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We search the web, synthesize the results, and cite our sources.
Endpoint
POST /search/v1/answer

import Casedev from 'casedev';

const client = new Casedev({ apiKey: 'sk_case_YOUR_API_KEY' });

const result = await client.search.v1.answer({
  query: 'What is the statute of limitations for medical malpractice in California?'
});

console.log(result.answer);
// "In California, the statute of limitations for medical malpractice
//  is generally 3 years from the date of injury or 1 year from when
//  the patient discovered the injury [1]. Exceptions exist for
//  foreign objects [2] and minors [3]."

for (const citation of result.citations) {
  console.log(`[${citation.id}] ${citation.title}: ${citation.url}`);
}
Response
{
  "answer": "In California, the statute of limitations for medical malpractice is generally 3 years from the date of injury or 1 year from when the patient discovered or should have discovered the injury, whichever comes first [1]. However, there are exceptions for cases involving foreign objects left in the body [2] and for minors [3].",
  "citations": [
    {
      "id": "1",
      "url": "https://law.cornell.edu/california/medical-malpractice",
      "title": "California Medical Malpractice Laws",
      "text": "California Code of Civil Procedure Section 340.5..."
    },
    {
      "id": "2",
      "url": "https://findlaw.com/healthcare/foreign-object-exception",
      "title": "Foreign Object Exception",
      "text": "When a foreign object is left in the body..."
    }
  ]
}

​
Parameters

ParameterTypeDefaultDescription
querystringRequiredQuestion to answer
numResultsnumber10Number of sources to search
includeDomainsarray—Only search these domains
excludeDomainsarray—Exclude these domains
useCustomLLMbooleanfalseUse Case.dev LLM for answer
modelstringgpt-4oLLM model (when useCustomLLM: true)
streambooleanfalseStream the response

​
Examples

​
Basic question

const result = await client.search.v1.answer({
  query: 'What are the requirements for a valid non-compete agreement in Texas?'
});

​
Authoritative sources only

const result = await client.search.v1.answer({
  query: 'What is the current federal minimum wage?',
  includeDomains: ['dol.gov', 'law.cornell.edu', 'congress.gov'],
  numResults: 5
});

​
With custom LLM

const result = await client.search.v1.answer({
  query: 'Explain the differences between Chapter 7 and Chapter 11 bankruptcy',
  useCustomLLM: true,
  model: 'anthropic/claude-sonnet-4.5'
});
Web data only. For comprehensive legal research, use Lexis, Westlaw, or OpenLaws.