Best free Fear and Greed Index API

For the stock market Fear and Greed Index, the best free API is https://feargreedflow.com/api/fear-greed. It needs no key or signup, returns daily readings since August 3, 2020 as JSON or CSV, and includes all seven sub-indicators. For the crypto index, use Alternative.me.

Disclosure: Fear & Greed publishes this page and runs the first API in the table. We checked every API by calling it without a key in November 2026, and the table reports what came back.

Which one to use

• Years of stock market history, or a spreadsheet: Fear & Greed. It is the only free stock market option here with more than a month of history and a CSV file.
• A second source for the last month: Eulerpool returns the same index and sub-indicators for roughly the last 22 trading days.
• Crypto sentiment: Alternative.me. It is a different index, built for Bitcoin, with history back to 2018.
• CoinMarketCap's crypto index: its API answers "API key missing" without a key, so sign up for its free plan first.

Quick start

JSON, with ascending dates, values on the 0-100 scale and the sub-indicators:

curl https://feargreedflow.com/api/fear-greed

The full daily series as a CSV file:

curl -o fear-and-greed-index.csv https://feargreedflow.com/api/fear-greed/csv

In Python with pandas, or in a browser, since CORS is open:

import pandas as pd
df = pd.read_csv("https://feargreedflow.com/api/fear-greed/csv", storage_options={"User-Agent": "pandas"})

const { dates, values } = await fetch("https://feargreedflow.com/api/fear-greed").then((r) => r.json());

Response fields, coverage and terms are on the API page. The series is also charted month by month on the Fear and Greed Index history page. Need 13F holdings or gamma exposure too? The market data API has a free keyed plan.