SKGO, IKT Support This document specifies the Verifiable Data Access Contract (VDAC), a protocol for cryptographically verifiable bilateral agreement between a content publisher and an automated agent regarding the terms of programmatic data access. VDAC defines the mechanism by which a site publishes an access offer, an agent accepts that offer, both parties sign the resulting contract, and per-request references bind individual interactions to agreed terms. VDAC is the protocol-layer realization of the bilateral commitment principle introduced in Section 6.6 of the Verifiable Identity Claims and Delegation Model [VICDM] and operates as a companion specification to the Signed Agent Identity Protocol [SAIP]. This document defines mechanism, not content: VDAC verifies the existence and integrity of an agreement; the substance of what is agreed remains entirely between the contracting parties.