{"ok":true,"backend_version":"1.0.0-plan-d","backend_mode":"live","timestamp":"2026-06-01T13:34:10.709Z","edge_region":"CMH","vendors_total":13,"vendors_ready":4,"vendor_status":{"doh_aadt":{"status":"up","note":"open data baseline available"},"doh_cctv":{"status":"up","note":"internal asset (synthetic placeholder)"},"itic_opendata":{"status":"up","note":"iTIC Open Data (CC-BY 4.0) — no key needed · always available"},"doh_tims2":{"status":"prompt_per_request","note":"TIMS2 realtime API ต้องกรอก username/password ทุกครั้งที่ใช้ (ไม่บันทึก)"},"doh_tims2_aadt":{"status":"up","note":"🏆 Tier 1 · DOH TIMS2 Report 4 (ขท.สมุทรปราการ 13 segments, 2021-2025) — embedded dataset, instant lookup, no key needed"},"tomtom":{"status":"no_key","note":"no API key — will return synthetic baseline"},"here":{"status":"no_key","note":"no API key — will return synthetic baseline"},"itic":{"status":"no_key","note":"no API key — will return synthetic baseline"},"mapbox":{"status":"no_key","note":"no API key — will return synthetic baseline"},"longdo":{"status":"no_key","note":"no API key — will return synthetic baseline"},"dlt":{"status":"no_key","note":"no API key — will return synthetic baseline"},"strava":{"status":"no_key","note":"no API key — will return synthetic baseline"},"google":{"status":"no_key","note":"no API key — will return synthetic baseline"}},"notes":["Backend runs on Cloudflare Pages Functions free tier (100k req/day).","Vendor API keys are read from request headers (X-TTVE-Key-*) — never stored.","Fusion uses Yang 2014 Kalman; cross-validation uses DMRB GEH."]}