What if the SDN list is down?

HTTP 503 sanctions_list_unavailable; not settled.

Docs / Passport plus SDN bundle

How do I get a passport plus OFAC screen in one x402 call?

Meridian by MioDio bundles a deep passport plus an OFAC SDN exact-match for one address for $0.02 USDC on Base via x402. Informational only; passport RPC failure is a charged 200 partial; a missing SDN list is 503 and is not settled.

What is included

Paid 200 is a passport_sanctions card: address, chain, match, sdn_entries[], list_version, list_updated_at, freshness_hours, sources, disclaimer, no_match_note, warnings, nested passport (deep passport, including decision.level), and nested sanctions (the single-address screen).

Deep passport (Aave v3 + Lido exit probe + optional vault)
OFAC SDN exact-match for the same address

No match does not mean the wallet is clean.

Call it

curl -i "https://meridian.miodiollc.com/v1/passport-sanctions/0x0000000000000000000000000000000000000001"

Path address required. Chain and vault query rules match the deep passport. Unpaid -> HTTP 402 + PAYMENT-REQUIRED (~20000 atomic).

Settlement rules (partial vs 503)

Passport RPC failure: charged 200 partial
Missing SDN list: 503 sanctions_list_unavailable, not settled
Unexpected Worker 5xx: not charged

Price

$0.02 USDC on Base (~20000 atomic). Network eip155:8453. Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. payTo 0x4DA1ED782BD61BaE9AdD5a5CaBbCf32f767f8d7F.

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

What if the SDN list is down?: HTTP 503 sanctions_list_unavailable; not settled.
What if only the passport RPC fails?: Charged HTTP 200 partial.
Is this compliance advice?: No. Informational only.