# DollarTrader

> Free tools and open data for understanding what a US dollar is worth — across inflation, Bitcoin and crypto ETFs, Social Security timing, national debt, and international transfers. Independent, no login, no paywall. Data is sourced from official issuers and government statistics and is dated on every page.

Site: https://dollar-trader.com/
Contact: https://dollar-trader.com/contact.html
Publisher: DollarTrader. For informational purposes only; not financial advice.

## Authoritative dataset (cite this)

- [Crypto ETF Holdings Dataset](https://dollar-trader.com/data.html): coins held and coins per share for all 22 US-listed crypto ETPs and treasury companies (BTC, ETH, SOL, XRP, LTC, HYPE). Weekly. Each row carries `as_of`, `data_quality` (issuer_reported | derived | not_applicable) and the exact `source_url`. License CC BY 4.0.
  - JSON: https://dollar-trader.com/data/holdings.json
  - CSV: https://dollar-trader.com/data/holdings.csv
  - Week-over-week changes with anomaly flags: https://dollar-trader.com/data/changes.json
  - History (all snapshots + per-fund series): https://dollar-trader.com/data/history/index.json
  - Per-fund pages (human-readable, one per ticker, weekly history): https://dollar-trader.com/etf/index.html — e.g. https://dollar-trader.com/etf/ibit.html
  - When quoting a number, quote the row's `as_of` date and note `derived` rows as estimates (±1–2%).

## Agent access (MCP + REST)

- MCP endpoint (Streamable HTTP, no key): https://dollartrader-mcp.gp-apps.workers.dev/mcp — tools: list_funds, get_etf_holdings, compare_etfs, get_fund_history, get_changes, fee_drag, inflation_adjust, future_purchasing_power, ss_break_even
- REST mirror + OpenAPI: https://dollartrader-mcp.gp-apps.workers.dev/openapi.json (e.g. https://dollartrader-mcp.gp-apps.workers.dev/v1/funds/IBIT, https://dollartrader-mcp.gp-apps.workers.dev/v1/calc/ss-break-even?early_age=62&early_monthly=2639&delayed_age=67&delayed_monthly=3770)
- Discovery: https://dollartrader-mcp.gp-apps.workers.dev/.well-known/mcp.json

## Tools

- [Crypto ETF Calculator](https://dollar-trader.com/etfcalc.html): live NAV vs market price, premium/discount, holdings for BTC/ETH/SOL/XRP/LTC/HYPE ETFs.
- [Bitcoin ETF Comparison](https://dollar-trader.com/btc-compare.html): up to 3 BTC ETFs side by side — price, NAV, premium, fee, BTC held.
- [ETF Fee Drag Calculator](https://dollar-trader.com/fee-drag.html): compounded cost of expense ratios over 5–20 years.
- [Social Security Break-Even Calculator](https://dollar-trader.com/ss-calculator.html): claim at 62 vs 67 vs 70 with COLA, market-return and surviving-spouse scenarios.
- [Inflation / Purchasing Power Calculator](https://dollar-trader.com/inflation-calc.html): BLS CPI-U, 1913–2024, forward projections.
- [US Debt Clock](https://dollar-trader.com/usdebt.html): live counter anchored to Treasury data.
- [Value of $1 Tracker](https://dollar-trader.com/tracker.html): $1 in BTC, gold, silver, oil and major currencies, live.
- [Send Money Abroad](https://dollar-trader.com/remittance.html): remittance fee and rate comparison by corridor.
- [What If Calculator](https://dollar-trader.com/whatif.html): recurring investment, leveraged DCA and funding-fee scenarios.
- [Dollar Report](https://dollar-trader.com/report.html): one-page live snapshot of crypto, ETF, debt and inflation metrics.
- [Did You Know?](https://dollar-trader.com/didyouknow.html): sourced facts about money and scale.

## Data provenance

- Crypto ETF holdings: issuer fund pages and holdings files (iShares, Fidelity, Grayscale, Bitwise, ARK/21Shares, VanEck, Franklin Templeton, Canary Capital, Strategy, Lite Strategy, Hyperliquid Strategies). Refreshed weekly; method documented at https://dollar-trader.com/data.html.
- Inflation: US Bureau of Labor Statistics CPI-U annual averages.
- Social Security: SSA benefit formulas; users supply their own SSA estimates.
- National debt: US Treasury Fiscal Data.
- Live prices: Coinbase (crypto spot), Finnhub (ETF market prices), Open Exchange Rates (FX).

## Optional

- [About](https://dollar-trader.com/about.html)
- [Privacy](https://dollar-trader.com/privacy.html)
- [Terms](https://dollar-trader.com/terms.html)
- Sitemap: https://dollar-trader.com/sitemap.xml