# Protocol Tracker

> Live tracker for agentic commerce protocols. Every spec change, GitHub PR, and release — pulled directly from upstream repos, sorted by actual merge time, no LLM rewrites. Updated continuously.

URL: https://www.tryrankly.com/protocol-tracker

## What this is

A single feed of every merged pull request, release, and spec change across the protocols that govern AI commerce. Data comes verbatim from GitHub — titles, merge dates, authors, SHAs are exactly what's on the upstream repo, with light cleanup (conventional-commit prefixes stripped, `(#NNN)` suffixes removed) so the feed reads like product release notes instead of git log.

## Tracked protocols (16, across 4 categories)

### Commerce (3)
- **ACP** — Agentic Commerce Protocol (OpenAI + Stripe). Repo: agentic-commerce-protocol/agentic-commerce-protocol. Launched September 29, 2025.
- **UCP** — Universal Commerce Protocol (Google + Shopify, with Etsy, Wayfair, Target, Walmart and 20+ partners). Repo: Universal-Commerce-Protocol/ucp. Launched January 11, 2026.
- **NVIDIA RAC** — Retail Agentic Commerce Blueprint. NVIDIA's open reference implementation of ACP + UCP. Repo: NVIDIA-AI-Blueprints/Retail-Agentic-Commerce. Launched January 5, 2026.

### Payments (7)
- **AP2** — Agent Payments Protocol (Google). Repo: google-agentic-commerce/AP2. Launched September 16, 2025.
- **x402** — Payments for HTTP (Coinbase, now Linux Foundation x402 Foundation). Repo: x402-foundation/x402. Launched May 6, 2025.
- **MPP** — Machine Payments Protocol (Stripe + Tempo). Repo: tempoxyz/mpp-specs. Mainnet launch March 18, 2026.
- **Visa TAP** — Trusted Agent Protocol (Visa). Repo: visa/trusted-agent-protocol. Launched October 2025.
- **Visa ICC** — Visa Intelligent Commerce (broader Visa AI agent platform). Repo: visa/ai. Launched April 8, 2026.
- **Verifiable Intent** — Mastercard + Google cryptographic delegation spec. Repo: agent-intent/verifiable-intent. Launched March 2026.
- **L402** — Lightning HTTP 402 (Lightning Labs). Repo: lightninglabs/L402. Production since April 2020.

### Connectors (2)
- **MCP** — Model Context Protocol (Anthropic + Linux Foundation AAIF). Repo: modelcontextprotocol/modelcontextprotocol. Launched November 25, 2024.
- **A2A** — Agent2Agent Protocol (Google → Linux Foundation, 150+ orgs). Repo: a2aproject/A2A. Launched April 9, 2025.

### Discovery — AEO / GEO / AXP (4)
- **NLWeb** — Natural Language Web (Microsoft). Repo: nlweb-ai/NLWeb. Launched May 19, 2025.
- **WebMCP** — W3C draft bringing MCP to the browser. Repo: webmachinelearning/webmcp. Launched August 12, 2025.
- **llms.txt** — Answer.AI's /llms.txt site index spec. Repo: AnswerDotAI/llms-txt. Launched September 2024.
- **Web Bot Auth** — IETF draft for cryptographic bot identity (Cloudflare). Repo: cloudflare/web-bot-auth. Launched July 2025.

## How to use it

- The protocol tracker page groups protocols into 4 tabs: Commerce, Payments, Connectors, Discovery.
- Each card shows: provider favicons, the protocol's full name, a sparkline of merge activity over the last 14 days, total merged PR count, the latest merged PR (verbatim title + actual merge date + author), and a recent-PR list. Click any PR row to open a side panel with the full PR body, labels, commit SHA, and a "View on GitHub" link.
- "Show all N merged PRs" opens a side panel with the protocol's most recent 50 merged PRs.
- Provider favicons hover to reveal the company name.
- The page also offers an email subscription for "alert me when a tracked protocol publishes a new PR."

## Why we built it

Tracking 16 protocols across 4 categories by hand means watching ~20 GitHub repos, 8 spec websites, and 10+ vendor blogs. Engineers and PMs working on agentic commerce shouldn't need to do that — a single feed makes it possible to scan "what shipped this week across the agentic-commerce stack" in 30 seconds.

## Related

- [UCP/ACP Validator](https://www.tryrankly.com/ucp-validator) — scan any merchant domain for UCP and ACP compliance.
- [Agent Directory](https://www.tryrankly.com/agent-directory) — directory of 4,000+ AI agents, crawlers, and bots that visit websites.
- [Rankly blog](https://www.tryrankly.com/blogs) — long-form analysis of the agentic commerce landscape.