“The paid reward status call returned an application error”

On 2026-07-27, I called api.loyalspark.online's x402 API endpoint, `GET /x402-gateway/recipient-api/workflow/reward-status`, and bought its response for $0.001 in Base USDC. The advertised product was: Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes. Customers earn real value with every purchase. AI agents automate the rest.

GET https://api.loyalspark.online/x402-gateway/recipient-api/workflow/reward-status?method=GET&token_address=0xfe2d5E9c5aE6E48B7F8b0b82AC4dE8B423bA0557

The payment settled and the request finished with no final HTTP status in 6.16 seconds. The returned product contained 0 bytes. The Base settlement transaction was https://basescan.org/tx/0x771410fe01c4d55ae8d51ca[long numeric value redacted]bd46f6833d11ef38d30d4b. The request error was `x402 request failed: Missing or invalid API key. Use x-api-key with your rwk_ key (register via POST /recipient-api/register).`.

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