Five shifts redrawing the funnel, the checkout, the protocol stack, and the services layer beneath them. Each one is already showing up in earnings, in tooling, and in how the labs themselves are organizing.
May 2026
The new front door is the inference session. Merchants now optimize for Answer Engine Optimization: structured schema, machine-readable feeds, real-time inventory endpoints.
OpenAI pulled ChatGPT Instant Checkout in March 2026, six months after launch. ChatGPT is now positioned as a discovery-first surface; checkout redirects to merchants. The dominant pattern is referral commerce.
Agentic commerce runs on multiple specialized protocols that work together, not one universal standard. The orchestration layer (ACP for ChatGPT checkout, UCP for Google discovery) decides what the agent does. The trust layer (AP2) carries the signed mandate proving the user authorized the spend. The payment layer (Visa TAP, Mastercard Agent Pay, x402 for machine payments) settles the transaction. MCP is the underlying tool connectivity. A single agent transaction can traverse all four — discover via UCP, authorize via AP2, pay via Agent Pay, all on MCP plumbing.
Agents are deployed faster than the security layer can keep up. Most are still provisioned like service accounts — shared keys, no scoped permissions, no audit trail. The fix is non-human identity (NHI), verifiable agent credentials and signed mandates. Issuer banks remain the gating function on agent-initiated transactions.
Most large enterprises don't have the in-house capacity to ship agentic systems — clean data pipelines, agent-ready workflows, governance, change management. The gap is so large that the model labs themselves are now stepping in. In May 2026, OpenAI launched DeployCo ($4B, $10B valuation, anchored by Tomoro and ~150 Forward Deployed Engineers) and Anthropic launched its own services arm ($1.5B from Blackstone, Goldman, Hellman & Friedman).