Today, we're launching Rankly's Agentic Commerce Protocol Tracker, a live feed of merged pull requests, releases, and spec changes across the open-source protocols shaping agentic commerce.
Why This Is Required
If you're building agentic shopping experiences in 2026, the standards are changing constantly.
OpenAI and Stripe update ACP. Google and Shopify refactor UCP. Stripe and Tempo add Hedera intents to MPP. Anthropic extends MCP. Cloudflare revises Web Bot Auth at the IETF. The Linux Foundation x402 Foundation ships new releases.
Each change affects how agents interact with your store, API, or data.
The information is public, but fragmented across open-source repos, spec sites, and vendor blogs. Updates land continuously, with no shared release cadence, labeling system, or notification standard.
Keeping up manually means tracking hundreds of pull requests across multiple protocols. That's why we're launching Protocol Tracker.
What's Being Tracked
16 protocols across 4 categories.
Commerce (3)
- ACP: Agentic Commerce Protocol from OpenAI and Stripe
- UCP: Universal Commerce Protocol from Google and Shopify with 20+ partners
- NVIDIA RAC: Reference implementation combining ACP and UCP via Docker Compose
These define how AI agents discover products, build carts, and complete checkout inside chat interfaces.
Payments (7)
- AP2: Google's Agent Payments Protocol
- x402: HTTP 402 standard from the Linux Foundation, originally from Coinbase
- MPP: Machine Payments Protocol from Stripe and Tempo
- Visa TAP: Trusted Agent Protocol
- Visa ICC: Intelligent Commerce SDK
- Verifiable Intent: Delegation spec from Mastercard and Google
- L402: HTTP 402 + macaroon payment standard from Lightning Labs
These protocols handle agent-authorized payments.
Connectors (2)
- MCP: Model Context Protocol from Anthropic, now under the Linux Foundation AAIF
- A2A: Agent2Agent Protocol, originally from Google, now supported by 150+ organizations including Amazon Web Services, Microsoft, Salesforce, and SAP
These provide agent-to-tool and agent-to-agent infrastructure.
Discovery (4)
- NLWeb: Microsoft framework that turns websites into natural-language MCP servers
- WebMCP: W3C browser integration draft for MCP
- llms.txt: Markdown index spec from Answer.AI
- Web Bot Auth: Cloudflare IETF draft for cryptographic bot identity
These protocols help agents discover, access, and authenticate web resources.
Each entry links to its primary GitHub repo and homepage.
