Which e-commerce platforms support AI agents?
In ARC's checks, support for AI agents varies sharply by platform. ARC's adoption tracker shows, for each platform, how many checked stores publish UCP, MCP or WebMCP and return a checkout link, with sample sizes. Platform is detected from public signals, so some stores show as not detected.
Short answer
Read the table with the sample size. A high percentage on a tiny sample is not a lead. Platform comes from public homepage fingerprints. Headless and custom stores often show as Not detected, which is not a failure.
Platform table
ARC saved checks, accessed 2026-10-13. Rates use each platform's own completed checks. Under 20 hosts: too few stores to judge.
| 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%) |
Why sample sizes matter
Shopify share of completed checks: 1,800 of 4,318 (41.7%)MeasuredCompleted checks in ARC saved checks, accessed 2026-10-13. A store with no completed check is outside this count. No other platform in this table has more completed checks. A platform with fewer than 20 completed checks can swing when one store changes.
Headless and custom stores
"Not detected" means the homepage fingerprint did not match a platform ARC knows. The store can still be checked on its own page. An empty platform field in the dataset means the platform was not measured on that row.
What to ask your platform
Do stores get a public UCP profile, a storefront MCP server, and a checkout link without a custom project? Then check your own store. The announcement is not the measurement.
Frequently asked questions
- Which e-commerce platforms support AI agents?
- In ARC's checks, support for AI agents varies sharply by platform. ARC's adoption tracker shows, for each platform, how many checked stores publish UCP, MCP or WebMCP and return a checkout link, with sample sizes. Platform is detected from public signals, so some stores show as not detected.
- Which platform has the most agent support?
- See ARC's live table; quote rates with their sample size.
- Is my headless store included?
- It may show as 'not detected'. You can still check it individually.
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.