Open Data — Permit Change Archive (v1)

CSV and JSON exports of 1026 tracked official sources across 50 jurisdictions: current extracted values, full change history, and the capture log. Every row carries source URL, capture time, HTTP status and extractor version.

Endpoints

PathContents
/data/v1/index.jsonEndpoint list (machine-readable)
/data/v1/stats.jsonDated statistics for the current quarter, computed from the archive
/data/v1/jurisdictions.{csv,json}Tracked jurisdictions with capture and change counts
/data/v1/sources.{csv,json}Every tracked source, cadence, last status, capture counts
/data/v1/changes.{csv,json}All detected changes, all confidences — filter with ?min_confidence=0.7, ?since=YYYY-MM-DD
/data/v1/{slug}/facts.{csv,json}Latest value per source and field for one jurisdiction
/data/v1/{slug}/changes.{csv,json}Change history for one jurisdiction
/data/v1/{slug}/snapshots.{csv,json}Capture log (every fetch attempt, including failures)
/data/v1/raw/{snapshot_id}The archived bytes of one capture, exactly as served by the jurisdiction

Confidence: values ≥ 0.7 are shown on the site as facts; lower values are signals (e.g. "the set of dollar amounts on the fee page changed") and are exported with their confidence so you can apply your own threshold. License: CC BY 4.0 — cite "BuildPermitGuide.com permit change archive" with the capture date. Tracking since September 9, 2026.

Per-jurisdiction exports