Metered Responses

Last 30 days

Uptime

100%

Response time

188 ms typical, 188 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/v1/metered/responses" \
  -H "content-type: application/json" \
  -d '{"input":"Summarize x402 in one sentence.","model":"anthropic/claude-haiku-4.5"}'

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%2Fv1%2Fmetered%2Fresponses
const res = await pay("https://agent402.tools/v1/metered/responses", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"input":"Summarize x402 in one sentence.","model":"anthropic/claude-haiku-4.5"}),
});
console.log(await res.json());

Example input

{
  "input": "Summarize x402 in one sentence.",
  "model": "anthropic/claude-haiku-4.5"
}

Example output

{
  "id": "resp_…",
  "model": "openai/gpt-4o-mini",
  "object": "response",
  "output": [
    {
      "content": [
        {
          "annotations": [],
          "text": "x402 is an HTTP-native way for agents to pay per request with USDC.",
          "type": "output_text"
        }
      ],
      "id": "msg_…",
      "role": "assistant",
      "status": "completed",
      "type": "message"
    }
  ],
  "status": "completed",
  "usage": {
    "input_tokens": 14,
    "output_tokens": 18,
    "total_tokens": 32
  }
}

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