Does unknown wallet mean safe?

No. EIP-7702 vs known-wallet allowlist: unknown if unlisted; never safe.

How do lookalike checks work?

Optional. Requires counterparties and/or from query (caller-list lookalike only, max 20 unique).

Docs / Recipient readiness card

How do I check recipient readiness before my agent sends funds?

Meridian by MioDio's GET /v1/recipient/:address gives back a recipient readiness card for $0.005 USDC on Base via x402: Base vs Ethereum code, EIP-7702 vs a known-wallet allowlist (unknown if unlisted; never safe), USDC freeze on Base and Ethereum, USDT freeze on Ethereum only, OFAC exact match, burn/token flags, and optional lookalike checks. Informational, not advice.

Signals included

Paid 200 is a recipient_readiness card. Keys: product, card, version, status (ok or partial), address, chain, checked_chains, as_of, observed_at, disclaimer, code (this_chain, other_chain, undeployed_other_chain_trap), eip7702, freeze (USDC on Base and Ethereum; USDT on Ethereum only), sanctions (match, sdn_entries, list_version, list_updated_at, sources), known_address, poisoning (null unless counterparties/from are sent), optional errors.

Signals from that card:

Base vs Ethereum code (undeployed-code trap uses the selected this-chain)
EIP-7702 vs a known-wallet allowlist (unknown if unlisted; never safe)
USDC freeze on Base and Ethereum
USDT freeze on Ethereum only
OFAC exact match
Burn / token flags
Optional address-poisoning (lookalike) from query counterparties and from

Query parameters

Path address (required): EVM address, 0x-prefixed hex
Query chain: base or ethereum (default base) for the undeployed-code trap
Query counterparties: optional comma-separated past counterparties (max 20)
Query from: optional extra counterparty (usually the sender); combined with counterparties, max 20 unique

Call it

curl -i "https://meridian.miodiollc.com/v1/recipient/0x0000000000000000000000000000000000000001?chain=base"

Unpaid -> HTTP 402 + PAYMENT-REQUIRED. Both-chain fail -> 503 and not settled. Partial 200 is possible when some reads succeed.

Price

$0.005 USDC on Base (~5000 atomic). Network eip155:8453. Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. payTo 0x4DA1ED782BD61BaE9AdD5a5CaBbCf32f767f8d7F.

Errors

400 invalid_address / unsupported_chain / query_too_long (after payment: not settled)
402 unpaid
503 when both-chain fail or SDN list unavailable (not settled)
Partial 200 when some reads succeed

What it does NOT do

Meridian by MioDio never holds keys, does not sign user transactions, and does not move funds.
Not financial, legal, or compliance advice. Screens, drift, and simulation are informational and point-in-time where that applies.
Not a substitute for a compliance program.
No MCP server and no SDK are available today.

Unpaid calls return HTTP 402 with PAYMENT-REQUIRED. Retry with PAYMENT-SIGNATURE.

FAQ

Does unknown wallet mean safe?: No. EIP-7702 vs known-wallet allowlist: unknown if unlisted; never safe.
Is this legal advice?: No. Informational, not advice.
What freeze coverage exists?: USDC freeze on Base and Ethereum. USDT freeze on Ethereum only.
How do lookalike checks work?: Optional. Requires counterparties and/or from query (caller-list lookalike only, max 20 unique).