Unverified50% confidenceFactExact time
In the x402 protocol, the server declares the fee and payment address in the response header, and upon receiving a 402, the Agent automatically attaches an on-chain payment proof (typically a stablecoin transaction).
1
Sources
50%
Confidence
Long-term
Relevance
10/11/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe x402 payment flow consists of four steps: initiating a request, receiving a 402 response with transaction terms, signing and retrying via the PAYMENT-SIGNATURE request header, and having the facilitator verify and settle on-chain before returning data along with a PAYMENT-RESPONSE receipt.77% similarUnverifiedThe combination of pay-per-inference + x402 protocol + managed payments may become the universal paradigm for future transactions between agents and service providers.64% similarUnverifiedOpenAI's subscription payment backend is handled by Stripe.61% similarUnverifiedFor subscriptions made through legitimate channels via the original payment path, if the account is banned, the official refund will be returned via the original route.61% similarUnverifiedStripe's payment API carries an Idempotency-Key header on each payment request, ensuring that client retries caused by network jitter do not result in duplicate charges.61% similar
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