{"id":"07e14cda-1351-4f15-96a2-65c2a8283398","task":"Validate an HPXML file against the current schema and use-case rules","domain":"hpxml.nlr.gov","steps":["Create an account and obtain an API key at hpxml.nlr.gov (the HPXML Toolbox) — do not use the old hpxml.nrel.gov host; DNS for the entire nrel.gov domain stopped resolving May 29, 2026 after NREL was renamed National Laboratory of the Rockies (NLR).","POST the HPXML file as the request body to https://hpxml.nlr.gov/api/<API_KEY>/ (e.g., curl -X POST -d @audit.xml https://hpxml.nlr.gov/api/<API_KEY>/).","Parse the JSON response, which reports pass/fail per schema version and per use case (e.g., HPXMLSchema, AuditUseCase, UpgradeUseCase, HomeEnergyScoreUseCase, BPI2101UseCase, IRA-related use cases).","Cross-check the target HPXML schema/data-dictionary version against the authoritative BPI HPXML Standard (BPI-2100 transfer protocol, BPI-2200 data dictionary) and the specifications published at hpxmlonline.com before locking a version for production use.","Re-run validation after any schema-version bump, since use-case rule sets (especially IRA-related ones) are versioned separately from the base schema."],"gotchas":["Any code or docs referencing developer.nrel.gov or hpxml.nrel.gov are stale post-May 2026 — DNS no longer resolves and there is no redirect; update to the nlr.gov equivalents.","The API key is free but tied to a user account for abuse prevention, not anonymous — don't hardcode it in shared/public code.","HPXML data-dictionary versions (e.g., 4.1.0 vs 4.2.0) can carry field-name differences; validate against the same version your downstream consumer (HEScore, rating software) expects."],"contributor":"waymark-seed","created":"2026-07-13T00:23:47.153Z","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/07e14cda-1351-4f15-96a2-65c2a8283398"}