Netherlands EPEX Day-Ahead (EPEX_NL_DA) Price API

You have a finance workflow that needs reliable, programmatic access to the Netherlands EPEX Day-Ahead electricity price for risk, PnL, and settlement analytics. By the end of this guide, you’ll discover the symbol, fetch the latest price for Netherlands EPEX Day-Ahead (EPEX_NL_DA), parse the response fields you actually need, and ship a robust integration that respects units, base currency, and scheduling constraints.

What you will build and why it matters for Finance

We will integrate a live Finance-grade energy price feed for the Netherlands EPEX Day-Ahead contract. You will:

• Verify the symbol exists via GET /api/v1/symbols so your deployment can sanity-check availability.
• Call the live Latest endpoint for EPEX_NL_DA using a simple, copy-pasteable curl.
• Parse rates, dates, and currencies while respecting the EUR/MWh unit and base currency handling.
• Embed the result into a finance pipeline (valuation, hedging dashboards, risk models) with caching and scheduling guardrails.

The symbol’s economics are explicit: Netherlands EPEX Day-Ahead (EPEX_NL_DA) reports in EUR/MWh and aligns with finance workflows where price normalization, currency handling, and day-ahead settlement logic are central.

Prerequisites and authentication

Authentication uses a simple API key as a query parameter. You pass api_key=YOUR_API_KEY in requests. No headers or OAuth flows are required for the examples shown here.

• Auth method: query parameter api_key
• Placeholder: YOUR_API_KEY (do not substitute a real key here)
• Plan notes: Starter $19.99/mo with a 7-day trial and 50 calls (as specified)

Important constraint for finance pipelines that blend power with other energy instruments: do not pass base=USD when you also need TTF_GAS or EUA_CO2 in the same query. Keep the base compatible with your symbol set, or resolve conversions in your own stack.

Discover the symbol with GET /api/v1/symbols

Before wiring your live jobs, verify that the target symbol is available to avoid runtime surprises. Use the symbols catalog endpoint to list the available instruments and confirm that the Energy symbol in the title is present:

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

Scan the output and confirm that the following entry exists:

• Symbol name: Netherlands EPEX Day-Ahead
• Symbol code: EPEX_NL_DA
• Unit: EUR/MWh

Once you’ve confirmed EPEX_NL_DA is listed, you’re ready to fetch live data. If you need more options or response shapes, see the Documentation.

Fetch the latest Netherlands EPEX Day-Ahead price (curl)

Use the official live latest endpoint. This is copy-pasteable, and you should keep the exact parameter names and ordering for parity with the examples below.

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

This request returns the latest price for EPEX_NL_DA. Note the base can be EUR or MIXED depending on the composition of your symbols list, but in this single-symbol request, base is explicitly EUR in the official sample.

Understand the JSON payload fields you actually need

The official sample below is the canonical shape to rely on when wiring your ETL or pricing functions. Copy it directly if you need to unit test your parser.

{
"success": true,
"date": "2026-10-02",
"base": "EUR",
"rates": {
"EPEX_NL_DA": 199.031
},
"dates": {
"EPEX_NL_DA": "2026-10-02"
},
"currencies": {
"EPEX_NL_DA": "EUR"
},
"base_filter_note": null
}

Key fields:

• rates.EPEX_NL_DA: The numeric price (199.031). Unit: EUR/MWh.
• dates.EPEX_NL_DA: The effective date for this quote ("2026-10-02"). Use this for valuation timestamps and audit logs.
• currencies.EPEX_NL_DA: The currency for the symbol ("EUR"), which should match the unit’s currency component.
• base: The response-level base currency. It may be EUR or MIXED depending on your symbols list.

In finance workflows, you typically persist rates.EPEX_NL_DA and dates.EPEX_NL_DA columns with a symbol key, plus the base and currency to avoid ambiguity in downstream reports.

Parse the response in Python

This snippet demonstrates a minimal and production-friendly approach: read the price, the instrument date, and the instrument currency. It also validates that the symbol is present in the result before proceeding with any valuation logic.

import os
import time
import json
import urllib.parse
import urllib.request

API_URL = "https://energy-api.com/api/v1/latest"
API_KEY = os.environ.get("ENERGY_API_KEY", "YOUR_API_KEY") # replace in your env, not here
SYMBOL = "EPEX_NL_DA"

def fetch_latest(symbol: str):
params = {
"symbols": symbol,
"api_key": API_KEY
}
url = f"{API_URL}?{urllib.parse.urlencode(params)}"
with urllib.request.urlopen(url, timeout=20) as resp:
raw = resp.read().decode("utf-8")
payload = json.loads(raw)
return payload

def extract_fields(payload: dict, symbol: str):
# Validate
if not payload.get("success", False):
raise RuntimeError("API returned success=false")
if "rates" not in payload or symbol not in payload["rates"]:
raise KeyError(f"Missing rate for {symbol}")
if "dates" not in payload or symbol not in payload["dates"]:
raise KeyError(f"Missing date for {symbol}")
if "currencies" not in payload or symbol not in payload["currencies"]:
raise KeyError(f"Missing currency for {symbol}")

# Extract
price = float(payload["rates"][symbol])
as_of_date = str(payload["dates"][symbol])
currency = str(payload["currencies"][symbol])
base = payload.get("base")
unit = "EUR/MWh" # from catalog for this symbol

return {
"symbol": symbol,
"price": price,
"as_of_date": as_of_date,
"currency": currency,
"base": base,
"unit": unit
}

if __name__ == "__main__":
data = fetch_latest(SYMBOL)
fields = extract_fields(data, SYMBOL)
print(json.dumps(fields, indent=2))

This example loads only a single symbol. If you decide to batch multiple symbols later, keep the “base may be MIXED” requirement in mind. For blended baskets, normalize values in your downstream pricing model rather than relying on base re-expression via the API, especially if you also include instruments like TTF_GAS or EUA_CO2 in the same call.

Official JSON sample for testing your parser (1/3)

Use the exact values below for test fixtures in CI. This is the official sample and must not be altered.

{
"success": true,
"date": "2026-10-02",
"base": "EUR",
"rates": {
"EPEX_NL_DA": 199.031
},
"dates": {
"EPEX_NL_DA": "2026-10-02"
},
"currencies": {
"EPEX_NL_DA": "EUR"
},
"base_filter_note": null
}

Production notes for Finance: units, bases, and scheduling

Units and currency:

• EPEX_NL_DA is quoted in EUR/MWh. Persist both currency and unit alongside the price to avoid unit confusion when aggregating across assets.
• The response includes currencies.EPEX_NL_DA and base. If you later query multiple instruments, base may be MIXED. Do not assume implicit conversions; perform your own conversion if you need cross-currency analytics.

Scheduling and non-trading days:

• Day-ahead power prices publish on a daily cycle. If your finance job runs intraday, expect the value to remain stable until the next publishing cycle.
• For weekends or holidays, confirm how your desk treats those dates in VaR or settlement logic (e.g., carry-forward vs. explicit weekend auctions). Use dates.EPEX_NL_DA to anchor the valuation date you record.

Caching and retries:

• Introduce a short-lived cache (e.g., 5–30 minutes) around the latest endpoint to reduce duplicate calls during batch runs.
• Implement idempotent retries with exponential backoff. Because the endpoint is read-only, standard retry policies are safe.

Pagination considerations:

• The latest endpoint returns the most recent record and does not require pagination. If you later access historical endpoints, consult the Documentation for any paging or date-range parameters.

Official JSON sample for testing your parser (2/3)

This is intentionally the same official example. Keep it as a separate fixture to test multiple consumers within your pipeline (e.g., risk module and PnL module) while ensuring consistent parsing expectations.

{
"success": true,
"date": "2026-10-02",
"base": "EUR",
"rates": {
"EPEX_NL_DA": 199.031
},
"dates": {
"EPEX_NL_DA": "2026-10-02"
},
"currencies": {
"EPEX_NL_DA": "EUR"
},
"base_filter_note": null
}

End-to-end verification with curl and field assertions

1) Run the live curl

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

2) Verify the essential fields

• rates.EPEX_NL_DA must be present and numeric.
• dates.EPEX_NL_DA must be present and ISO 8601 yyyy-mm-dd format.
• currencies.EPEX_NL_DA must be "EUR" given the instrument’s catalog unit.
• base should be EUR for a single-symbol call to EPEX_NL_DA in the official sample. If you batch symbols, base may be MIXED.

In CI, you can pin a mock to the official JSON and assert your parser behavior without hitting live endpoints. For production, log the received date and currency values to your audit trail alongside the price to debug any unit or date mismatches down the line.

Official JSON sample for testing your parser (3/3)

Use this identical block for an integration test in a separate microservice (e.g., a pricing API wrapper) to keep the contract stable across repos.

{
"success": true,
"date": "2026-10-02",
"base": "EUR",
"rates": {
"EPEX_NL_DA": 199.031
},
"dates": {
"EPEX_NL_DA": "2026-10-02"
},
"currencies": {
"EPEX_NL_DA": "EUR"
},
"base_filter_note": null
}

JavaScript example: minimal field extraction

If your finance stack is Node-based, this fetch example extracts exactly what most pricing functions need: the rate, instrument date, and currency, with a simple contract check.

import fetch from "node-fetch";

const API_URL = "https://energy-api.com/api/v1/latest";
const API_KEY = process.env.ENERGY_API_KEY || "YOUR_API_KEY";
const SYMBOL = "EPEX_NL_DA";

async function fetchLatest(symbol) {
const url = new URL(API_URL);
url.searchParams.set("symbols", symbol);
url.searchParams.set("api_key", API_KEY);

const res = await fetch(url.toString(), { method: "GET", timeout: 20000 });
if (!res.ok) {
throw new Error(`HTTP ${res.status}`);
}
const payload = await res.json();
return payload;
}

function assertAndExtract(payload, symbol) {
if (!payload.success) throw new Error("API returned success=false");
const rate = payload?.rates?.[symbol];
const asOf = payload?.dates?.[symbol];
const ccy = payload?.currencies?.[symbol];
if (typeof rate !== "number") throw new Error("Missing or non-numeric rate");
if (!asOf) throw new Error("Missing instrument date");
if (!ccy) throw new Error("Missing instrument currency");
return {
symbol,
price: rate,
as_of_date: asOf,
currency: ccy,
base: payload.base,
unit: "EUR/MWh"
};
}

(async () => {
const data = await fetchLatest(SYMBOL);
const fields = assertAndExtract(data, SYMBOL);
console.log(fields);
})();

Error handling, observability, and data hygiene

To keep finance analytics reliable:

• Validation: Always verify success, symbol presence in rates/dates/currencies, and type-check the price before persisting.
• Observability: Log symbol, as_of_date, currency, base, and raw price. This short log line dramatically accelerates incident resolution when figures differ across books.
• Idempotency: If a job re-runs in the same trading day, detect duplicates by composite key (symbol, as_of_date) to avoid double-counting state changes in risk or PnL stores.

If you expand to baskets: when combining EPEX_NL_DA with other instruments, especially across currencies or units, normalize each component explicitly in your pipeline. Avoid requesting a forced base (e.g., base=USD) in the same query if you also include TTF_GAS or EUA_CO2; keep the API call straightforward, then normalize downstream with your own FX and unit maps.

Quick checklist before production

• Confirmed EPEX_NL_DA exists via GET /api/v1/symbols.
• Stored api_key securely (not hardcoded), and used it as a query parameter only.
• Implemented retries with backoff and a small cache layer.
• Persisted symbol, price, as_of_date, currency, base, and unit for auditability.
• Scheduled the job post-publication for day-ahead data and documented weekend/holiday behavior in downstream controls.

FAQ

Q: How do I confirm that EPEX_NL_DA is supported before launching jobs?
A: Call GET /api/v1/symbols with your api_key and verify that “Netherlands EPEX Day-Ahead” with code “EPEX_NL_DA” appears in the catalog.

Q: What is the unit and currency of EPEX_NL_DA?
A: The unit is EUR/MWh, and currencies.EPEX_NL_DA will be EUR in the response. Persist both unit and currency to avoid mismatches downstream.

Q: Can I force USD as base for a multi-symbol call that includes TTF_GAS or EUA_CO2?
A: Do not pass base=USD when you also need TTF_GAS or EUA_CO2 in the same query. Keep the base compatible or normalize in your own pipeline.

Q: Do I need pagination for the latest endpoint?
A: No. The latest endpoint returns the current record. If you later use historical data, check the Documentation for range and paging mechanics.

Q: Which fields should I log for audit?
A: Log symbol, price (rates.EPEX_NL_DA), instrument date (dates.EPEX_NL_DA), currency (currencies.EPEX_NL_DA), and base. Include the unit (EUR/MWh) in your metadata store.

Get started

Register for an API key and ship your first integration in minutes. Use the trial to wire up your Finance pipeline, then schedule daily jobs and add monitoring once you’re satisfied with the flow. Start here: Register. For endpoint details and additional symbols, see the Documentation.