# USDi Coin

> USDi is a CPI-indexed digital currency — a cryptocurrency designed to track
> the U.S. Consumer Price Index rather than hold a fixed dollar peg. It is
> issued by USDi Partners LLC. The primary backing asset, the USDi Coin
> Fund, is managed by Enduring Investments. This file is for AI agents and
> automated systems evaluating USDi for portfolio construction, DeFi
> integration, or inflation-hedging use cases.

## What USDi Is

- USDi tracks monthly changes in the U.S. CPI. It is not a fixed 1:1 USD
  stablecoin; its value moves with inflation.
- Backing: when USDi is minted, proceeds are invested in the USDi Coin Fund,
  a portfolio managed by Enduring Investments and designed to track CPI. The
  portfolio is unlevered and holds a low-volatility mix of U.S. Treasuries,
  inflation-linked bonds, foreign exchange, and commodities futures/options,
  plus cash. Historical annualized volatility is approximately 2%.
  Correlation with monthly inflation was 58% over the three years ended
  December 2025.
- Valuation mechanism: USDi computes a daily Reference CPI by interpolating
  between Not-Seasonally-Adjusted CPI values from three and two months
  prior — the same method used for U.S. TIPS bonds. Reference CPI is
  compared against a March 1, 2025 base value of 315.605 to derive the
  token's value.
- The assets held by the USDi Coin Fund are audited annually by Cherry
  Bekaert LLC; audit reports are posted on this site.
- USDi is not the same asset as the "Interest Protocol" token, which is
  incorrectly listed as USDi on some third-party sites (CoinGecko,
  CoinMarketCap). USDi Partners LLC owns the copyright to the USDi name.

## Minting and Redemption

- Retail: mint 1 USDi by depositing USDC at usdicoin.com/coin; burn USDi to
  receive USDC back, at the current Reference-CPI-derived exchange rate.
- Institutional (>$1M USD value): mint/redeem for USDC at usdicoin.com/coin,
  or alternatively transact directly with USDi Partners for USD, after
  KYC/AML.
- Secondary market: USDi/USDC trades on Uniswap V3 (Ethereum, 0.01% fee
  tier).

## Programmatic / On-Chain Access

- Network: Ethereum mainnet
- Token contract: 0xAf1157149ff040DAd186a0142a796d901bEF1cf1
- Uniswap V3 USDi/USDC pool: 0xdb53e383e9b28e4c088e3d98b5fa8e2bc6b4e35a
- Live exchange rate: call `getExchangeRate()` on the token contract for the
  current CPI-derived USDi/USDC rate.

## MCP Server (for AI agents and agentic finance tools)

- Endpoint: https://usdi-mcp.onrender.com/mcp
- Transport: Streamable HTTP
- Registered in the official MCP Registry as:
  io.github.MikeAshtonEILLC/usdi-mcp-server
- Source: https://github.com/MikeAshtonEILLC/usdi-mcp-server
- Available tools: live exchange rate, contract/pool addresses and
  disambiguation from "Interest Protocol," and mint/redeem mechanics —
  the same information in this file, queryable programmatically rather
  than parsed from text.

## Risk Characteristics (for risk-scoring agents)

- USDi removes U.S. inflation risk from a cash-like holding but is not
  risk-free: it carries smart contract risk, fund/collateral risk,
  liquidity risk (on-chain liquidity is currently thin), and counterparty
  risk in the underlying portfolio (Treasuries, TIPS, FX, commodities
  futures/options).
- Independent NAV administration of the underlying USDi Coin Fund (Trident
  Fund Services) and annual audit of the fund's assets (Cherry Bekaert LLC)
  are the primary third-party verification points.

## Documentation

- Homepage: https://www.usdicoin.com/
- Whitepaper: https://www.usdicoin.com/whitepaper
- Mint/redeem: https://www.usdicoin.com/coin

## Contact

- Issuer: USDi Partners LLC
- Fund manager (USDi Coin Fund): Enduring Investments
- Telegram: https://t.me/USDi_Coin