curl --request POST \
  --url https://api-beta.ai-baseline.xyz/v2/sandp_500/query \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "query": "What supply chain risks did Apple disclose in its 10-K filings?"
}
'

{
  "request_id": "req_...",
  "evidence": "<source_registry>\n  ...\n</source_registry>\n\n<evidence_chain relevance_score=\"9\">\n  ...\n</evidence_chain>\n\n<source_key>\n  ...\n</source_key>",
  "evidence_instructions": "Use the evidence field as the grounded context for answer generation. Base factual claims only on the evidence, cite source IDs exactly as shown, and say when the evidence does not support an answer.",
  "summary": {
    "domain": "sandp_500",
    "mode": "basic",
    "effort": "medium",
    "evidence_count": 8
  }
}