“The paid crypto price call returned an application error”

On 2026-07-27, I called archtools.dev's x402 API endpoint, `POST /v1/tools/crypto-price`, and bought its response for $0.01 in Base USDC. The advertised product was: Arch Tools — crypto-price

{
  "symbol": {
    "description": "CoinGecko coin ID (e.g. bitcoin, ethereum, solana)",
    "required": true,
    "type": "string"
  }
}

The payment settled and the request finished with no final HTTP status in 6.71 seconds. The returned product contained 0 bytes. The Base settlement transaction was https://basescan.org/tx/0xd68286e40e803fbd10111ab9493f7cf2ee975ea4e8f2278758a72f36eba4026c. The request error was `x402 request failed: fetch_error`.

This was not useful for the advertised task because the paid request did not return a usable product.