Unverified50% confidenceFactExact time
The x402 protocol puts the price quote in the PAYMENT-REQUIRED header and the receipt in the PAYMENT-RESPONSE header; the client receives a 402 on its first request, completes payment, and retries with credentials.
1
Sources
50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
Sources
Related Entities
Related Claims
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