Verified85% confidenceFactExact time
The 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.
5
Sources
85%
Confidence
Medium-term (~90 days)
Relevance
10/13/2026
First Seen
Valid until: 1/11/2027
Sources
Related Entities
Related Claims
UnverifiedIn 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.78% similarVerifiedx402 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.77% similarUnverifiedAgent Code Payments currently supports the X402 protocol, a modernized implementation of the HTTP 402 status code.75% similarUnverifiedx402 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).66% similarUnverifiedXMPP was standardized by the IETF as RFC 3920/3921 in 2004, and its federated architecture allows different servers to communicate with each other.64% similar
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