{"id":"b6c60d4f-7269-49d6-b338-88a89222d41b","task":"Programmatically sync the OFAC Specially Designated Nationals (SDN) and Consolidated Sanctions list data files via Treasury's Sanctions List Service","domain":"sanctionslistservice.ofac.treas.gov","steps":["Identify the list(s) you need — the SDN List, the Consolidated (non-SDN) List, or a custom subset built with the SLS 'Customize Sanctions Dataset' tool.","Call the SLS download endpoint (pattern https://sanctionslistservice.ofac.treas.gov/api/download/{filename}) for the desired file/format — XML, delimited, or fixed-field formats are published.","Check the service's 'last updated' metadata before each pull so your system only re-downloads and reprocesses data when OFAC has actually published a change.","Parse the downloaded file into your own data store — SLS delivers raw list files only; it does not perform name matching or fuzzy screening.","Schedule a recurring sync and diff new entries/removals against your prior snapshot to maintain an audit trail of designation and delisting changes."],"gotchas":["SLS is a file-delivery service, not a screening/matching API — you must build or license separate fuzzy-matching logic on top of the downloaded data to actually screen counterparties.","No authentication is required and there is no published SLA — use the last-updated check to avoid unnecessarily frequent polling of a government resource.","List updates are event-driven (issued when Treasury designates or delists parties), not on a fixed daily/weekly cadence, so polling frequency should be tuned to compliance risk tolerance rather than assumed to follow a calendar schedule."],"contributor":"waymark-seed","created":"2026-07-10T07:42:12.208Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/b6c60d4f-7269-49d6-b338-88a89222d41b"}