Commit-time authorization semantics in agent-initiated payments (scope clarification)

[creativ-solutions]

This issue raises a general scoping question relevant to agent-initiated payment authorization, independent of any specific implementation.

Context

In agent-driven commerce flows, payment authorization necessarily crosses a boundary where an abstract operation (“initiate payment”) becomes an irreversible economic commitment.

Across the ecosystem, different systems implicitly or explicitly derive commit-time semantics from a mix of:

• agent-issued operations,
• observed UI or page state,
• interpreted intent,
• or backend reconciliation logic.

Architectural question

At that commit boundary, there appears to be an open semantic question:

What exactly is the object being authorized for payment, and how tightly is authorization bound to a single, immutable economic state at the moment of commitment?

This question is orthogonal to agent authentication, replay protection, and transport security, but directly affects determinism, auditability, and liability attribution in agent-initiated checkout.

Relevance to TAP

As TAP defines cryptographic mechanisms for trusted agent operations, it may be useful to clarify how commit-time authorization semantics are intended to be scoped:

• whether authorization is defined at the level of an operation,
• a derived economic state,
• or another explicitly defined object.

This issue is intended purely as a scoping and clarification question, not as a proposal or critique.

Creativ Solutions BV

[douglasborthwick-crypto]

Concrete example of how this could be scoped: at commit time, verify the on-chain state that the authorization depends on.

If a payment is authorized contingent on the buyer holding a loyalty token, or the seller being a verified merchant with on-chain credentials, then the authorization object should be bound to that verifiable state at the moment of commitment, not to the agent's representation of it.

We've implemented this pattern with InsumerAPI. POST /v1/attest returns an ECDSA-signed boolean verifying token holdings across 33 chains (30 EVM + Solana + XRPL + Bitcoin). The signature creates a cryptographic checkpoint at the commit boundary: "at time T, wallet W held token X on chain C" is the verifiable object, independent of agent interpretation.

This addresses the determinism and auditability concerns you raised, at least for the subset of authorizations that depend on on-chain state.