UCPChecker/ucp-merchants

UCP Merchant Directory

A dataset of e-commerce merchants and their Universal Commerce Protocol (UCP) adoption status, updated monthly.

UCP is an open standard that allows AI agents to interact with online stores — browsing products, managing carts, and completing checkout programmatically. This dataset tracks which merchants have implemented UCP and what capabilities they expose.

Dataset Description

Each row represents one merchant domain as of the export date. Only publicly-verified or checked merchants are included. Domains in our do-not-publish list are excluded.

Columns

Column	Type	Description
domain	string	Merchant domain (e.g. example.com)
status	string	UCP status: verified, not_detected, invalid, blocked, unreachable, pending
ucp_url	string	URL where the UCP manifest was found
http_status	integer	HTTP response code from the manifest URL
version	string	UCP spec version declared in the manifest
has_checkout	boolean (0/1)	Merchant exposes a checkout capability
has_identity_linking	boolean (0/1)	Merchant exposes identity linking
has_cart_management	boolean (0/1)	Merchant exposes cart management
has_order	boolean (0/1)	Merchant exposes order management
has_payment_token	boolean (0/1)	Merchant exposes payment token capability
capability_count	integer	Total number of UCP capabilities exposed
ai_bot_policies	JSON string	AI bot access policies from robots.txt / manifest
transports	JSON string	Supported transport protocols (MCP, REST, etc.)
last_checked_at	ISO 8601	When the domain was last checked
last_success_at	ISO 8601	When the domain last returned a valid UCP manifest

Status Values

• verified — A valid, parseable UCP manifest was found at the domain
• not_detected — No UCP manifest found at standard paths
• invalid — A manifest was found but failed validation
• blocked — The domain actively blocks AI/bot access
• unreachable — The domain could not be reached
• pending — Queued for checking, not yet processed

Source

Data is collected by UCP Checker, which crawls merchants and validates their UCP manifests against the published spec. Checks are run continuously; this dataset is exported monthly.

Usage

import pandas as pd

df = pd.read_csv("ucp-merchants-2026-03-01.csv")

# Verified merchants with checkout capability
checkout_ready = df[(df['status'] == 'verified') & (df['has_checkout'] == 1)]
print(f"{len(checkout_ready)} merchants support AI checkout")

# Adoption by capability
for col in ['has_checkout','has_cart_management','has_order','has_identity_linking','has_payment_token']:
    n = df[col].sum()
    print(f"{col}: {n}")

License

Data is released under CC BY 4.0. Attribution: UCP Checker (ucpchecker.com).

Citation

@misc{ucpchecker2026,
  title   = {UCP Merchant Directory},
  author  = {UCP Checker},
  year    = {2026},
  url     = {https://ucpchecker.com}
}