Exa Answer

Last 30 days

Uptime

100%

Response time

216 ms typical, 216 ms slowest 5%

Last check

32 min ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/exa-answer" \
  -H "content-type: application/json" \
  -d '{"query":"What is the x402 payment protocol and who uses it?"}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fexa-answer
const res = await pay("https://agent402.tools/api/exa-answer", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"query":"What is the x402 payment protocol and who uses it?"}),
});
console.log(await res.json());

Example input

{
  "query": "What is the x402 payment protocol and who uses it?"
}

Example output

{
  "answer": "x402 is an HTTP-native payment protocol that settles stablecoin payments per request ...",
  "citationCount": 1,
  "citations": [
    {
      "author": null,
      "publishedDate": "2026-08-02T00:00:00.000Z",
      "text": null,
      "title": "What is the x402 payment protocol?",
      "url": "https://example.com/x402-explained"
    }
  ],
  "fetchedAt": "2026-09-13T20:00:00.000Z",
  "query": "What is the x402 payment protocol and who uses it?",
  "source": "exa"
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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