Is this a compliance tool?

No. It is an informational exact-match against the public OFAC SDN list only. Not legal or compliance advice, and not a substitute for a compliance program.

Does no match clear the wallet?

No. The response always includes that caveat. No match does not mean the wallet is clean. A miss is not clearance.

Where does the list come from?

Public U.S. Treasury OFAC SDN digital-currency addresses, with the ITA Consolidated Screening List as the official fallback. A worker cron refreshes a daily extract. See /health.sanctions and /llms.txt.

Do I need an API key?

No. Pay per call in USDC on Base via x402. No account.

What if the list is unavailable?

HTTP 503 sanctions_list_unavailable, and the call is not settled.

Docs / OFAC SDN exact-match screen

How do I screen a wallet against OFAC before my AI agent pays?

Meridian by MioDio exact-matches one digital-currency address against public OFAC SDN Digital Currency Address entries for $0.005 USDC on Base via x402. It is informational only. No match does not mean the wallet is clean.

What this check gives back

Paid JSON includes match (bool), sdn_entries[] (name, program, list_date), list_version, list_updated_at, freshness_hours, sources, disclaimer, no_match_note, and warnings. A paid 2xx may also carry a signed Meridian-Receipt header.

Call it (curl + 402 flow)

# Unpaid probe -> HTTP 402 + PAYMENT-REQUIRED
curl -i "https://meridian.miodiollc.com/v1/sanctions/0x098B716B8Aaf21512996dC57EB0615e2383E2f96"

# Free fixed demo (no payment)
curl -s "https://meridian.miodiollc.com/v1/demo/sanctions"

Route: GET /v1/sanctions/{address}. Optional query chain hints the OFAC Digital Currency chain (ETH, XBT, USDT, TRX, and others). ethereum/base map to ETH. Omit chain to exact-match the address across listed chains.

Unpaid calls return HTTP 402 with the PAYMENT-REQUIRED header and the same x402 v2 PaymentRequired object in the JSON body (x402Version, accepts, resource). Retry with PAYMENT-SIGNATURE after Exact USDC on Base.

Price and payment

$0.005 USDC on Base (~5000 atomic). Network eip155:8453. Asset Base USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. payTo 0x4DA1ED782BD61BaE9AdD5a5CaBbCf32f767f8d7F. No account. No API key. Invalid address is turned away before payment.

Limits and errors

Exact address match only. No names, owners, indirect links, history, or non-US lists.
503 sanctions_list_unavailable when the SDN list is missing (not settled).
Check list_version and freshness_hours on every answer.

Free demo

curl -s "https://meridian.miodiollc.com/v1/demo/sanctions"

Demo card (abridged, live 2026-11-05): match=true for a Lazarus Group sample address; sources=["OFAC SDN"]; no_match_note carries the required caveat.

{
  "card": "sanctions_screen",
  "version": "0.9.0",
  "address": "0x098b716b8aaf21512996dc57eb0615e2383e2f96",
  "match": true,
  "sdn_entries": [
    { "name": "LAZARUS GROUP", "program": "unspecified", "list_date": "10/28/2026" }
  ],
  "list_version": "10/28/2026",
  "sources": ["OFAC SDN"],
  "no_match_note": "No match does not mean the wallet is clean.",
  "warnings": []
}

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.

FAQ

Is this a compliance tool?: No. It is an informational exact-match against the public OFAC SDN list only. Not legal or compliance advice, and not a substitute for a compliance program.
Does no match clear the wallet?: No. The response always includes that caveat. No match does not mean the wallet is clean. A miss is not clearance.
Where does the list come from?: Public U.S. Treasury OFAC SDN digital-currency addresses, with the ITA Consolidated Screening List as the official fallback. A worker cron refreshes a daily extract. See /health.sanctions and /llms.txt.
Do I need an API key?: No. Pay per call in USDC on Base via x402. No account.
What if the list is unavailable?: HTTP 503 sanctions_list_unavailable, and the call is not settled.