Belgium EPEX Day-Ahead Historical Price API

You need reliable historical day-ahead power prices for Belgium to drive finance workflows like mark-to-market, P&L explain, or strategy backtests. By the end of this guide, you will request and parse the Energy API’s Belgium EPEX Day-Ahead timeseries (symbol EPEX_BE_DA), extract price points in EUR/MWh, and structure them for analytics.

What you are pulling: Belgium EPEX Day-Ahead

This guide focuses on a single Energy API symbol and how to operationalize it in finance use cases.

• Symbol name: Belgium EPEX Day-Ahead
• Symbol code: EPEX_BE_DA
• Unit: EUR/MWh
• Endpoint: GET /api/v1/timeseries
• Auth: api_key query parameter (value must be YOUR_API_KEY only in examples)

You will request a calendar date range and parse the response from fields under rates, dates, and currencies. You should read rates.EPEX_BE_DA keyed by date, and also verify currencies.EPEX_BE_DA is EUR for unit consistency with finance systems and models.

Access, authentication, and docs

Authentication uses a query parameter api_key. In all examples below, replace YOUR_API_KEY with your real key. Do not include additional base parameters unless your workflow specifically requires it; and do not pass base=USD when you also need symbols like TTF_GAS or EUA_CO2 in the same call.

To start:

• Create your account: Register
• Review endpoint details: Documentation

Quick start: official cURL and JSON

Copy and run the official cURL. It hits the real endpoint and requests the Belgium EPEX Day-Ahead symbol for a specific period.

curl -G "https://energy-api.com/api/v1/timeseries" --data-urlencode "start=2026-01-01" --data-urlencode "end=2026-03-31" --data-urlencode "symbols=EPEX_BE_DA" --data-urlencode "api_key=YOUR_API_KEY"

The following is the official sample JSON block to illustrate the response shape. Note the symbol inside this sample is different; you will still parse the same fields when working with EPEX_BE_DA.

{
"success": true,
"date": "2026-10-17",
"base": "EUR",
"rates": {
"OMIE_ES_DA": 107.1542
},
"dates": {
"OMIE_ES_DA": "2026-10-17"
},
"currencies": {
"OMIE_ES_DA": "EUR"
},
"base_filter_note": null
}

Real API response snapshot for EPEX_BE_DA

Below is a real snapshot provided for EPEX_BE_DA. When parsing in code, treat this identically to the structure above but read the EPEX_BE_DA keys.

Response anatomy for finance workflows

Key fields you will use when working with Belgium EPEX Day-Ahead:

• base: The monetary base for the response. For EPEX_BE_DA this will be EUR.
• rates.EPEX_BE_DA: The price value in EUR/MWh for the keyed date(s).
• dates.EPEX_BE_DA: The ISO date (YYYY-MM-DD) associated with the rate.
• currencies.EPEX_BE_DA: The currency code of the series; expect EUR for this symbol.

Store the value as a floating-point numeric in your ledger or analytics table, with units explicitly recorded as EUR/MWh. The date should be treated as a local calendar date label for the day-ahead auction product, not a UTC timestamp. If you align cross-market series, normalize everything to a canonical calendar (e.g., EU calendar) and retain the symbol code to avoid mixing products.

Python example: fetch and normalize EPEX_BE_DA

This sample requests a date range, validates currency and base, and structures the output for analytics. It avoids hard-coding any invented price.

import requests
from datetime import date

API_URL = "https://energy-api.com/api/v1/timeseries"

params = {
"start": "2026-01-01",
"end": "2026-03-31",
"symbols": "EPEX_BE_DA",
"api_key": "YOUR_API_KEY"
}

resp = requests.get(API_URL, params=params, timeout=30)
resp.raise_for_status()
data = resp.json()

# Basic checks
if not data.get("success", False):
raise RuntimeError("API call did not succeed")

if data.get("base") != "EUR":
# For finance normalization, you may enforce base EUR for this symbol
raise ValueError(f"Unexpected base: {data.get('base')}")

# Extract values
rates = data.get("rates", {})
dates_map = data.get("dates", {})
currencies = data.get("currencies", {})

symbol = "EPEX_BE_DA"
if symbol not in rates:
raise KeyError(f"Missing {symbol} in rates")

if currencies.get(symbol) != "EUR":
raise ValueError(f"Unexpected currency for {symbol}: {currencies.get(symbol)}")

record = {
"symbol": symbol,
"date": dates_map.get(symbol), # e.g., "2026-02-10" (will be present for returned day)
"price_eur_per_mwh": rates.get(symbol),
"currency": currencies.get(symbol)
}

# At this point, 'record' can be written to a data lake, warehouse, or a positions P&L calc
print(record)

Working with ranges and timeseries

The endpoint accepts start and end as YYYY-MM-DD. Always specify both for reproducible analytics in finance backtests and risk reports. When requesting longer spans, consider batching by quarter or year to keep response sizes predictable for downstream processing and caching layers.

If you are ingesting multiple power or commodities series together, be explicit with symbols and avoid applying a different base parameter that could remap values. Specifically: do not pass base=USD when you also need TTF_GAS or EUA_CO2 in the same call. Keep the monetary base and units aligned (EUR base, EUR/MWh units) to prevent valuation errors.

Practical details that save time

• Units: EPEX_BE_DA is in EUR/MWh. Keep units in your schema and aggregation logic.
• Base currency: Response base is EUR. Confirm base == EUR before persisting.
• Dates and timezone: dates fields are ISO calendar dates (YYYY-MM-DD). Treat them as day labels for the day-ahead product; avoid reinterpreting as a UTC timestamp for intraday alignment.
• Non-trading days and gaps: Some dates may not appear in the results you requested. Do not forward-fill blindly in P&L; use explicit data completeness checks per date.
• Caching: Cache immutable historical responses by (start, end, symbols, base). This stabilizes backtests and reduces repeated API calls.
• Pagination: The provided endpoint parameters here do not include explicit pagination details. If your ranges are large, split them by month/quarter to keep payloads small and predictable.

Validation and downstream finance alignment

For finance-grade pipelines, validate and reconcile your series at each step:

• Schema consistency: symbol (EPEX_BE_DA), date, value (float), currency (EUR), unit (EUR/MWh).
• Completeness: Ensure all expected calendar dates exist before running VaR/greeks/P&L explain. Flag and quarantine missing dates.
• Idempotence: Store immutable snapshots keyed by as_of date (the top-level date field in the response) to ensure reproducibility across runs.
• Transformations: Avoid implicit conversions; if you must convert currencies for a finance report, document the FX curve and valuation timestamp used.

Error handling and troubleshooting

• HTTP errors: Non-2xx indicates network/auth/parameter issues. Log request params and response body.
• Auth failures: Confirm api_key is passed as a query parameter and is active.
• Unexpected base or currency: Enforce base == EUR and currencies.EPEX_BE_DA == EUR. If not, abort the job to prevent incorrect marks.
• Empty rates: Check that symbols includes EPEX_BE_DA and the requested date range is valid.

Pricing and trial

You can start with the Starter plan at $19.99/mo. A trial is available for 7 days with 50 calls, which is typically enough to validate ingestion, backfill a small historical window, and wire your finance dashboards.

FAQ

How do I request a historical range for Belgium EPEX Day-Ahead?
Use GET /api/v1/timeseries with start, end, symbols=EPEX_BE_DA, and api_key. Parse rates.EPEX_BE_DA and dates.EPEX_BE_DA for your table.

What units should I store for this symbol?
Store values as EUR/MWh. Keep a units column to avoid accidental mixing with other commodities or power products.

How do I ensure my finance reports are consistent?
Validate base == EUR and currencies.EPEX_BE_DA == EUR. Cache responses by as_of date and range, and avoid forward-filling missing dates in P&L without explicit approval.

Can I combine this with gas or carbon series in the same call?
You can request multiple symbols, but do not pass base=USD when you also need TTF_GAS or EUA_CO2. Keep the base and units consistent to prevent valuation drift.

Where can I find parameter details or additional symbols?
See the Documentation for the full parameter descriptions and symbol catalog.

Ready to wire Belgium EPEX Day-Ahead into your finance stack? Create your account and get an API key here: Register. Then copy the cURL above, verify EUR/MWh handling, and ship your first backtest or P&L pipeline.