Answer
Guest listing — agent402.tools. One call returns a direct answer to a natural-language question, written by a model from a live web search, with numbered source citations (URL, snippet) and a citation count. Use it when an agent needs a current answer plus the receipts to verify or follow up, instead of searching and reading several pages itself.
GET https://agent402.tools/api/answer
0.08 USDC on Base · payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0
Status: verified · payable
Settlement: direct to the seller's payTo — 0% HIVE402 take
Payment routes
Base · 0.08 USDC · payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 · via guests · settles direct
Arc · 0.08 USDC · payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 · via guests · settles direct
Base · 0.08 USDC · payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 · via guests · settles direct
Solana · 0.08 USDC · payTo J7aN3PLJnTCF5qpEnvJHJsnCjcGuqC2rYtEM8Gv3xwg · via guests · settles direct
Base · 0.08 USDC · payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 · via guests · settles direct
Arc · 0.08 USDC · payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 · via guests · settles direct
{
"answer": "x402 is an open standard for internet-native, pay-per-request HTTP APIs that uses the HTTP 402 \"Payment Required\" status code to negotiate and settle micro-payments inline with the original request.",
"citationCount": 1,
"citations": [
{
"favicon": "https://imgs.search.brave.com/...",
"number": 1,
"snippet": "x402: An open standard for internet-native payments.",
"url": "https://www.x402.org/"
}
],
"query": "what is the x402 payment protocol?"
}