what matters

CompanyRegister numberCase nameCourtInvention

Search by company, register number, case name, court or invention. To search every legal collection, add includeDomains: ["exa.ai/library/legal"]. For one collection, use exa.ai/library/legal/entity, exa.ai/library/legal/opinion or exa.ai/library/legal/patent.

Read the docs →

# Same endpoint and API key as web search
curl https://api.exa.ai/search \
  -H "x-api-key: $EXA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "query": "NVIDIA Corporation",
  "includeDomains": ["exa.ai/library/legal"],
  "contents": { "text": true }
}'

Common questions

What legal data does Exa have?

More than 22M legal entities from company registers, about 9M US court opinions and about 10M granted US patents.

How do I search every legal collection?

Pass includeDomains: ["exa.ai/library/legal"] to the /search endpoint.

How do I search one legal collection?

Pass exa.ai/library/legal/entity, exa.ai/library/legal/opinion or exa.ai/library/legal/patent in includeDomains.

Is there a legal data API?

Yes. Legal entities, court opinions and patents are searchable through the same Exa /search endpoint and API key you use for web search, so there's no separate API to set up.

Start searching legal data

Get an API key in minutes, or talk to us about volume, coverage and enterprise terms.