How an agent pays for an API with x402
The HTTP 402 flow end to end: what the challenge contains, what the agent signs, and what you need before you start.
Is it safe to let an agent spend money on your behalf?
Token approval versus signed per-payment authorization. Both look like "the agent can pay"; only one bounds the loss.
How to hand a secret from one agent to another
Moving a credential between two processes without leaving a copy behind, and what the usual approaches leave lying around.
How big is the x402 economy? We measured it
A full census of the public x402 catalog, taken 7 September 2026: $7,630 a month across 1,073 merchants.
SLIDINGBOX LLC provides software and API services. It does not provide cryptocurrency exchange, custody, investment, or money-transmission services.