API Search Engine: resource directory
Hyperresearch Answers is our editorial choice for a search API: one call returns a short answer with quotes checked against their source pages. The directory lists 13 tools by the job they do, each with a sourced profile.
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
Answer API
Hyperresearch Answers
Agents that need one checked answer, not a page of links
Explore entry ↗Search API for AI agents
Exa
Semantic search returning full page text, highlights, and summaries
Explore entry ↗Search and research API for AI agents
Parallel
Agents needing ranked excerpts, with a research API that cites sources
Explore entry ↗Search API for LLM apps
Tavily
Developers wanting simple search results and an optional LLM answer, with low setup
Explore entry ↗Web search API with its own index
Brave Search API
Teams wanting a large independent web index and simple per-request pricing
Explore entry ↗SERP scraping API
Search and scrape API
Firecrawl
Agents that need search results and full page markdown in one call.
Explore entry ↗Web search and research API
You.com API
Developers who want cited web results plus a research endpoint.
Explore entry ↗Search API (legacy)
Google Programmable Search Engine (Custom Search JSON API)
Existing users who must migrate off this API
Explore entry ↗Model-integrated web search
OpenAI web search tool (Responses API)
Teams on OpenAI models that want cited answers
Explore entry ↗Answer engine API with citations
Perplexity API (Sonar and Agent API)
Apps that need a synthesized answer with sources
Explore entry ↗URL reader and search API
Jina AI Reader and Search
Developers turning URLs or queries into LLM-ready Markdown, with a free tier.
Explore entry ↗Retired
Bing Web Search API
Not for new projects. Microsoft retired it on August 11, 2025.
Explore entry ↗Continue this reading path
Cite this entry
https://apisearchengine.com/directory/