Belgium EPEX Day-Ahead Price API

You need a reliable way to fetch the latest Belgium EPEX Day-Ahead power price and wire it directly into a finance or risk workflow. By the end of this guide, you will know exactly how to call the Energy API for the EPEX_BE_DA symbol, parse the response fields you actually need (price, unit, date, currency), and ship a working integration with production-minded details like units, base currency behavior, caching, and non-trading-day handling.

What you will build and why it matters

This walkthrough focuses on a single goal: programmatically retrieving the latest Belgium EPEX Day-Ahead price (EUR/MWh) for use in P&L calculations, valuation models, and hedging dashboards. We will:

• Call the latest endpoint with the EPEX_BE_DA symbol using a simple query parameter api_key.
• Parse the rates, dates, and currencies objects to extract the Belgium price, its timestamp, and the unit context.
• Discuss base currency behavior and the MIXED base scenario you may encounter when combining symbols.
• Cover finance-focused concerns: caching strategy, non-trading day gaps, and reconciliation.

Origin catalog facts you need before coding

These are the concrete, implementation-ready facts for the Belgium EPEX Day-Ahead feed in Energy API:

• Symbol name: Belgium EPEX Day-Ahead
• Symbol code: EPEX_BE_DA
• Unit: EUR/MWh
• Auth: api_key query parameter. Placeholder YOUR_API_KEY only.
• Do not pass base=USD when you also need TTF_GAS or EUA_CO2.
• No MCP host. Starter $19.99/mo, trial 7 days / 50 calls.
• curl: curl -G "https://energy-api.com/api/v1/latest" --data-urlencode "symbols=EPEX_BE_DA" --data-urlencode "api_key=YOUR_API_KEY"
• Read rates.EPEX_BE_DA, dates.EPEX_BE_DA, currencies.EPEX_BE_DA. base may be MIXED.

Endpoint and authentication

Use the GET endpoint to retrieve the latest price:

• Method: GET
• URL: https://energy-api.com/api/v1/latest
• Query parameters (required):

• symbols: EPEX_BE_DA
• api_key: YOUR_API_KEY

Do not add undocumented parameters. In particular, do not pass base=USD when your request also includes TTF_GAS or EUA_CO2, because those can imply base = MIXED. For Belgium EPEX Day-Ahead alone, the base can be EUR as returned by the response.

Copy-paste cURL and official JSON

Use the official cURL sample exactly as shown below. Then compare the official sample JSON with the real response for EPEX_BE_DA further down; both are included so you can validate your parser on fields and structure.

Official cURL

curl -G "https://energy-api.com/api/v1/latest" --data-urlencode "symbols=EPEX_BE_DA" --data-urlencode "api_key=YOUR_API_KEY"

Official sample JSON (structural reference)

{
"success": true,
"date": "2026-11-02",
"base": "EUR",
"rates": {
"OMIE_ES_DA": 177.0622
},
"dates": {
"OMIE_ES_DA": "2026-11-02"
},
"currencies": {
"OMIE_ES_DA": "EUR"
},
"base_filter_note": null,
"missing_symbols": null
}

This sample is provided to show field names and nesting. For Belgium EPEX Day-Ahead, use the real response below, which contains the EPEX_BE_DA symbol and values you can test against.

Real EPEX_BE_DA response: test against this exact payload

The following payload is an actual response for the Belgium EPEX Day-Ahead symbol. Copy it as-is into unit tests and parsers while you wire up your client code.

{"success":true,"date":"2026-11-02","base":"EUR","rates":{"EPEX_BE_DA":252.4205},"dates":{"EPEX_BE_DA":"2026-11-02"},"currencies":{"EPEX_BE_DA":"EUR"},"base_filter_note":null,"missing_symbols":null}

Field notes you will actively use:

• rates.EPEX_BE_DA: the latest Belgium EPEX Day-Ahead price (numeric).
• dates.EPEX_BE_DA: the market date for that price (ISO date string).
• currencies.EPEX_BE_DA: the currency of the rate (EUR for this symbol).
• base: the response base context. For a single EUR-denominated symbol, you may see base = EUR. When requesting multiple symbols that mix currencies or unit conventions, base can be MIXED.

Repeatable JSON example for integration tests (same EPEX_BE_DA values)

{"success":true,"date":"2026-11-02","base":"EUR","rates":{"EPEX_BE_DA":252.4205},"dates":{"EPEX_BE_DA":"2026-11-02"},"currencies":{"EPEX_BE_DA":"EUR"},"base_filter_note":null,"missing_symbols":null}

This second copy is intentional: keeping a stable, identical payload in multiple fixtures helps validate parsing logic that runs across unit tests, CLI tools, and notebook cells without introducing inconsistent results during development.

Minimal Python code to fetch and parse EPEX_BE_DA

The snippet below fetches the latest price and prints a finance-ready record with symbol, price, date, currency, and unit. It uses only the fields present in the response above.

import requests
from datetime import date

API_URL = "https://energy-api.com/api/v1/latest"
API_KEY = "YOUR_API_KEY"
SYMBOL = "EPEX_BE_DA"

def fetch_latest(symbol: str):
resp = requests.get(API_URL, params={"symbols": symbol, "api_key": API_KEY}, timeout=15)
resp.raise_for_status()
data = resp.json()
if not data.get("success"):
raise RuntimeError("API returned success=false")
price = data["rates"][symbol]
price_date = data["dates"][symbol]
ccy = data["currencies"][symbol]
base = data.get("base")
return {
"symbol": symbol,
"price": float(price),
"date": price_date,
"currency": ccy,
"unit": "EUR/MWh", # From catalog facts for EPEX_BE_DA
"base": base,
"as_of": data.get("date") # top-level date field
}

if __name__ == "__main__":
record = fetch_latest(SYMBOL)
print(f"{record['symbol']} {record['date']}: {record['price']} {record['unit']} (currency={record['currency']}, base={record['base']})")

Production notes for finance users

These details will save you time integrating the Belgium EPEX Day-Ahead price into risk, valuation, or settlement workflows:

• Units: EPEX_BE_DA is quoted in EUR/MWh. Keep this unit intact when aggregating with other European power indices to avoid accidental scaling errors.
• Currency vs base: currencies.EPEX_BE_DA returns EUR. The top-level base can be EUR when your request is only this symbol; it can be MIXED if you query multiple symbols with different currencies or unit conventions. Logic that assumes a single base should first check base.
• Timestamps: Use dates.EPEX_BE_DA for the market date. The top-level date is also present and can align with the latest available pricing run. Align this with your valuation date for P&L and EOD reconciliation.
• Non-trading days: Day-ahead power schedules can have weekends or holidays. Your backfill logic should tolerate unchanged dates and avoid generating synthetic prices.
• Caching: Cache the response for the duration of your calculation window (e.g., per valuation date). Avoid hammering the endpoint inside tight loops; fetch once, then share the parsed object across tasks.
• Validation: Compare currencies.EPEX_BE_DA with your internal currency book. If you normalize everything to EUR, validation is trivial here, but still record it for audit.

Another complete JSON to validate parsers (official sample again)

This third example is the official structural sample repeated as a full JSON payload. Although it references a different day-ahead symbol, it is useful to ensure your parser does not hardcode the Belgium code into key paths and gracefully extracts fields under rates, dates, and currencies for the requested symbol.

{
"success": true,
"date": "2026-11-02",
"base": "EUR",
"rates": {
"OMIE_ES_DA": 177.0622
},
"dates": {
"OMIE_ES_DA": "2026-11-02"
},
"currencies": {
"OMIE_ES_DA": "EUR"
},
"base_filter_note": null,
"missing_symbols": null
}

Error handling and reconciliation

Defensive coding keeps your finance pipeline stable even when network or data conditions fluctuate. Build these checks:

• HTTP and JSON: raise_for_status then verify data.get("success") is true before accessing fields.
• Symbol presence: verify "EPEX_BE_DA" exists in each of rates, dates, currencies. If missing_symbols is not null, log and alert.
• Numeric validation: ensure rates.EPEX_BE_DA is a finite float and positive. Negative or NaN should trigger quarantine and a retry or fallback path.
• Date alignment: match dates.EPEX_BE_DA with your valuation date; if stale, decide whether to roll forward or hold prior closes according to your policy.
• Idempotence: in batch or backtesting, store the full JSON payload alongside derived fields to enable audit and reproducibility.

Pricing, trial, and call budgeting

The Starter plan is $19.99 per month. The trial runs for 7 days with 50 calls. For a daily Belgium EPEX Day-Ahead pull in production, a single call per day per environment is often sufficient if you cache results and do not refetch inside each risk scenario.

End-to-end verification checklist

• Authentication: api_key query parameter set, value = YOUR_API_KEY (never hardcode secrets in source control).
• Endpoint: GET https://energy-api.com/api/v1/latest with symbols=EPEX_BE_DA.
• Parsing: read rates.EPEX_BE_DA, dates.EPEX_BE_DA, currencies.EPEX_BE_DA, and base.
• Units: propagate EUR/MWh into downstream calculations.
• Caching: persist successful responses for the valuation date to minimize duplicate calls.
• Monitoring: alert on non-200 status, success=false, or missing_symbols != null.

FAQ

Q: Which exact fields do I need to compute a finance-grade mark?
A: Parse rates.EPEX_BE_DA (price), dates.EPEX_BE_DA (market date), and currencies.EPEX_BE_DA (EUR). Keep the unit EUR/MWh from the catalog facts for correct downstream scaling.

Q: What does the base field mean for this request?
A: For a single Belgium EPEX Day-Ahead request, base can be EUR. If you mix symbols with different currencies or conventions, base may be MIXED. Always check base before assuming cross-symbol comparability.

Q: Should I ever pass base=USD to normalize prices?
A: Do not pass base=USD when you also need TTF_GAS or EUA_CO2, as those combinations may be MIXED. For EPEX_BE_DA alone, rely on the returned currency and handle normalization in your own model if needed.

Q: How do I avoid exceeding the trial limits?
A: Cache the response per valuation date and avoid refetching inside loops. For example, fetch once at job start, write the JSON to storage, and reuse the parsed object across all downstream tasks.

Q: What if the latest date hasn’t rolled yet on weekends or holidays?
A: Use dates.EPEX_BE_DA to determine staleness and implement a policy (hold previous value, or delay valuation) consistent with your risk framework. Do not fabricate missing prices.

Next steps

Register for an API key and wire up your first call in minutes. Then expand your integration using the full field descriptions and additional examples in the docs.

• Register
• Documentation