Zephyr API

Returns the latest physical premium score, SRMC-implied price, and market conditions. Updated every 5 minutes.

Example request

curl -H "X-API-Key: zk_live_..." https://zephyr.markets/api/v1/premium

Example response

{
  "data": {
    "premium_score": -4.9,
    "direction": "SOFTENING",
    "implied_price_gbp_mwh": 78.19,
    "market_price_gbp_mwh": 94.27,
    "srmc_gbp_mwh": 99.97,
    "wind_gw": 6.71,
    "solar_gw": 0.0,
    "residual_demand_gw": 15.79,
    "regime": "transitional",
    "calculated_at": "2026-04-19T01:58:47Z"
  },
  "meta": {
    "model_version": "1.2.0",
    "generated_at": "2026-04-19T02:01:44Z",
    "endpoint": "/api/v1/premium"
  }
}

Query params: limit (integer, 1–50, default 10)

Returns the latest REMIT signals scored by Zephyr. Each signal represents a generation or interconnector outage with direction and confidence scoring.

Example request

curl -H "X-API-Key: zk_live_..." https://zephyr.markets/api/v1/signals?limit=3

Example response

{
  "data": [
    {
      "id": "e1e21761-97a5-418c-b002-6a583d4d5ccf",
      "type": "remit",
      "title": "DRAXX-2 — Generation Outage",
      "description": "DRAXX-2 derated by 645.0MW (645.0MW normal). Unplanned outage from 00:58 UTC 19 Apr to 13:01 UTC 20 Apr.",
      "direction": "bear",
      "source": "Elexon BMRS",
      "confidence": "HIGH",
      "created_at": "2026-04-19T00:26:34Z"
    }
  ],
  "meta": {
    "count": 1,
    "generated_at": "2026-04-19T02:08:05Z",
    "endpoint": "/api/v1/signals"
  }
}

Returns the latest snapshot of key market prices across GB power, European gas, carbon, and FX.

Example request

curl -H "X-API-Key: zk_live_..." https://zephyr.markets/api/v1/markets

Example response

{
  "data": {
    "n2ex_gbp_mwh": 94.27,
    "ttf_eur_mwh": 42.05,
    "nbp_pence_therm": 95.10,
    "uka_gbp_t": 48.66,
    "eua_eur_t": 76.47,
    "gbp_eur": 0.8717,
    "as_of": "2026-04-19T02:06:30Z"
  },
  "meta": {
    "generated_at": "2026-04-19T02:12:18Z",
    "endpoint": "/api/v1/markets"
  }
}

Query params: hours (integer, 1–168, default 48)

Returns hourly GB weather forecasts with implied wind and solar generation. Useful for anticipating residual demand and regime transitions.

Example request

curl -H "X-API-Key: zk_live_..." https://zephyr.markets/api/v1/weather?hours=3

Example response

{
  "data": [
    {
      "forecast_time": "2026-04-19T12:00:00Z",
      "wind_speed_100m_ms": 4.19,
      "wind_speed_10m_ms": 3.80,
      "wind_implied_gw": 8.90,
      "solar_radiation_wm2": 429.00,
      "solar_implied_gw": 7.16,
      "temperature_c": 8.30,
      "residual_demand_gw": 19.93
    }
  ],
  "meta": {
    "source": "Open-Meteo ECMWF",
    "hours": 3,
    "generated_at": "2026-04-19T11:24:06Z",
    "endpoint": "/api/v1/weather"
  }
}

Returns the latest EU gas storage fill levels by country. Updated daily from GIE AGSI.

Example request

curl -H "X-API-Key: zk_live_..." https://zephyr.markets/api/v1/storage

Example response

{
  "data": [
    { "location": "DE", "full_pct": 23.42, "report_date": "2026-04-18" },
    { "location": "FR", "full_pct": 27.50, "report_date": "2026-04-18" },
    { "location": "IT", "full_pct": 45.91, "report_date": "2026-04-18" },
    { "location": "NL", "full_pct": 7.39, "report_date": "2026-04-18" },
    { "location": "AT", "full_pct": 36.06, "report_date": "2026-04-18" }
  ],
  "meta": {
    "source": "GIE AGSI",
    "generated_at": "2026-04-19T11:24:14Z",
    "endpoint": "/api/v1/storage"
  }
}