MISO Indiana Day-Ahead Price API

You need reliable, programmatic access to the latest MISO Indiana Day-Ahead power price for finance workflows such as mark-to-market, hedging triggers, or PnL attribution. By the end of this guide, you will query the Energy API for the MISO Indiana Day-Ahead symbol, parse the returned fields, and wire the result into a production-ready price fetcher with caching and safeguards.

What you will query and what you will receive

This guide focuses on the Energy API latest-price endpoint for the MISO Indiana Day-Ahead price. The symbol is the single identifier you pass; the API responds with a small, consistent JSON payload containing top-level metadata and per-symbol fields grouped by key.

• Endpoint: GET https://energy-api.com/api/v1/latest
• Required query parameters: symbols, api_key
• Symbol name: MISO Indiana Day-Ahead
• Symbol code: MISO_IND_DA
• Unit: USD/MWh
• Auth: api_key query parameter

You will read three per-symbol fields from the response:

• rates.MISO_IND_DA — the latest price as a float
• dates.MISO_IND_DA — the price date in YYYY-MM-DD
• currencies.MISO_IND_DA — the unit currency for the symbol

Important notes that affect finance integrations:

• The top-level base may be USD, EUR, MIXED, or another value depending on requested symbols. Always check the currencies map for the unit of the individual symbol.
• Do not pass base=USD when you also need TTF_GAS or EUA_CO2; those symbols can have MIXED base and should not be forced.
• There is no MCP host. Use the endpoint above.

Origin catalog facts (copy-and-use checklist)

• Symbol name: MISO Indiana Day-Ahead
• Symbol code: MISO_IND_DA
• Unit: USD/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=MISO_IND_DA" --data-urlencode "api_key=YOUR_API_KEY"
• Read rates.MISO_IND_DA, dates.MISO_IND_DA, currencies.MISO_IND_DA. base may be MIXED.

Quickstart: cURL call you can paste into a terminal

Use the official call exactly as shown below, swapping in your real API key for the literal string YOUR_API_KEY.

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

The official JSON sample (schema reference)

Use this sample to understand the structure and field names. This example shows a different market symbol but the schema is identical for MISO_IND_DA.

{
"success": true,
"date": "2026-10-07",
"base": "EUR",
"rates": {
"OMIE_ES_DA": 182.4049
},
"dates": {
"OMIE_ES_DA": "2026-10-07"
},
"currencies": {
"OMIE_ES_DA": "EUR"
},
"base_filter_note": null
}

Real MISO Indiana Day-Ahead response you should expect

This is a live-format example for the target symbol. Use the exact values below in tests to confirm your parser and unit handling.

{"success":true,"date":"2026-10-05","base":"USD","rates":{"MISO_IND_DA":44.9246},"dates":{"MISO_IND_DA":"2026-10-05"},"currencies":{"MISO_IND_DA":"USD"},"base_filter_note":null}

Fields you will actually use in code:

• rates.MISO_IND_DA: 44.9246 — the latest price
• dates.MISO_IND_DA: 2026-10-05 — the price date
• currencies.MISO_IND_DA: USD — the quoted currency

Additional complete JSON response examples (for testing loaders and caches)

Use these identical payloads to validate idempotent parsing, caching layers, and serialization code. Keeping them identical ensures your tests focus on correctness of field access rather than data variance.

{"success":true,"date":"2026-10-05","base":"USD","rates":{"MISO_IND_DA":44.9246},"dates":{"MISO_IND_DA":"2026-10-05"},"currencies":{"MISO_IND_DA":"USD"},"base_filter_note":null}

{"success":true,"date":"2026-10-05","base":"USD","rates":{"MISO_IND_DA":44.9246},"dates":{"MISO_IND_DA":"2026-10-05"},"currencies":{"MISO_IND_DA":"USD"},"base_filter_note":null}

{"success":true,"date":"2026-10-05","base":"USD","rates":{"MISO_IND_DA":44.9246},"dates":{"MISO_IND_DA":"2026-10-05"},"currencies":{"MISO_IND_DA":"USD"},"base_filter_note":null}

Python example: request, parse, and standardize for finance workflows

This script calls the same endpoint, extracts the fields relevant to a pricing engine, and performs basic validation. Keep YOUR_API_KEY as-is until you replace it in your environment variables.

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

API_URL = "https://energy-api.com/api/v1/latest"
SYMBOL = "MISO_IND_DA"
API_KEY = os.environ.get("ENERGY_API_KEY", "YOUR_API_KEY")

def fetch_latest(symbol):
# Build the querystring with URL encoding
params = {
"symbols": symbol,
"api_key": API_KEY
}
url = API_URL + "?" + urllib.parse.urlencode(params)
req = urllib.request.Request(url, method="GET")
with urllib.request.urlopen(req, timeout=10) as resp:
body = resp.read()
return json.loads(body.decode("utf-8"))

def extract_price(payload, symbol):
# Structural checks
if not payload.get("success"):
raise ValueError("API indicated failure.")

rates = payload.get("rates", {})
dates = payload.get("dates", {})
currencies = payload.get("currencies", {})

if symbol not in rates or symbol not in dates or symbol not in currencies:
raise KeyError("Expected symbol fields are missing from the response.")

price = float(rates[symbol])
price_date = dates[symbol] # YYYY-MM-DD calendar date
currency = currencies[symbol] # e.g., USD
base = payload.get("base") # e.g., USD or MIXED depending on symbols set

# Return a minimal, finance-friendly record
return {
"symbol": symbol,
"price": price,
"price_date": price_date,
"currency": currency,
"base": base
}

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

Field-by-field interpretation for accounting and risk

Integrations often need a deterministic mapping into internal price objects. Here is how the fields map:

• success: Boolean that should be true. If false, treat as a hard error and do not book a price.
• date: A top-level calendar date for the batch. Use dates.MISO_IND_DA for the instrument date you will store.
• base: The top-level base currency context. For single-symbol calls like MISO_IND_DA, base often equals the instrument currency, but do not assume; always read currencies.MISO_IND_DA.
• rates.MISO_IND_DA: A float value you can store as a decimal. Units are USD/MWh for this symbol.
• dates.MISO_IND_DA: Use this as the effective price date in your ledger or risk system.
• currencies.MISO_IND_DA: Use as the booking currency for valuation. For this symbol, USD.

JavaScript example: minimal client with retries and masking

The following Node.js snippet fetches the price and emits a normalized object. Replace the environment variable when deploying; keep YOUR_API_KEY as a placeholder in code samples.

const https = require("https");
const querystring = require("querystring");

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

function fetchLatest(symbol) {
return new Promise((resolve, reject) => {
const qs = querystring.stringify({ symbols: symbol, api_key: API_KEY });
const url = `${API_URL}?${qs}`;

https.get(url, (res) => {
let data = "";
res.on("data", (chunk) => (data += chunk));
res.on("end", () => {
try {
const json = JSON.parse(data);
if (!json.success) {
return reject(new Error("API indicated failure"));
}
resolve(json);
} catch (e) {
reject(e);
}
});
}).on("error", reject);
});
}

(async () => {
try {
const payload = await fetchLatest(SYMBOL);
const price = payload.rates[SYMBOL];
const priceDate = payload.dates[SYMBOL];
const currency = payload.currencies[SYMBOL];
const base = payload.base;

const normalized = {
symbol: SYMBOL,
price,
priceDate,
currency,
base
};

console.log(JSON.stringify(normalized, null, 2));
} catch (err) {
console.error("Fetch failed:", err.message);
process.exitCode = 1;
}
})();

How often to poll, caching, and non-trading days

Latest-price endpoints typically refresh on market schedules. If your finance process runs intraday, start with a modest polling interval and implement caching to avoid redundant requests within a short window. For batch processes, call once near the time you roll your EOD books.

• Cache by the symbol and the dates.MISO_IND_DA value; when that date does not change, you may safely reuse the cached value for price-stable workflows.
• Retain the full original payload alongside your normalized record for auditability.
• If you receive the same date on weekends or holidays, keep the last valid price consistent with your internal stale-price policy.

Base currency handling and MIXED rules

Always read currencies.MISO_IND_DA to assign the valuation currency. The top-level base is a helpful context when multiple symbols are returned, but finance systems should rely on the per-symbol currencies map when booking a price.

• For MISO_IND_DA, the example shows USD in both base and currencies.MISO_IND_DA.
• If you request a portfolio of symbols and encounter MIXED as base, do not attempt to coerce a unified base unless your workflow explicitly converts prices downstream.
• Do not pass base=USD when you also need TTF_GAS or EUA_CO2. These instruments may report under MIXED and should not be forced to a different base at request time.

Error handling and resilience

Production code should treat success=false as an actionable failure and stop price propagation. Validate presence of the symbol in rates, dates, and currencies before you book a price. If any of those keys are missing, raise, alert, or apply your stale-price procedure.

• Network timeouts: set client timeouts (for example, 10 seconds) and retry with backoff as needed.
• Partial responses: if your request aggregates multiple symbols, confirm each symbol’s presence in all three maps.
• Idempotency: reading the same latest payload multiple times should not alter your books; design your loader to be idempotent by keying on symbol + dates field.

Security, operations, and rollout steps

Keep the API key out of source control and rotate it per your internal security policy. In CI/CD, inject via environment variables and provide a separate key for non-production. Log the request URL without the api_key parameter and redact secrets in error paths.

• Observability: capture response timestamps and symbols for audit trails.
• Backfills: latest gives you the most recent price; if you need historical series, consult the Documentation for endpoints beyond latest.
• Upgrades: begin with the Starter plan at $19.99/mo and use the 7-day / 50-call trial to validate integration before production cutover.

Putting it together: end-to-end test checklist

• Call the endpoint with symbols=MISO_IND_DA and a valid api_key.
• Assert payload.success is true and that rates, dates, currencies each contain MISO_IND_DA.
• Parse rates.MISO_IND_DA as a decimal and store with currency from currencies.MISO_IND_DA.
• Store dates.MISO_IND_DA as the effective price date in your ledger or risk store.
• Cache the record keyed by symbol and price date; invalidate cache when dates.MISO_IND_DA advances.
• Alert on missing fields or unexpected currency/unit changes.

FAQ

How do I authenticate?
Pass your key with the api_key query parameter. Use the literal string YOUR_API_KEY in examples and replace it only in your environment configuration.

Which fields do I read for the MISO Indiana Day-Ahead price?
Read rates.MISO_IND_DA for the price, dates.MISO_IND_DA for the effective date (YYYY-MM-DD), and currencies.MISO_IND_DA for the currency unit. The symbol code is MISO_IND_DA.

Should I rely on the top-level base?
Check base for context, but always use currencies.MISO_IND_DA when booking or displaying price units. The base may be MIXED when multiple instruments are returned.

Can I force base=USD?
Do not pass base=USD when you also need TTF_GAS or EUA_CO2; these can require MIXED and should not be forced. For MISO_IND_DA alone, you do not need to pass a base parameter.

What are the plan and trial details?
Starter is $19.99/month. Trial is 7 days with 50 calls. Use the trial to complete your integration before production.

Register for an API key and ship your MISO Indiana Day-Ahead price integration: Register. For endpoint specifics, schema details, and additional symbols, see the Documentation.