# Meridian

> Pre-sign checks for agents: call Meridian before you sign. mio_dio_defi_risk_passport: a read-only x402 pay-per-call HTTP API. Public on-chain Aave, Lido, ERC-4626 vault, OFAC SDN exact-match, parameter-drift, and transaction-simulation cards. Never holds keys, does not sign, and does not move funds. Not an A2A JSON-RPC task server.

- **Domain**: `meridian.miodiollc.com`
- **Provider**: MioDio LLC (https://meridian.miodiollc.com)
- **A2A protocol version**: 1.0
- **Kind**: paid_api
- **Live-responds (last probe)**: None
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 90%
- **Payment protocol**: x402 · network `eip155:8453`
- **Wallet**: `0x4da1ed782bd61bae9add5a5cabbcf32f767f8d7f`

## Skills
- **Aave v3 risk card** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian Aave v3 risk card for an EVM address: health factor, collateral, debt and liquidation dis
- **Lido exit-risk card** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian Lido exit-risk card: stETH/ETH Curve peg, withdrawal-queue ETA and exit liquidity for a s
- **ERC-4626 vault risk card** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian ERC-4626 vault risk card: share price, drawdown, APY lookback and idle cash for one vault
- **Deep passport** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian deep passport: one decision card joining Aave v3, Lido exit and optional ERC-4626 vault r
- **OFAC SDN screen** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian OFAC SDN screen: exact match of one digital-currency address against public SDN Digital C
- **Passport + SDN bundle** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian bundle: deep passport plus OFAC SDN exact-match screen for one EVM address (~$0.02 USDC E
- **OFAC SDN batch screen** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian OFAC SDN batch screen: exact match of 1-50 digital-currency addresses against public SDN 
- **Parameter-drift check** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian parameter-drift check: diffs a declared intent against the exact unsigned tx or EIP-712 p
- **Transaction simulation** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian transaction simulation: dry-run of an unsigned tx against latest Base/Ethereum state (~$0
- **USDC payment check** — Pre-sign check: agents call Meridian before they sign. MioDio Meridian payment-check: on-chain read of a Base USDC Exact authorization or Transfer (~$0.005 USDC

## URLs
- Agent card: https://meridian.miodiollc.com/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/meridian.miodiollc.com
- Documentation: https://meridian.miodiollc.com/docs