Synthesized answer with citations from the 9-provider fan-out

Same fan-out as /search/sources, plus an LLM synthesis pass that produces a cited answer. Returns { answer, citations, cost } — the underlying sources are not echoed back; call /search/sources separately if you need the raw evidence pile. When the synthesis model fails (timeout, malformed structured output), the endpoint still returns 200 with answer: null and cost.synthesis_error set, but no result list. Charges sum of upstream provider costs + LLM token cost + $0.03 lava-search markup.

POST /search/answer

Synthesized answer with citations from the 9-provider fan-out

cURL

curl --request POST \
  --url https://api.lava.so/v1/search/answer \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "q": "Current state of NIST post-quantum standardization 2025-2026 — ML-KEM and ML-DSA deployment, FrodoKEM as a hedge, security margin against Module-LWE attacks"
}
'

200

{
  "answer": "<string>",
  "citations": [
    {
      "source": "<string>",
      "url": "<string>",
      "title": "<string>"
    }
  ],
  "cost": {
    "breakdown": {},
    "llm_cost": "<string>",
    "markup": "<string>",
    "total": "<string>",
    "synthesis_error": "<string>"
  }
}

Authorizations

Authorization · string · header · required

Bearer token authentication used for standard API calls. Format: 'Bearer YOUR_API_KEY'

Body

application/json

q · string · required

The query to answer

providers · string[] | null

Optional subset of providers (defaults to all 9). See /search/sources for valid ids.

max_results_per_source · integer | null

Required range: 1 <= x <= 50

since · string<date-time> | null

Response

200

application/json

Synthesized answer with citations. When the LLM step fails, answer is null and cost.synthesis_error is set; the rest of the payload is unchanged. Underlying sources are not echoed back — call /search/sources separately if needed.

answer · string | null · required

Markdown answer citing sources via [N]. Null when the synthesis model failed.

citations · object[] · required

Show child attributes

cost · object · required

Show child attributes