UCP adoption & ecosystem stability
Real-time monitoring data for the Universal Commerce Protocol. 22,636 domains tracked, 18,405 verified, updated every 24 hours. See runtime performance grades on the leaderboard.
Last updated: Sep 28, 2026 · 8:48 PM UTC
Composite health score weighing endpoint verification rates, response latency, freshness, reachability, and state transition volatility across the entire monitored ecosystem.
Stores with valid UCP manifests, parseable JSON, and required spec fields present — 81% of all monitored domains.
Total stores in the crawl index, growing weekly via the directory, browser extension, and submissions.
Verified stores re-observed in the last 24 hours. Higher freshness means more reliable real-time data. A further 0.3% of stores could not be re-observed in the window (rate limited or unreachable edges); their last observation stands.
Verified stores already running 2026-08-25 — the newest published UCP spec version. Lower numbers mean migration is still in progress across the ecosystem.
Mean manifest fetch time across verified stores. Agents typically abandon requests after 2 seconds.
Verified stores responding in under 200ms — the agent-ready latency threshold.
Verified stores responding slower than 800ms — high risk of agent abandonment.
Status Breakdown
All 22,636 monitored domains by check status
UCP Score Distribution
A 0–100 grade for agent-readiness across 22,593 scored stores. Bands match Lighthouse + SSL Labs — A is deliberately hard to earn. Get a score for any domain →
Spec Version Distribution
UCP versions declared by verified merchants — version alignment indicates ecosystem readiness for protocol upgrades
Capability Adoption
UCP capabilities declared by verified merchants — coverage indicates how much of the protocol surface area the ecosystem supports
Strategic Primitives
The four capabilities that gate deeper agentic commerce — AP2 mandate, identity linking, buyer consent, embedded checkout. Adoption is small today; every new merchant on this list is a meaningful signal for the protocol's maturity.
AI Bot Block Rates
Percentage of monitored domains blocking each AI agent via robots.txt or other policy
Endpoint State Transitions
When a domain's UCP status degrades between crawls — losing verification, becoming unreachable, or getting blocked — it signals protocol instability. Our stability score weighs these failures while rewarding positive transitions like new verifications.
Get the agentic commerce digest every Monday
Real adoption data, ecosystem trends, new spec versions, and the stores that broke or recovered this week. Read by founders and engineers building the next generation of commerce.