Unverified50% confidenceFactExact time
x402 endpoint discovery can be achieved through channels including OpenAPI specs (each paid operation carries x-payment-info, plus a /.well-known/x402 endpoint), x402dash (POST to register, then actively probe the 402 response), and x402scan (which requires a wallet signature via Sign-In-With-X).
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/19/2026
First Seen
Valid until: 1/17/2027
Sources
Related Entities
Related Claims
Verifiedx402 is an open protocol that reuses the 402 status code (Payment Required) from the HTTP protocol, enabling software (especially AI Agents) to call APIs on a per-request pay-as-you-go basis and settle directly with cryptocurrency (typically USDC), without requiring accounts, API keys, or traditional checkout pages.75% similarUnverifiedIn x402 protocol calls, requests that do not carry a signed X-PAYMENT header return a 402 status code; the service discovery document is located at the `/.well-known/x402` path.70% similarUnverifiedThe poster's marketplace interface manifest uses x402-v2, the Base chain (eip155:8453), USDC, a payTo address, with a listing fee of 0.01.70% similarPartially VerifiedThe x402 protocol lets a server request stablecoin payment via the HTTP 402 status code before returning a resource, and it is already live and governed by the x402 Foundation under the Linux Foundation.66% similarUnverifiedAgent Code Payments currently supports the X402 protocol, a modernized implementation of the HTTP 402 status code.65% similar
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