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x402engine Web Search
x402
x402engine Web Search is a paid API for AI agents from x402engine.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).
Performs neural web search with highlighted snippets across articles, news, research, and general web content, returning ranked results with optional full-page text.
Price / call$0.01
Success—
StatusUnknown
How this service works
x402engine — Neural web search with highlighted snippets — find articles, news, research, and any web content
Output
Returns a ranked list of web search results (up to 30), each containing the URL, title, and highlighted snippet of the matched content. Optionally includes full page text for deeper analysis. Results are filtered by category and/or domain when specified.
Example use cases
Real-time crypto news monitoring
“Search the web for the latest Bitcoin ETF news from the past few days and return 10 results — use the news category filter.”
Academic research paper discovery
“Find me recent research papers about large language model alignment on arxiv.org — I want 15 results in the research paper category.”
Competitive company intelligence
“Search the web for information about Anthropic's latest product announcements and return 10 results, filtering results to techcrunch.com and theverge.com only.”
Technical details
Endpoint
POSThttps://x402engine.app/api/search/web?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, pay-per-call web search with category filtering (news, research papers, GitHub, tweets, PDFs) and optional domain restriction. It is ideal for AI agents that need real-time web information without a subscription, especially when the query is domain-specific or category-constrained. Prefer this over general-purpose search APIs when you want micropayment-based access without API key management.
Side effects
- Empty query string returns a validation error
- numResults outside 1-30 range may be rejected or clamped
- Invalid category value may return no results or an error
- Restricted or unavailable domains in includeDomains may yield fewer results than requested
- Payment failure (HTTP 402) if USDC micropayment is not provided
- Very niche queries may return zero results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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