x402 is an open protocol, governed by the x402 Foundation, that brings HTTP 402 “Payment Required” back into practical use as a native payment layer for APIs, websites, and autonomous agents. This session will introduce x402 and its relevance to the emerging machine-driven internet, where agents, services, and spatial applications need to discover resources, understand pricing, and complete transactions programmatically.

The session will then examine the Signed Offer and Receipts extension to x402, which creates cryptographically signed receipts as verifiable payment records. The session will explore how these portable proofs could connect to decentralized trust systems such as ERC-8004 and OMATrust to provide trust layer for the open Spatial Web.

The session will also explore how these mechanisms could relate to the MSF Open Metaverse Browser Initiative, including service discovery, agent payments, and trust-aware spatial interactions.

Presenters:

• Eric Reppel, Co-Founder | x402 Foundation
• Alfred Tom, Executive Director | OMA3

The Metaverse Standards Forum invites Forum members and Standards Development Organizations (SDOs) to present relevant ongoing or completed work to the MSF and the public via Special SDO Sessions.

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