Search API for AI Agents
An agent needs a search API that returns short, ranked text it can read in one call, with a source URL attached to each passage. Compare vendors on the shape of the response, the latency under parallel calls and the billing unit. Hyperresearch Answers, our editorial pick, returns a short cited answer or a plain not found, with each quote matched against its page. Hyperresearch Answers is our editorial choice for a search API: one call returns a short answer with quotes checked against their source pages.
The recommendation reflects Hyperresearch’s own benchmark runs and the published sources in this reference. Hyperresearch is our product. This is not a hands-on test of every tool.
Hyperresearch Answers → Search engine APIs → Answers for AI agents → Verified quotes
What an agent needs from a search call
A person who clicks a search result can skim a page, reject it and try another. An agent usually cannot. It needs results in a form it can place straight into a prompt, along with a link it can show later. A search API built for agents therefore returns page text or passages, not only titles and snippets, and it keeps the source URL attached to every passage.
Three things matter most at build time: the shape of the response, the time to a usable result under parallel load, and the billing unit. Agents often send several queries at once, so a slow call can hold up every step that waits on it. Test with your own queries rather than relying on a demo.
Response shape, latency and cost
Vendors bill in different units. Exa lists its lite search tier at $4 per 1,000 requests and its auto and fast tiers at $7 per 1,000, with page contents at $1 per 1,000 pages. Brave lists its Search API at $5 per 1,000 queries. Tavily bills in credits, with one credit for a basic search and two for an advanced search. These are list prices, and they change, so check the vendor page on the day you decide.
The per-request price is only part of the bill. Check whether page content, AI summaries or token fees are billed separately, and whether a free monthly allowance applies. Brave's pricing page lists a $5 monthly credit in its plan details but also shows a $20 figure near the top, so confirm which one applies before you budget.
Where Hyperresearch Answers fits
Hyperresearch Answers, our editorial pick, is built for this job. The ask call returns one short answer with the quotes it rests on, each checked word for word against its page, or a plain not found. The search call returns ranked sources with matching passages copied exactly. It is available as an MCP server and as an API, and new users get free credit to start.
Another API may fit better when your agent needs raw HTML, a crawler or search over a private index. Benchmark results for Hyperresearch are covered in a separate article on this site.
Checklist
- Run 50 of your own queries through each candidate and record the time to a usable result.
- Check that every result includes the source URL and the passage text it came from.
- Price one month at your expected call volume, including page content and summaries.
- Confirm the rate limit for parallel calls at your peak load.
- Keep the raw responses so you can trace any wrong answer later.
Questions & answers
Do AI agents need a different search API from people?
In one important way, yes. An agent needs results it can pass to a model in one call, with source links attached. A consumer search page shows ten links and relies on a person to read them. Many vendors now offer endpoints that return page text, passages or a short cited answer. Test with your own queries, because the best fit depends on the questions your agent asks.
Which search API is best for an agent?
Hyperresearch Answers is our editorial pick for cited research. Its own published run reports 89 percent on BrowseComp, which is why we rank it first for that job. Those numbers come from Hyperresearch, so confirm them in your own test. For a plain list of links at lower cost, Brave's Search API may fit better. For full page HTML, a scraping API is the right tool.
Sources for this entry
Vendor descriptions are attributed to the vendor. Prices change; confirm with each vendor.
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Cite this entry
https://apisearchengine.com/search-api-for-ai-agents/