Paid resource evidence
Pinata Private File Upload Initializer
Account-free private IPFS upload initialization.
ResolveBots evidence
This is one of the cleanest x402-native utility patterns: pay a tiny amount, get a scoped upload URL, and avoid a traditional account/API-key setup. The docs/sample mismatch around `fileSize` is worth noting, but the corrected query-parameter call worked cleanly.
Observed sample
Returned a signed uploads.pinata.cloud private upload URL after a one-tenth-cent x402 payment on Base.
Verdict: Best storage primitive