How do I authenticate?

Send your key as a Bearer token: Authorization: Bearer YOUR_API_KEY. Keys are managed from your account profile.

How often is the data updated?

ETF flow data is ingested within 30 seconds of issuer publication each trading day, and spot prices refresh continuously.

Which assets are covered?

All US-listed spot crypto ETFs for Bitcoin, Ethereum, Solana, XRP and Hyperliquid, plus the CEFI sentiment index.

Are there rate limits?

The free tier has generous limits suitable for dashboards and research. Higher-volume access is available on request.

Is there an OpenAPI spec or MCP server?

Yes — the API ships with an OpenAPI specification and an MCP server, so you can query the data from AI tools like Claude.

Is this investment advice?

No. The API provides data for informational and research purposes only and is not investment advice.

FREE · API-KEY AUTHENTICATED · NO CARD

CryptoETF Data API for developers and analysts

Access comprehensive ETF flows, fund holdings, indices, and historical data. Built for dashboards, alerts, and research.

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 US-listed spot Bitcoin, Ethereum, Solana, XRP and Hyperliquid ETF, down to the fund level.

🧭

CEFI sentiment index

The 0–100 institutional sentiment index — composite and per-asset — from a single endpoint.

💵

Live prices

Real-time spot prices for BTC, ETH, SOL, XRP and HYPE, refreshed throughout the trading day.

🗂️

Ticker directory

Every tracked ETF ticker with its issuer, fees, AUM and latest price in one call.

📊

Weekly analytics

Pre-computed weekly flow and AUM summaries, ready for reports and dashboards.

⚡

Daily updates

Fresh data ingested within 30 seconds of issuer publication, every trading day.

API endpoints

Every endpoint is a simple authenticated GET against https://api.cryptoetf.today/api/v1. Asset paths accept btc, eth, sol, xrp or hyp.

GET/flows/summaryAggregated net flows across all tracked assets.

GET/flows/{asset}Daily flow history for a single asset (btc, eth, sol, xrp, hyp).

GET/index/cefiComposite CEFI sentiment index.

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

GET/tickersAll tracked ETF tickers with prices and metadata.

GET/pricesCurrent spot prices for every tracked asset.

GET/analytics/weeklyWeekly flow and AUM analytics.

Full reference & try it →

MCP · AI ASSISTANTS

Query ETF data from your AI assistant

The CryptoETF MCP server gives Claude, Cursor and other AI tools direct access to live ETF flow data — ask in plain language, get real numbers.

Connect in one command

claude mcp add --transport http cryptoetf https://mcp.cryptoetf.today/api/mcp

Use --scope project to add to your repo's .mcp.json, or --scope user for all projects.

MCP endpoint: https://mcp.cryptoetf.today/api/mcp

5 available tools

get_flows_summaryLatest net ETF flows for all 5 assets (BTC, ETH, SOL, XRP, HYP)

get_asset_flows30-day daily flow history for one asset

get_cefi_indexComposite CEFI sentiment score (baseline 100)

get_pricesCurrent spot prices + 24h change for all tracked assets

get_weekly_analytics7-day aggregated flow analytics per asset

Example questions you can ask

“What were Bitcoin ETF flows today?”

“Which crypto asset had the most inflows this week?”

“What is the current CEFI sentiment index?”

“Compare ETF flows between BTC and ETH”

Why use the CryptoETF API

Free to start

Generate an API key in seconds — no credit card, no sales call.

Developer-first

Clean REST/JSON, predictable schemas, an OpenAPI spec and an MCP server.

5 assets, one API

Bitcoin, Ethereum, Solana, XRP and Hyperliquid spot ETFs through one consistent interface.

AI-ready

Connect the MCP server to Claude or Cursor and query crypto ETF data in plain language.

Crypto ETF API — FAQ

Yes. The core API is free with an API key — no credit card required. Generate one in your profile and start calling right away.

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