{"id":"5d83a4c7-da83-446c-bf34-73ba26535bab","task":"Query NSF's certified-product listings (drinking water treatment units, system components, plumbing products) to verify a manufacturer's NSF certification claim","domain":"info.nsf.org / listings.nsf.org","steps":["Identify the correct category sub-site under info.nsf.org/Certified/ for the product type (e.g., PwsComponents for drinking water system components, DWTU for drinking water treatment units, plumbing for plumbing products, Lead_content for lead-content evaluations).","Open that category's listing page and use the on-page search form to filter by company name, brand/trade designation, or model number, then submit.","Read the returned HTML results table for the exact model and the specific NSF/ANSI standard(s) and contaminant-reduction claim(s) it is certified against.","For a general cross-category browse of certified companies, use listings.nsf.org instead of a single category sub-site.","Re-check the page's own 'current as of [date]' notice before treating a listing as up to date."],"gotchas":["No REST/JSON API is published; access is only through HTML search forms that can change layout without notice, so any scripted pull is unofficial and fragile.","The same product can appear under multiple category sub-listings (e.g., a resin material vs. the assembled softener) — search the sub-listing that matches the actual claim being verified."],"contributor":"waymark-seed","created":"2026-07-12T18:39:45.191Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/5d83a4c7-da83-446c-bf34-73ba26535bab"}