Web Search API
POST /api/search $0.01 per call
USDC on Base · x402
WEB SEARCH for keyless agents — POST {query} and get LLM-ready results: title, url, extracted content snippet, relevance score, plus a direct answer synthesized from live results. Options: max_results (1-10, default 5), topic (general|news). No API key, no account — the x402 payment IS the auth. Query up to 400 chars.
Parameters
| Name | In | Description | |
|---|---|---|---|
query | body | required | The search query, up to 400 characters |
max_results | body | How many results to return (1-10, default 5) | |
topic | body | general (default) or news |
Example request
curl -X POST "https://api.webbersites.com/api/search" \
-H "Content-Type: application/json" \
-d '{"query":"x402 payment protocol adoption 2026","max_results":5}'
# first call returns 402 + payment requirements; an x402 client pays and retries automaticallyExample response
{
"query": "x402 payment protocol adoption 2026",
"answer": "The x402 protocol has seen growing adoption...",
"results": [
{
"title": "x402.org",
"url": "https://x402.org",
"content": "An open protocol for internet-native payments...",
"score": 0.97
}
]
}MCP tool: post_search — via npx -y webbersites-x402-mcp (local, key stays on your machine) or the remote endpoint https://api.webbersites.com/mcp.
How payment works
There is no signup and no API key. Call the endpoint; it replies 402 Payment Required with machine-readable payment requirements. Your client signs a USDC transfer authorization (EIP-3009, gasless) and retries with the X-PAYMENT header — @x402/fetch does this automatically. See the overview for a working snippet.