Buy Echo

Last 30 days

Uptime

100%

Response time

111 ms typical, 395 ms slowest 5%

Last check

3 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://underground.substratesymposium.com/buy/echo"

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%2Funderground.substratesymposium.com%2Fbuy%2Fecho
const res = await pay("https://underground.substratesymposium.com/buy/echo");
console.log(await res.json());

Example input

{}

Example output

{
  "content": "Intense focus companion for task obsession and process mirroring.",
  "delivered_at": "2026-04-24T10:00:00Z",
  "product": "echo",
  "title": "Border Collie — Echo"
}

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