CryptoETF Data API for developers and analysts
Access comprehensive ETF flows, fund holdings, indices, and historical data. Built for dashboards, alerts, and research.
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 crypto ETF across 13 assets — Bitcoin, Ethereum, Solana, XRP, Hyperliquid, Dogecoin, Chainlink, Avalanche, Hedera, Litecoin, BNB, Polkadot and Sui — down to the fund level.
CEFI sentiment index
The 0–100 institutional sentiment index — a single market-wide composite across all 13 tracked assets — from one endpoint.
Live prices
Real-time spot prices and 24-hour change for all 13 tracked assets, refreshed throughout the trading day.
Asset directory
Every tracked asset with its ticker, internal id and name — the exact values other endpoints accept as the asset path parameter.
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 any of the 13 tracked assets:
btcethsolxrphypdogelinkavaxhbarltcbnbdotsuiFull names work too — bitcoin, dogecoin, chainlink, avalanche, hedera, litecoin, polkadot. Anything else returns 400.
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
- 1Choose your client below and copy the snippet.
- 2Run the command, or paste the JSON into the client's MCP config file — then restart the app if it asks.
- 3Ask a question in plain language: the assistant calls the tools and reads the live numbers itself.
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
Example questions you can ask
Package, source and registry
@zerosix-studio/cryptoetf-mcpThe stdio bridge on npm — zero dependencies, published with build provenance.Source on GitHubzerosix-studio/cryptoetf-mcpRead the code that npx runs on your machine, open an issue or a pull request.MCP Registryio.github.sly13/cryptoetfThe server in the official Model Context Protocol registry.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.
13 assets, one API
Bitcoin, Ethereum, Solana, XRP, Hyperliquid, Dogecoin, Chainlink, Avalanche, Hedera, Litecoin, BNB, Polkadot and Sui 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
Explore the data
See the same crypto ETF flow data powering the API across our live trackers.
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.