Development · Web app

Exa

Semantic search and web crawling API designed for AI agents

Visit exa.ai ↗

Exa (formerly Metaphor) is a search engine and crawling API built specifically for LLMs and autonomous agents. Instead of matching keywords, it uses neural embeddings to retrieve relevant web content, parse structured outputs, and extract token-efficient text highlights.

What it's for

  • Discover and enrich prospect lists for sales and marketing outreach
  • Provide real-time web retrieval context to autonomous AI agents and coding tools
  • Extract clean text and structured data from across the web without manual scraping

Features

  • Neural semantic search across web pages, companies, research, and code
  • Token-efficient text highlights extraction to reduce model context costs
  • Structured data extraction directly adhering to custom JSON schemas
  • Dedicated Contents and Monitors APIs for automated tracking and page reading
  • Configurable latency modes from sub-second instant searches to deep research
  • Official MCP server and developer integrations for agentic workflows

Pricing

Freemium. Free tier with credits available to test via API playground; paid usage-based plans.

Details

Type
Web app
Category
Development
Topic
Search APIs
Open source
No
Platforms
API, Web
For
Developers, AI engineers, and automation agencies building agentic workflows or lead-generation systems.
Alternative to
Tavily, SerpApi, Brave Search API, Perplexity API
Tags
search api, web scraping, ai agents, embeddings, data enrichment, lead generation

Why it was saved

  • @jordanlee__, 21 May 2025: Enables searching the web semantically to discover and enrich lead lists such as marketing agencies and accounting firms.
  • @jordanlee__, 5 May 2025: Finds targeted B2B prospect lists (such as marketing agencies and accounting firms) using semantic search rather than traditional keywords.

Compare

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