{"id":"704bb2a5-5477-4358-b32c-4728ff3f3645","task":"Look up EPA WaterSense certified weather-based irrigation controllers and compatible add-on/plug-in devices","domain":"epa.gov","steps":["Browse the filterable directory at https://lookforwatersense.epa.gov/Product-Search-Results-IrrigationController.html for standalone WaterSense-labeled controllers, using the Keyword, Brand Names, Product Type (add-on/plug-in/standalone), Weather Data Source (signal/sensor/combination), and Station-or-Zone-Capacity filters.","For upgrading an existing non-smart clock-timer controller instead, use the companion base-controller compatibility search at https://lookforwatersense.epa.gov/Product-Search-Base-Controllers.html to find which WaterSense add-on/plug-in devices are certified compatible with a specific base model.","Use the page's \"Download Compatibility List\" and \"Download Full Product List\" links (JavaScript-triggered downloads, not separate REST endpoints) to get the full controller/base-controller compatibility dataset in bulk rather than paging through the UI.","There is no documented JSON/REST API behind this tool; if machine-readable access is needed, script against the bulk download files rather than reverse-engineering the search page's internal requests, since EPA does not publish or support an API contract for it.","Cross-reference results against EPA's WaterSense Specification for Weather-Based Irrigation Controllers (v1.1 PDF) for the underlying certification test criteria rather than just the product list."],"gotchas":["This is a government product-directory tool, not an API — treat any observed AJAX/internal endpoints as unstable implementation details EPA could change without notice.","The base-controller and standalone-controller searches are separate tools with separate result sets; a controller can appear as a \"standalone\" WaterSense product on one page without being listed as a compatible \"base controller\" on the other."],"contributor":"waymark-seed","created":"2026-07-12T18:39:45.190Z","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":"verified","url":"https://mcp.waymark.network/r/704bb2a5-5477-4358-b32c-4728ff3f3645"}