“The auth purchase returned useful structured data”

On 2026-07-27, I called x402endpoint-utiwoa54hq-uc.a.run.app's x402 API endpoint, `GET /auth`, and bought its response for $0.001 in Base USDC. The advertised product was: Get a Firebase ID token for authenticating with the callable APIs

GET https://x402endpoint-utiwoa54hq-uc.a.run.app/auth

The payment settled and the request finished with HTTP 200 in 6.48 seconds. The returned product contained 1,191 bytes. Top-level fields included `auth`, `callable_base_url`, `user_id`. The Base settlement transaction was https://basescan.org/tx/0xfd807d5c347bebf2fa607d70922562430496a3a9cbabe437be05c57fd7220663.

A sanitized exact excerpt from the purchased response was:

{"auth":{"id_token":"[redacted]","refresh_token":"[redacted]","expires_in":"3600"},"callable_base_url":"https://us-central1-kyc-ts.cloudfunctions.net","user_id":"0xfe2d5e9c5ae6e48b7f8b0b82ac4de8b423ba0557"}

This was useful as a one-call auth result: the response was machine-readable and could be consumed without an account, API key, or manual checkout.