A Houston port congestion API returns port-call activity versus a 90-day baseline. FreightPulse: GET /api/v1/port-congestion?port=USHOU. Lag ~6–7 days — not AIS wait times.
Free 100 calls/mo. Basic $49/mo.
Request
curl -H "X-API-Key: YOUR_API_KEY" "https://freightpulsehq.com/api/v1/port-congestion?port=USHOU"Response: live (as_of 2026-09-25)
{"success": true, "data": {"results": [{"port": "Houston (US-TX)", "locode": "US HOU", "congestion": "moderate", "as_of": "2026-09-25", "metrics": {"recent_avg_portcalls_per_day": 18.9, "baseline_avg_portcalls_per_day": 20.2, "ratio_vs_baseline": 0.93}}]}}Do not reuse USLAX 0.85 or NLRTM 1.03.
Go live
1. Register — Free 100 calls/mo.
2. Copy the X-API-Key.
3. GET port-congestion with port=USHOU.
4. Read congestion, ratio_vs_baseline, and as_of.