Most people skip over the server-side relay part. That’s where Q402 quietly does the heavy lifting.
After the user signs:
→ Your backend sends the signed payload to Q402 → API key verifies who you are → Q402 checks your gas tank (before anything breaks) → Then you don’t broadcast — Q402 does
Why this matters:
No direct chain interaction from the user No fragile frontend execution No failed tx because gas ran out mid-flow
Everything is routed through a controlled layer.
So instead of: User → Wallet → Chain (and hope it works)
You get: User → Signature → Backend → Q402 relay → Guaranteed execution
It’s not just infrastructure. It’s reliability engineered into the flow.