How many online stores support agentic commerce?
In ARC's sample of 4,318 completed store checks, 1,896 of 4,318 (43.9%) declare UCP, and 1,522 of 4,318 (35.2%) return an agent checkout link. These figures are ARC saved checks, accessed 2026-10-13. The weekly snapshot can differ. Live counts are on /protocols. These are dated counts under CC-BY-4.0. The sample is ARC's directory, not the whole web.
Headline numbers with n and date
ARC saved checks, accessed 2026-10-13
Declared: 1,896 of 4,318 (43.9%)Measured/.well-known/ucp answered HTTP 200 with a body
Valid: 1,862 of 4,318 (43.1%)MeasuredProfile passed ARC's validation
Usable: 1,717 of 4,318 (39.8%)MeasuredThe UCP catalog tool returned the tested product
Transacts: 1,522 of 4,318 (35.2%)MeasuredUCP create_cart returned a checkout link
Completed checks in this protocol count: 4,318. Attempted rows can be higher. Failed checks are not in the denominator, and they are not zeros.
Open-dataset snapshot: 2026-10-12Measured4,318 completed and 41 failed in the snapshot rails file, before any live overlay.
Declared vs working
Declared means the profile answered. Transacts means a checkout link came back. Quote both. A checkout link is not a purchase.
By platform
| Platform | Checked | Valid UCP | Checkout link | Storefront MCP | WebMCP | Checkout WebMCP | Blocks answer agents |
|---|---|---|---|---|---|---|---|
| Shopify | 1,800 | 1,720 of 1,800 (95.6%) | 1,470 of 1,800 (81.7%) | 1,696 of 1,800 (94.2%) | 1,680 of 1,800 (93.3%) | 1,536 of 1,536 (100%) | 11 of 1,798 (0.6%) |
| Not detected | 1,281 | 19 of 1,281 (1.5%) | 17 of 1,281 (1.3%) | 18 of 1,281 (1.4%) | 0 of 1,281 (0%) | Not measured | 79 of 1,276 (6.2%) |
| Salesforce Commerce Cloud | 159 | 0 of 159 (0%) | 0 of 159 (0%) | 0 of 159 (0%) | 0 of 159 (0%) | Not measured | 10 of 159 (6.3%) |
| WooCommerce | 78 | 0 of 78 (0%) | 0 of 78 (0%) | 0 of 78 (0%) | 0 of 78 (0%) | Not measured | 6 of 76 (7.9%) |
| Adobe Commerce / Magento | 68 | 0 of 68 (0%) | 0 of 68 (0%) | 0 of 68 (0%) | 0 of 68 (0%) | Not measured | 1 of 68 (1.5%) |
| Squarespace | 58 | 0 of 58 (0%) | 0 of 58 (0%) | 0 of 58 (0%) | 0 of 58 (0%) | Not measured | 1 of 58 (1.7%) |
| BigCommerce | 50 | 45 of 50 (90%) | 0 of 50 (0%) | 0 of 50 (0%) | 0 of 50 (0%) | Not measured | 1 of 50 (2%) |
| Wix | 29 | 22 of 29 (75.9%) | 0 of 29 (0%) | 0 of 29 (0%) | 0 of 29 (0%) | Not measured | 0 of 29 (0%) |
| PrestaShop (too few stores to judge) | 19 | 0 of 19 (0%) | 0 of 19 (0%) | 0 of 19 (0%) | 0 of 19 (0%) | Not measured | 0 of 19 (0%) |
| Lightspeed (too few stores to judge) | 2 | 0 of 2 (0%) | 0 of 2 (0%) | 0 of 2 (0%) | 0 of 2 (0%) | Not measured | 0 of 2 (0%) |
By protocol, and what is not measured
ARC saved checks, accessed 2026-10-13
Declared: Not measuredNot measuredNo public discovery marker to check
Valid: Not measuredNot measuredNot checked
Usable: Not measuredNot measuredNot checked
Transacts: Not measuredNot measuredNot checked
ARC saved checks, accessed 2026-10-13
Declared: Not measuredNot measuredNot visible from outside
Valid: Not measuredNot measuredNot visible from outside
Usable: Not measuredNot measuredNot visible from outside
Transacts: Not measuredNot measuredNot visible from outside
ARC saved checks, accessed 2026-10-13
Declared: Not measuredNot measuredLive watch only; not saved
Valid: Not measuredNot measuredNo published spec
Usable: Not measuredNot measuredNot checked
Transacts: Not measuredNot measuredNot checked
ACP, agent payments and PAP stay Not measured. Do not read those blanks as zero adoption, and do not cite a forecast as if ARC counted it.
How to cite ARC
ARC, arcreport.ai, accessed 2026-10-13, CC-BY-4.0. The dataset licence is CC-BY-4.0. Say the date, the denominator, and the evidence label. Machine-readable citation: CITATION.cff.
Frequently asked questions
- How many online stores support agentic commerce?
- In ARC's sample of 4,318 completed store checks, 1,896 of 4,318 (43.9%) declare UCP, and 1,522 of 4,318 (35.2%) return an agent checkout link. These figures are ARC saved checks, accessed 2026-10-13. The weekly snapshot can differ. Live counts are on /protocols. These are dated counts under CC-BY-4.0. The sample is ARC's directory, not the whole web.
- Is this all e-commerce?
- No. It's ARC's curated list plus stores people checked.
- Can I reuse the data?
- Yes, under CC-BY-4.0 with attribution.
- How often is it updated?
- Live pages hourly; the dataset weekly.
On ARC
Cite this: ARC, arcreport.ai, accessed 2026-10-13, CC-BY-4.0. Protocol figures: ARC saved checks, accessed 2026-10-13 (13 October 2026). Index browser figures: ARC open dataset snapshot 2026-10-12. Platform figures: ARC saved checks, accessed 2026-10-13.
Every figure is labelled Measured, Inferred or Not measured. Not measured is not zero. A missing result is not a mark against a store. ARC stops before payment.