| snapshot_date,method_version,protocol,stage,count,denominator,percentage,evidence,definition,as_of |
| 2026-10-30,arc-method-2026.10,ucp,declared,,,,Not measured,/.well-known/ucp answered HTTP 200 with a body,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,ucp,valid,8184,10610,77.1,Measured,Profile passed ARC's validation,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,ucp,usable,7634,10610,72,Measured,The UCP catalog tool returned the tested product,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,ucp,transacts,7219,10610,68,Measured,UCP create_cart returned a checkout link,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,acp,declared,,,,Not measured,Public file at /.well-known/acp.json; not counted in this matrix,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,acp,valid,,,,Not measured,Not checked,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,acp,usable,,,,Not measured,Not checked,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,acp,transacts,,,,Not measured,Not checked,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,pap,declared,,,,Not measured,Live watch only; not saved,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,pap,valid,,,,Not measured,Not checked against draft 0.1,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,pap,usable,,,,Not measured,Not checked,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,pap,transacts,,,,Not measured,Not checked,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,webmcp,declared,7978,10610,75.2,Measured,WebMCP adapter found in server HTML,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,webmcp,valid,,,,Not measured,Not checked (no live browser session),2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,webmcp,usable,,,,Not measured,Not checked (no live browser session),2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,webmcp,transacts,46,61,75.4,Inferred,Index stores with WebMCP where at least one browser shopper reached the cart,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,mcp,declared,7750,10610,73,Measured,/api/mcp answered a tools/list request with tools,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,mcp,valid,7750,10610,73,Measured,tools/list parsed with at least one named tool,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,mcp,usable,7750,10610,73,Measured,"A tool or catalog answered on /api/mcp (on Shopify today, the policy and FAQ tool; or a catalog tool returned the tested product)",2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,mcp,transacts,,,,Not measured,"Of stores whose /api/mcp lists a cart tool, the cart tool returned a checkout link (stopped before payment). Not measured while no checked store lists one there.",2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,payments,declared,,,,Not measured,Not visible from outside,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,payments,valid,,,,Not measured,Not visible from outside,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,payments,usable,,,,Not measured,Not visible from outside,2026-10-30T22:42:22.000Z |
| 2026-10-30,arc-method-2026.10,payments,transacts,,,,Not measured,Not visible from outside,2026-10-30T22:42:22.000Z |
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