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Exa

Neural Web Search for AI Agents

Exa is a search engine designed for AI. Unlike traditional search, Exa uses neural embeddings to find semantically relevant results — not just keyword matches. Access search, findSimilar, contents, and AI-powered answers via x402 with no API key required.

4 endpoints live on Base
Live on Solana
WebsiteExa Docs

Capabilities

Neural Search
Semantic and keyword web search with optional category filter: company, research paper, news, pdf, github, linkedin profile, and more.
Find Similar
Discover pages semantically similar to any URL — ideal for competitive research and content discovery.
Page Contents
Extract clean full text from specific URLs. Pass a list of URLs and get structured content back.
Answer
Get an AI-generated answer grounded in live web search results. No hallucination, just sourced responses.

What AI Agents Use It For

Companies like HubSpot, Mercor, 11x, and KKR use Exa to automate research workflows that used to require human analysts. On BlockRun, any AI agent can do the same — no account, no subscription, $0.01 per search.

Lead Sourcing

$0.03 per lead

Find decision-makers at target companies. Search for "Series D security CTOs in SF", extract LinkedIn profiles, synthesize contact info — all in one agent loop.

searchcategory: "linkedin profile"$0.01
contentsextract profile data from 5 URLs$0.01
answersynthesize contact summary$0.01

Competitive Intelligence

$0.03 per report

Map out a competitor's ecosystem. Find similar companies, read their pages, get a synthesized overview — continuously, not just once.

find-similarcompetitor URL → similar companies$0.01
contentsread 5 competitor pages$0.01
answersummarize competitive landscape$0.01

Due Diligence

$0.02 per company

Research any company, person, or technology before a meeting, investment, or partnership. Grounded in live web data, not LLM memory.

searchcompany name + funding + team$0.01
answergrounded summary with citations$0.01

Real-Time Research

$0.01 per question

Answer questions about things that happened after the LLM's training cutoff. Latest protocol updates, recent funding rounds, breaking news.

answerlive web-grounded answer with sources$0.01

Pricing

Per-request pricing. No subscriptions, no monthly minimums.

search / find-similar / answer
$0.01
per request
contents
$0.002
per URL
Price scales with the number of URLs in the request

API Reference

Base (USDC): https://blockrun.ai/api/v1/exa/

Solana (USDC): https://sol.blockrun.ai/api/v1/exa/

All endpoints accept POST with a JSON body matching the Exa API spec. Send without a payment header to get a 402 with the exact price.

EndpointMethodPriceDescription
/api/v1/exa/searchPOST$0.010Neural and keyword web search. Optional category filter: company, research paper, news, pdf, github, tweet, personal site, linkedin profile, financial report.
/api/v1/exa/find-similarPOST$0.010Find pages semantically similar to a given URL.
/api/v1/exa/contentsPOST$0.002Extract full text content from specific URLs. Priced at $0.002/URL.
/api/v1/exa/answerPOST$0.010Get an AI-generated answer to a question grounded in live web search results.

Quick Start

Neural web search in a single request:

# Base (USDC on Base)
curl -X POST https://blockrun.ai/api/v1/exa/search \
  -H "Content-Type: application/json" \
  -d '{"query": "latest AI agent frameworks"}'
# Returns: 402 with price ($0.0100) and Base USDC payment instructions

# Solana (USDC on Solana)
curl -X POST https://sol.blockrun.ai/api/v1/exa/search \
  -H "Content-Type: application/json" \
  -d '{"query": "latest AI agent frameworks"}'
# Returns: 402 with price and Solana USDC payment instructions

# Paid request (add x402 payment header to either endpoint)
curl -X POST https://blockrun.ai/api/v1/exa/search \
  -H "Content-Type: application/json" \
  -H "x-payment: <x402_payment_token>" \
  -d '{"query": "latest AI agent frameworks", "numResults": 10}'

# LinkedIn profile search
curl -X POST https://blockrun.ai/api/v1/exa/search \
  -H "Content-Type: application/json" \
  -H "x-payment: <x402_payment_token>" \
  -d '{"query": "hedge fund portfolio manager New York", "category": "linkedin profile", "numResults": 10}'

Use the BlockRun Python SDK or TypeScript SDK to handle x402 payment automatically.

Start searching with Exa

Fund your wallet with USDC on Base or Solana and start querying the web immediately. No registration, no API keys required.

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