{"schema":"draconic21.sanctions_delta_availability.v1","available":true,"price_usdc":0.008,"source":"OFAC's own official change-tracking feed (sanctionslistservice.ofac.treas.gov/changes/...), durable index + live top-up","note":"POST with { since: \"YYYY-MM-DD\", entity_type?, crypto_only?, limit? } to try it. See /v1/sanctions_delta/example."}