Crypto Gloss

agEUR

agEUR is a Euro-pegged decentralized stablecoin issued by Angle Protocol, deployed on Ethereum in November 2021, using a Transmuter mechanism that allows direct 1:1 swapping between agEUR and stablecoin collateral (USDC, EURC) without requiring over-collateralization above 100% — making it the DeFi-native EUR stablecoin with the deepest on-chain liquidity.

Angle Protocol’s design has evolved significantly through multiple versions: the original V1 used a unique Core Module combining USDC collateral with a specialized Hedging Agent mechanism; V2 introduced the Transmuter, Angle’s primary stability innovation. Angle Protocol also operates a Borrowing Module where users can over-collateralize with ETH or WBTC to mint agEUR, similar to MakerDAO’s CDP system. In 2024, Angle expanded with USDA (a USD-pegged stablecoin using the same mechanisms), positioning itself as a multi-currency stablecoin issuer.

Key Facts

  • Protocol: Angle Protocol
  • Launched: November 2021 (Ethereum)
  • Stablecoin: agEUR (EUR-pegged)
  • Secondary stablecoin: USDA (USD-pegged, launched 2024)
  • Governance token: ANGLE (veANGLE voting system)
  • Primary mechanism: Transmuter (V2)
  • Secondary mechanism: Borrowing module (over-collateralized)
  • Chains: Ethereum, Polygon, Arbitrum, Optimism, others

Transmuter Mechanism (V2)

The Transmuter is Angle’s core stability innovation:

How it works:

  1. User: deposits USDC into Transmuter
  2. Protocol: mints agEUR at EUR/USD market rate (1:1 in collateral terms)
  3. User: deposits agEUR into Transmuter
  4. Protocol: redeems USDC (or other collateral) at EUR/USD rate

Key properties:

  • Direct 1:1 swap: No slippage within capacity limits
  • Collateral basket: Multiple stablecoins (USDC, EURC, other) in the Transmuter
  • Stable peg: Any USDC holder can create agEUR or redeem agEUR for USDC at fair value
  • No over-collateralization required: 100% backing sufficient (vs. DAI’s 150%)

Angle V1 vs. V2

Feature V1 (Core Module) V2 (Transmuter)
Primary mechanism Standard Agents + Hedgers Transmuter (direct swap)
Collateral USDC (primary) Multi-stablecoin basket
Stability Hedging Agent system Direct redemption
Capital efficiency Complex Simple and direct
Status Legacy Current primary

agEUR DeFi Integrations

Key DeFi integrations building agEUR utility:

  • Curve Finance: agEUR/3CRV pool; agEUR/EURS pool; significant TVL
  • Aave: agEUR as lending/borrowing asset (v2 and v3)
  • Euler Finance: agEUR lending (before Euler exploited)
  • Uniswap v3: agEUR/USDC concentrated liquidity positions
  • Angle Borrowing: Native CDP-style over-collateralized borrowing

History

  • November 2021 — Angle Protocol and agEUR launch on Ethereum mainnet. V1 Core Module with Hedging Agent mechanism goes live.
  • 2022 — agEUR liquidity grows on Curve and Aave. agEUR becomes the most liquid DeFi-native EUR stablecoin, with deep Curve pools.
  • March 2023 — Euler Finance hack. Euler’s $197M exploit directly impacts Angle Protocol, as Angle held USDC collateral in Euler. agEUR temporarily depegs.
  • 2023 — V2 Transmuter launches. Angle replaces the complex Hedging Agent model with the simpler direct-swap Transmuter mechanism. Partial recovery from Euler losses.
  • 2024 — USDA launches. Angle expands to a USD-pegged stablecoin using the Transmuter, positioning as a multi-currency stablecoin issuer.

Common Misconceptions

“agEUR requires over-collateralization like DAI.”

The Transmuter mechanism allows 1:1 swapping without over-collateralization ratios above 100%. The Borrowing Module (CDP) is a separate optional feature; the primary Transmuter does not require it.

“agEUR is backed by fiat euros in a bank account.”

agEUR is a decentralized stablecoin backed by on-chain stablecoin collateral (USDC, EURC) and crypto collateral via the Borrowing Module — not by fiat held in traditional banking. This makes it different from EURS (STASIS) or EUROe which are fiat-backed.

Social Media Sentiment

  • r/DeFi / r/CryptoCurrency: Angle Protocol is known primarily in DeFi circles. The March 2023 Euler hack impact on agEUR is frequently referenced as a risk example for complex DeFi collateral dependencies.
  • X/Twitter: Active among EUR stablecoin users and European DeFi participants. USDA launch generated interest from non-EUR DeFi users. The Euler depeg incident remains a key discussion point.
  • Discord (Angle Protocol): Transmuter mechanics and collateral ratios are core discussion topics. Community tracks Curve pool depth and DeFiLlama TVL closely.

Last updated: 2026-04

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