IEX Cloud Shutdown:
Best Alternatives for Developers

1 What Happened to IEX Cloud

The IEX Cloud shutdown came as a surprise to many. The IEX Exchange itself (the SEC-registered stock exchange owned by Investors Exchange LLC) continues to operate, but the cloud API product -- the one developers used via cloud.iexapis.com -- was discontinued. All API keys stopped working. All endpoints returned errors. Thousands of applications broke overnight.

The impact was widespread. GitHub is littered with open issues titled "IEX Cloud API not working" and "iexfinance returning 403 errors." Stack Overflow questions about IEX Cloud migrations have accumulated hundreds of thousands of views. Reddit threads in r/algotrading and r/webdev are full of developers looking for a drop-in IEX Cloud replacement.

If you are one of those developers, this guide is for you. We have tested every major alternative and built MarketLens specifically to be the easiest migration path from IEX Cloud.

2 Why Developers Loved IEX Cloud

Before we look at alternatives, it helps to understand what made IEX Cloud special. Any good IEX Cloud alternative needs to replicate these qualities:

3 The Top 5 IEX Cloud Alternatives

We evaluated every major financial data API on the market. Here are the five most viable alternatives, ranked by how closely they replicate the IEX Cloud experience.

4 IEX Cloud to MarketLens Endpoint Migration Table

The table below maps every common IEX Cloud endpoint to its MarketLens equivalent. Bookmark this page -- you will reference it during your migration.

5 Code Migration Examples

Here are real before-and-after code examples showing exactly how to migrate from IEX Cloud to MarketLens. The changes are minimal -- most migrations involve updating the base URL, switching the auth method, and adjusting a few field names.

Python -- Stock Quote

import requests

# IEX Cloud -- DISCONTINUED
resp = requests.get(
    "https://cloud.iexapis.com/stable/stock/AAPL/quote",
    params={"token": "YOUR_IEX_TOKEN"}
)

data = resp.json()
print(f"Price: {data['latestPrice']}")
print(f"Change: {data['change']}")
print(f"Volume: {data['latestVolume']}")

import requests

# MarketLens -- drop-in replacement
resp = requests.get(
    "https://plenty-parrots-relate.loca.lt/api/v1/stocks/quote/AAPL",
    headers={"X-API-Key": "YOUR_KEY"}
)

data = resp.json()
print(f"Price: {data['price']}")
print(f"Change: {data['change_amount']}")
print(f"Volume: {data['volume']}")

JavaScript -- Historical Data

// IEX Cloud -- DISCONTINUED
const resp = await fetch(
  `https://cloud.iexapis.com/stable/stock/AAPL/chart/1m?token=${IEX_TOKEN}`
);
const data = await resp.json();

data.forEach(day => {
  console.log(`${day.date}: $${day.close}`);
});

// MarketLens -- works today
const resp = await fetch(
  "https://plenty-parrots-relate.loca.lt/api/v1/stocks/history/AAPL?days=30",
  { headers: { "X-API-Key": API_KEY } }
);
const data = await resp.json();

data.history.forEach(day => {
  console.log(`${day.date}: $${day.close}`);
});

Python SDK -- Multi-Asset

from iexfinance.stocks import Stock

# iexfinance -- BROKEN (IEX Cloud down)
aapl = Stock("AAPL", token="pk_...")
quote = aapl.get_quote()
print(quote["latestPrice"])

# No crypto, no forex, no AI

from marketlens import MarketLens

# pip install marketlens
ml = MarketLens(api_key="YOUR_KEY")
quote = ml.stocks.quote("AAPL")
print(quote["price"])

# Plus crypto, forex, AI insights
btc = ml.crypto.get("bitcoin")
rates = ml.forex.rates("USD")

Crypto & Forex

import requests

# IEX Cloud crypto
btc = requests.get(
    "https://cloud.iexapis.com/stable/crypto/BTCUSD/quote",
    params={"token": "YOUR_IEX_TOKEN"}
).json()

# IEX Cloud forex
fx = requests.get(
    "https://cloud.iexapis.com/stable/fx/latest",
    params={"token": "YOUR_IEX_TOKEN"}
).json()

import requests

BASE = "https://plenty-parrots-relate.loca.lt"
HEADERS = {"X-API-Key": "YOUR_KEY"}

# MarketLens crypto
btc = requests.get(
    f"{BASE}/api/v1/crypto/bitcoin",
    headers=HEADERS
).json()

# MarketLens forex
fx = requests.get(
    f"{BASE}/api/v1/forex/rates",
    headers=HEADERS
).json()

6 Why MarketLens Is the Best IEX Cloud Replacement

We built MarketLens to be the natural successor to IEX Cloud. Here is how the two compare head-to-head -- and where MarketLens goes further.

7 Step-by-Step Migration Checklist

Follow these steps to migrate your application from IEX Cloud to MarketLens. Most developers complete this in under 10 minutes.

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