Exa AI Search API
Neural web search engine built for LLMs and agents that returns high-quality, full-text content via semantic or keyword search across the live web.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
API key auth only; no fine-grained scopes or read/write separation. Keys should be stored in secrets managers. TLS enforced on all endpoints.
⚡ Reliability
Best When
An agent needs high-quality, full-text web content for grounding or RAG, especially when semantic relevance matters more than keyword matching.
Avoid When
You need image/video search results, local business lookups, or extremely high query volumes at low cost.
Use Cases
- • Grounding LLM responses with current web information via semantic search
- • Finding similar pages or articles to a given URL or concept
- • Extracting full clean text from web pages for RAG pipelines
- • Searching for recent news, research papers, or company information
- • Agent tool use for real-time information retrieval
Not For
- • Image or video search (text-only results)
- • Local business or map-based searches
- • High-volume crawling of entire domains (use a dedicated scraper instead)
Interface
Authentication
Single API key passed as a Bearer token in the Authorization header. Key is provisioned immediately on signup with no additional verification required.
Pricing
Content extraction (getText) counts as an additional request per URL. The free tier is sufficient for prototyping agent tools.
Agent Metadata
Known Gotchas
- ⚠ Content extraction (getText) is a separate API call per URL and adds latency and cost
- ⚠ Neural/semantic search may return surprising results when the query is too short or ambiguous
- ⚠ numResults capped at 10 for free tier; paid tier supports up to 100 per request
- ⚠ Results may not include very recent content (index freshness varies by domain)
- ⚠ The 'autoprompt' feature rewrites queries which can produce unexpected behavior in strict agent pipelines
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Exa AI Search API.
Scores are editorial opinions as of 2026-03-06.