Web Research with x402 APIs

STOP — Read before making any API call. enrichx402.com endpoints are not the same as each provider's native API. All paths use the format https://enrichx402.com/api/{provider}/{action}. You MUST either:

1. •Copy exact URLs from the Quick Reference table below, OR
2. •Run x402.discover_api_endpoints(url="https://enrichx402.com") to get the correct paths

Guessing paths will fail with 405 errors (wrong path) or 404 errors (missing /api/ prefix).

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

When to Use What

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

Exa Neural Search

Semantic search that understands meaning, not just keywords:

x402.fetch(
  url="https://enrichx402.com/api/exa/search",
  method="POST",
  body={
    "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:

x402.fetch(
  url="https://enrichx402.com/api/exa/find-similar",
  method="POST",
  body={
    "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:

x402.fetch(
  url="https://enrichx402.com/api/exa/contents",
  method="POST",
  body={
    "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:

x402.fetch(
  url="https://enrichx402.com/api/exa/answer",
  method="POST",
  body={
    "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:

x402.fetch(
  url="https://enrichx402.com/api/firecrawl/scrape",
  method="POST",
  body={
    "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:

x402.fetch(
  url="https://enrichx402.com/api/firecrawl/search",
  method="POST",
  body={
    "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

1. •(Optional) Check balance: x402.get_wallet_info
2. •Discover endpoints (required before first fetch): x402.discover_api_endpoints(url="https://enrichx402.com")
3. •Search broadly with Exa
4. •Find related sources with find-similar
5. •Extract content from top sources
6. •Synthesize findings

x402.fetch(
  url="https://enrichx402.com/api/exa/search",
  method="POST",
  body={"query": "AI agents in healthcare 2024", "numResults": 15}
)

x402.fetch(
  url="https://enrichx402.com/api/exa/find-similar",
  method="POST",
  body={"url": "https://best-article-found.com"}
)

x402.fetch(
  url="https://enrichx402.com/api/exa/contents",
  method="POST",
  body={"urls": ["url1", "url2", "url3"]}
)

Blocked Site Scraping

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

x402.fetch(
  url="https://enrichx402.com/api/firecrawl/scrape",
  method="POST",
  body={"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

Parallel Calls

Independent searches can run in parallel:

# These don't depend on each other
x402.fetch(url=".../exa/search", body={"query": "topic A"})
x402.fetch(url=".../exa/search", body={"query": "topic B"})