Glossary - Aegis

Terms

Term	Definition
Agent	An autonomous program, AI model, or service that interacts with the Aegis API. Each agent has a unique email, wallet, and policy configuration.
Arc Network	A Circle backed EVM-compatible blockchain where USDC is the native gas token. Aegis creates agent wallets on Arc.
aUSDC	Aegis USDC — yield-bearing share tokens received when an agent deposits USDC into the Aegis Yield Vault. The value of aUSDC appreciates as yield is injected into the vault.
Bearer Token	The API authentication credential issued during `/v1/connect/complete`. Prefixed with `aegis_live_`.
CCTP	Circle Cross-Chain Transfer Protocol. Used by Aegis to bridge USDC between supported blockchain networks.
Circuit Breaker	A resilience pattern used in Aegis service calls. After repeated failures to an external service, the circuit breaker temporarily blocks requests to prevent cascading failures.
Connect Challenge	The email based OTP verification flow used to register agents and issue API tokens.
DCA (Dollar-Cost Averaging)	A wealth engine strategy that executes recurring token purchases at fixed intervals. The Wealth Sentinel processes DCA schedules automatically.
DCW	Developer Controlled Wallet. Circle’s managed wallet infrastructure where private keys are stored in HSM-backed secure enclaves.
Dual-Header Auth	Aegis’s authentication scheme requiring both `Authorization: Bearer <token>` and `X-Aegis-Email: <email>` headers on every request.
EOA	Externally Owned Account. The type of wallet Aegis provisions for agents — a standard EVM address controlled by a private key (managed by Circle).
EURC	EUR Coin. A euro backed stablecoin issued by Circle. Supported as a balance token on Arc Testnet.
Gas Abstraction	On the Arc Network, USDC is the gas token. Agents don’t need to hold ETH or any other token to pay for transaction fees.
Idempotency Key	A unique UUID v4 sent with financial actions to prevent duplicate execution on retries.
Limit Order	A wealth engine intent that registers a conditional swap to be executed automatically when a target price is reached. Monitored by the Wealth Sentinel.
Marketplace	The Circle Discovery API integrated into Aegis, providing a catalog of x402-compatible paid API services.
Multi-Yield	An allocation strategy that splits a single USDC deposit across multiple yield protocols (Aegis Vault and Synthra V3) in a single atomic action.
Nonce	A monotonically increasing counter per agent. Must be included in financial action requests to prevent replay attacks.
OTP	One-Time Password. A 6-character hex code sent to the agent’s email during onboarding. Valid for 10 minutes.
Policy Engine	The spending limit enforcement layer that checks every financial action against per-transaction, daily, weekly, and monthly caps.
Sliding Window Rate Limit	The rate limiting algorithm used by Aegis. Requests are counted in a rolling time window rather than fixed intervals.
Synthra V3	A Uniswap V3-style concentrated liquidity AMM deployed on Arc Testnet. Aegis integrates with Synthra for high-capital-efficiency yield generation via tight price range liquidity positions.
USDC	USD Coin. A fully backed US dollar stablecoin issued by Circle. The primary currency used in Aegis for all financial actions.
Wealth Sentinel	An autonomous background process that runs every 5 minutes, scanning and executing pending limit orders and DCA schedules when conditions are met.
x402	An HTTP-based micropayment protocol where services respond with `402 Payment Required` and payment instructions. Aegis handles the negotiation and payment automatically.
Audit Log	An append only record of every financial action attempted by an agent, including successes, failures, and policy rejections.
Yield Distributor	A background cron process that injects real USDC yield into the Aegis Vault contract hourly, driving up the `pricePerShare` for all depositors.

Documentation Index

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