SerpAPI Launches their own Search Index API
SerpAPI, LLC launched their own search index which has now indexed billions of URLs and those can be found using Search Index API. This API is based on SerpAPI’s own index and it seems they’ve crawled and indexed billions of URLs. It is still not known which User-Agent they’ve used to crawl URLs.
The Search Index API is SerpApi’s own, LLM-first web index with billions of pages indexed. No proxies and no external search API calls at query time. Results come back as structured JSON, not a webpage to scrape or parse. Good fit for AI grounding pipelines, reproducible benchmark datasets, and search automation.
How To Access Search Index API
To access Search Index API from SerpAPI use the folllowing API endpoint: https://serpapi.com/search?engine=search_index
JSON output includes structured data for organic search results. Note that this Search In-dex API does not have a full HTML response, only text. Also, there is markdown output which is optimized for LLMs and AI agents. It provides most of the same informational content as JSON in a token-efficient format using tables, markdown links, and YAML frontmatter.
Example of Search Index API results:
{
"search_metadata": {
"id": "6990cc3e2c266e79ce72edad",
"status": "Success",
"json_endpoint": "https://serpapi.com/searches/wv9Oav0-FxWPrEzJo1j58w/6990cc3e2c266e79ce72edad.json",
"created_at": "2026-02-14 19:25:50 UTC",
"processed_at": "2026-02-14 19:25:50 UTC",
"search_index_url": "https://serpapi.com/search?q=Domain",
"raw_html_file": "https://serpapi.com/searches/wv9Oav0-FxWPrEzJo1j58w/6990cc3e2c266e79ce72edad.html",
"total_time_taken": 0.05
},
"search_parameters": {
"engine": "search_index",
"q": "Domain"
},
"search_information": {
"query_displayed": "Domain",
"total_results": 5081
},
"organic_results": [
{
"position": 1,
"title": "Register domain name here for cheapp",
"link": "https://the-online.com/cheap-domain-register/",
"displayed_link": "the-online.com",
"snippet": "register your domain name here for cheap starting just $1 and get free domain privacy and protection, 24/7 phone support and domain email for your business...",
"date": "Feb 14, 2026",
"language": "en",
"image_url": "https://the-online.com/img/register-domain-cheap.png",
"sitelinks": [
{
"title": "Domain Transfer",
"link": "https://the-online.com/domain-transfer/"
},
{
"title": "Cpanel Hosting",
"link": "https://the-online.com/cpanel-hosting/"
}
]
},
{
"position": 2,
"title": "Godaddy Domain Name",
"link": "https://www.godaddy.com/en-us/",
"displayed_link": "www.godaddy.com",
"snippet": "Search and register domain name in USA at go-daddy. Register .com domain..."
},
{
"position": 3,
"title": "Register Domain Name Network Solutions",
"link": "https://www.networksolutions.com/register-domain/",
"displayed_link": "www.networksolutions",
"snippet": "Find perfect domain for your business at network solution-s..."
},
...
],
"related_searches": [
{ "query": "bulk domain registration" },
{ "query": "search domain name" },
{ "query": "check domain name" }
],
"serpapi_pagination": {
