How do I get an API key?

Sign up on cryptoetf.today and open your profile. A REST API key is created automatically. Pass it on every request as the header Authorization: Bearer YOUR_API_KEY.

Which assets and data are covered?

Spot ETF net flows for Bitcoin (BTC), Ethereum (ETH), Solana (SOL), XRP and Hyperliquid (HYP), plus the CEFI sentiment index, current prices, a ticker directory and weekly analytics.

How often is the data updated?

Flow data is parsed daily from primary sources, typically within 24 hours of market close. Prices refresh continuously.

What are the rate limits?

Requests are limited per API key and reported via X-RateLimit-* response headers; exceeding the limit returns HTTP 429. The free tier returns the most recent 30 days of history.

Can I use the data with AI tools or an MCP server?

Yes. Generate a dedicated MCP key in your profile and plug it into an MCP-compatible client (Claude, Cursor, etc.) to query crypto ETF flows directly inside your tools.

Is this financial advice?

No. The API provides data and metrics for informational purposes only and does not constitute investment, financial or trading advice.

FREE · API-KEY AUTHENTICATED · NO CARD

Free Crypto ETF API

Real-time spot crypto ETF flows for Bitcoin, Ethereum, Solana, XRP and Hyperliquid — plus the CEFI sentiment index, live prices and weekly analytics. One clean REST API, free with an API key.

Get your free API key Read the API docs →

5 tracked assetsDaily updatesREST + OpenAPI + MCP

# Get Bitcoin spot ETF daily net flows
curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://api.cryptoetf.today/api/v1/flows/btc

base: https://api.cryptoetf.today/api/v1

What the crypto ETF API gives you

Everything you need to build dashboards, alerts, bots and research tools around spot crypto ETF activity.

📈

ETF Flows

Daily net inflows and outflows for every spot crypto ETF, with per-asset history.

🧭

CEFI Sentiment Index

Our composite Crypto ETF Flow Sentiment index for BTC, ETH, SOL, XRP and combined flows.

💵

Live Prices

Current spot prices for all tracked assets, refreshed continuously.

🗂️

Ticker Directory

Clean directory of tracked assets and symbols to bootstrap your integration.

📊

Weekly Analytics

Pre-aggregated 7-day flow analytics — totals, averages, positive vs negative days.

⚡

Daily Updates

Data parsed daily from primary sources and served as clean, predictable JSON.

API endpoints

Base URL https://api.cryptoetf.today/api/v1. Assets: btc, eth, sol, xrp, hyp.

GET/flows/summaryLatest-day net ETF flow (USD millions) for every asset

GET/flows/{asset}Daily net inflow / outflow history for one asset

GET/index/cefiComposite Crypto ETF Flow Sentiment index (CEFI) + history

GET/index/cefi/{asset}CEFI sentiment index for a single asset

GET/tickersDirectory of tracked assets and symbols

GET/pricesCurrent spot prices of tracked assets

GET/analytics/weekly7-day aggregated flow analytics per asset

Full reference & try it →

Why use the CryptoETF API

Free to start

Developer-first

Predictable REST endpoints, stable JSON schemas, and a live OpenAPI spec you can generate clients from.

All assets in one place

Bitcoin, Ethereum, Solana, XRP and Hyperliquid spot ETF flows from a single, consistent API.

AI & MCP ready

An llms.txt manifest plus an MCP key so AI tools like Claude and Cursor can query the data directly.

Crypto ETF API — FAQ

Yes. The public API is free to use — just register on cryptoetf.today to receive an API key. We rate-limit per key to keep the service healthy; if you need higher limits or full historical data, contact us.

Explore the data

See the same crypto ETF flow data powering the API across our live trackers.

Bitcoin ETF flows Ethereum ETF flows Solana ETF flows XRP ETF flows Hyperliquid ETF flows CEFI sentiment index

Need more than the free tier?

Full historical data, higher rate limits, extended analytics or a managed MCP integration — tell us what you're building and we'll set you up.

Get your free API key Contact us