2026-W36 market review — 1 new protocol, 1 draft, 3 status updates

Weekly automated review. Changes this run:

• x402: governance transferred to the vendor-neutral x402 Foundation under the Linux Foundation (announced April 2026, operationally active July 2026 with 40 members). Protocol V2 introduced CAIP-2 network identifiers, scoped packages, and new header names. Sources and summary updated.
• AP2: v0.2 released April 2026 with Human-Not-Present autonomous payment flows. Google donated AP2 and the Verifiable Intent framework (co-developed with Mastercard) to the FIDO Alliance. Mandate model reorganized from three types to two (Checkout + Payment, each Open or Closed). Sources updated.
• MPP: corrected co-authorship to Stripe and Tempo; added open spec at mpp.dev and Stripe blog announcement. Still early access/beta.
• P3P (new, live): Pine Labs Payment Protocol — India's first agentic payment protocol on UPI. Uses HTTP 402, UPI mandate infrastructure, and a Grantex identity layer. Live with Gullak since June 2026.
• AP4M (new, draft): Mastercard Agent Pay for Machines — machine-to-machine payment service launched June 2026 with 30+ partners. Added as draft because the primary Mastercard source URLs could not be confirmed to return HTTP 200 from automated fetchers.