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US Spot Bitcoin & Ethereum ETF Flows

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Daily net flows for US spot Bitcoin & Ethereum ETFs (IBIT, FBTC, GBTC, ETHA) with per-fund history

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http us-spot-bitcoin-ethereum-etf-flows 'https://yasinozen.com/etf-flows/mcp' --header 'X-API-Key: <Optional free or Pro API key from https://yasinozen.com/etf-flows/get-api-key/>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "us-spot-bitcoin-ethereum-etf-flows": {
            "type": "http",
            "url": "https://yasinozen.com/etf-flows/mcp",
            "headers": {
                "X-API-Key": "<Optional free or Pro API key from https://yasinozen.com/etf-flows/get-api-key/>"
            }
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. ETF Flows MCP Server — Spot Bitcoin & Ethereum ETF Flows for AI Assistants
  2. Quick start: remote server (recommended)
  3. Tools
  4. Run locally (stdio)
  5. Plans
  6. Data

ETF Flows MCP Server — Spot Bitcoin & Ethereum ETF Flows for AI Assistants

Give Claude, ChatGPT, Cursor, VS Code or any MCP client daily net flows for every US spot Bitcoin and Ethereum ETF — IBIT, FBTC, GBTC, ARKB, ETHA, FETH, ETHE and more.

Claude → Settings → Connectors → Add custom connector → https://yasinozen.com/etf-flows/mcp

Claude Code

claude mcp add --transport http etf-flows https://yasinozen.com/etf-flows/mcp

Cursor / Windsurf / VS Code (mcp.json)

{
  "mcpServers": {
    "etf-flows": {
      "url": "https://yasinozen.com/etf-flows/mcp",
      "headers": { "X-API-Key": "YOUR_KEY" }
    }
  }
}

The key is optional. Clients that cannot send headers can use https://yasinozen.com/etf-flows/mcp?api_key=YOUR_KEY. One-click install links for Cursor and VS Code are on the setup page.

Tools

ToolDescription
get_etf_flow_summaryLatest day, 7/30-day, month-to-date, YTD and cumulative flows, streaks and top funds (remote server)
get_latest_etf_flowsDaily totals for the most recent trading days, optional per-fund breakdown
get_etf_flows_by_date_range / query_etf_flows_by_date_rangeDaily totals between two dates
get_fund_flowsDaily flows and cumulative total for one ETF (e.g. IBIT)
get_pro_access_infoPlans and how to get a key

Example prompts: “Summarize spot Bitcoin ETF flows this week”, “Did IBIT have outflows in the last 10 days?”, “Compare Ethereum ETF flows in August and September.”

Run locally (stdio)

Requires uv.

{
  "mcpServers": {
    "etf-flows": {
      "command": "uv",
      "args": ["--directory", "/absolute/path/to/free-etf-flows-mcp", "run", "python", "mcp_server.py"],
      "env": { "ETF_FLOWS_API_KEY": "YOUR_KEY" }
    }
  }
}

Plans

Preview (no key)Free keyPro ($9.99/mo)
History7 trading days90 trading daysFull, since Jan 2024
Delay1 day1 daySame day
Per-fund data–✓✓
CSV export––✓
Rate limit10/min30/min120/min

👉 Get a free key · Upgrade to Pro

Data

Daily figures are sourced from the public ETF flow tables of Farside Investors and normalized to US dollars (parenthesized values become negative). See the methodology. This project is independent and not affiliated with Farside Investors or any ETF issuer. Not investment advice.

Built by Yasin Özen ·

Frequently asked questions

What is US Spot Bitcoin & Ethereum ETF Flows?

Daily net flows for US spot Bitcoin & Ethereum ETFs (IBIT, FBTC, GBTC, ETHA) with per-fund history

How do I install US Spot Bitcoin & Ethereum ETF Flows?

It runs as a remote server. In Claude Code: claude mcp add --transport http us-spot-bitcoin-ethereum-etf-flows 'https://yasinozen.com/etf-flows/mcp' --header 'X-API-Key: <Optional free or Pro API key from https://yasinozen.com/etf-flows/get-api-key/>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does US Spot Bitcoin & Ethereum ETF Flows need an API key?

Yes. It expects X-API-Key, which you set in its configuration.

Is US Spot Bitcoin & Ethereum ETF Flows open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains US Spot Bitcoin & Ethereum ETF Flows?

It is published by yasinozen35. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.