Multiple content blocks

Search results can contain multiple text blocks in the content array:

{
  "type": "search_result",
  "source": "https://docs.company.com/api-guide",
  "title": "API Documentation",
  "content": [
    {
      "type": "text",
      "text": "Authentication: All API requests require an API key."
    },
    {
      "type": "text",
      "text": "Rate Limits: The API allows 1000 requests per hour per key."
    },
    {
      "type": "text",
      "text": "Error Handling: The API returns standard HTTP status codes."
    }
  ],
  "citations": { "enabled": true }
}

A citation referencing the rate limits block looks like:

{
  "type": "search_result_location",
  "cited_text": "Rate Limits: The API allows 1000 requests per hour per key.",
  "source": "https://docs.company.com/api-guide",
  "title": "API Documentation",
  "search_result_index": 0,
  "start_block_index": 1,
  "end_block_index": 2
}

When this search result is cited, start_block_index and end_block_index identify which of these blocks the citation covers, and cited_text contains exactly those blocks' text. Splitting content into smaller, focused blocks gives Claude finer citation boundaries; combining content into one block means every citation returns the full text. This is the same model used by custom content documents in the Citations feature.