Web Research with x402 APIs

Access Exa (neural search) and Firecrawl (web scraping) through x402-protected endpoints.

Setup

See rules/getting-started.md for installation and wallet setup.

Quick Reference

Task	Endpoint	Price	Best For
Neural search	https://stableenrich.dev/api/exa/search	$0.01	Semantic web search
Find similar	https://stableenrich.dev/api/exa/find-similar	$0.01	Pages similar to a URL
Extract text	https://stableenrich.dev/api/exa/contents	$0.002	Clean text from URLs
Direct answers	https://stableenrich.dev/api/exa/answer	$0.01	Factual Q&A
Scrape page	https://stableenrich.dev/api/firecrawl/scrape	$0.0126	Single page to markdown
Web search	https://stableenrich.dev/api/firecrawl/search	$0.0252	Search with scraping

When to Use What

Scenario	Tool
General web search	WebSearch (free) or Exa ($0.01)
Semantic/conceptual search	Exa search
Find pages like X	Exa find-similar
Get clean text from URL	Exa contents
Scrape blocked/JS-heavy site	Firecrawl scrape
Search + scrape results	Firecrawl search
Quick fact lookup	Exa answer

See rules/when-to-use.md for detailed guidance.

Exa Neural Search

Semantic search that understands meaning, not just keywords:

npx agentcash@latest fetch https://stableenrich.dev/api/exa/search -m POST -b '{
  "query": "startups building AI agents for customer support",
  "numResults": 10,
  "type": "neural"
}'

Options:

• query - Search query (required)
• numResults - Number of results (default: 10, max: 25)
• type - "neural" (semantic) or "keyword" (traditional)
• includeDomains - Only search these domains
• excludeDomains - Skip these domains
• startPublishedDate / endPublishedDate - Date range filter

Returns: List of URLs with titles, snippets, and relevance scores.

Find Similar Pages

Find pages semantically similar to a reference URL:

npx agentcash@latest fetch https://stableenrich.dev/api/exa/find-similar -m POST -b '{
  "url": "https://example.com/article-i-like",
  "numResults": 10
}'

Great for:

• Finding competitor products
• Discovering related content
• Expanding research sources

Extract Text Content

Get clean, structured text from URLs:

npx agentcash@latest fetch https://stableenrich.dev/api/exa/contents -m POST -b '{
  "urls": [
    "https://example.com/article1",
    "https://example.com/article2"
  ]
}'

Options:

• urls - Array of URLs to extract
• text - Include full text (default: true)
• highlights - Include key highlights

Cheapest option ($0.002) when you already have URLs and just need the content.

Direct Answers

Get factual answers to questions:

npx agentcash@latest fetch https://stableenrich.dev/api/exa/answer -m POST -b '{"query": "What is the population of Tokyo?"}'

Returns a direct answer with source citations. Best for:

• Factual questions
• Quick lookups
• Verification of claims

Firecrawl Scrape

Scrape a single page to clean markdown:

npx agentcash@latest fetch https://stableenrich.dev/api/firecrawl/scrape -m POST -b '{"url": "https://example.com/page-to-scrape"}'

Options:

• url - Page to scrape (required)
• formats - Output formats: ["markdown", "html", "links"]
• onlyMainContent - Skip nav/footer/ads (default: true)
• waitFor - Wait ms for JS to render

Advantages over WebFetch:

• Handles JavaScript-rendered content
• Bypasses common blocking
• Extracts main content only
• LLM-optimized markdown output

Firecrawl Search

Web search with automatic scraping of results:

npx agentcash@latest fetch https://stableenrich.dev/api/firecrawl/search -m POST -b '{
  "query": "best practices for react server components",
  "limit": 5
}'

Options:

• query - Search query (required)
• limit - Number of results (default: 5)
• scrapeOptions - Options passed to scraper

Returns search results with full scraped content for each.

Workflows

Deep Research

• (Optional) Check balance: npx agentcash@latest wallet info
• Search broadly with Exa
• Find related sources with find-similar
• Extract content from top sources
• Synthesize findings

npx agentcash@latest fetch https://stableenrich.dev/api/exa/search -m POST -b '{"query": "AI agents in healthcare 2024", "numResults": 15}'

npx agentcash@latest fetch https://stableenrich.dev/api/exa/find-similar -m POST -b '{"url": "https://best-article-found.com"}'

npx agentcash@latest fetch https://stableenrich.dev/api/exa/contents -m POST -b '{"urls": ["url1", "url2", "url3"]}'

Blocked Site Scraping

• Try WebFetch first (free)
• If blocked/empty, use Firecrawl with waitFor for JS-heavy sites

npx agentcash@latest fetch https://stableenrich.dev/api/firecrawl/scrape -m POST -b '{"url": "https://blocked-site.com/article", "waitFor": 3000}'

Cost Optimization

• Use Exa contents ($0.002) when you already have URLs
• Use WebSearch/WebFetch first (free) and fall back to x402 endpoints
• Batch URL extraction - pass multiple URLs to Exa contents
• Limit results - request only as many as needed