[May 28, 2026] Standalone Multi-Watchlist Search

A new endpoint lets you search any combination of watchlists by name — without running a full business verification:

GET /watchlists?q={name}&watchlists=OFAC&watchlists=PEP

Available lists: OFAC, PEP, CSL, FBI, CNS, OIG. Pass any subset via the watchlists parameter; one billable order is written per list requested.

Results are grouped by source. Every requested watchlist returns an entry in the response — including lists with zero matches — so you can confirm exactly which lists were searched. Each match includes a similarity_score and source-specific details.

Two optional params: similarity_threshold (0.0–1.0, defaults to 0.9) and limit (up to 50 matches per list, defaults to 5).

Request

GET https://api.baselayer.com/watchlists?q=Rafael+Sarria&watchlists=OFAC&watchlists=OFAC&watchlists=CSL

Response

{
  "results": [
    {
      "source": "OFAC",
      "matches": [
        {
          "name": "SARRIA DIAZ, Rafael Alfredo",
          "similarity_score": 1,
          "details": {
            "name": "SARRIA DIAZ, Rafael Alfredo",
            "alternative_names": [
              "SARRIA-DIAZ, Rafael A",
              "SARRIA, Rafael"
            ],
            "program": "VENEZUELA",
            "title": " ",
            "remarks": "DOB 11 Nov 1965; Gender Male; Cedula No. 6974302 (Venezuela); Passport 114910699 (Venezuela) expires 02 Feb 2020; alt. Passport F0018546 (Venezuela) expires 02 Jul 2014; Linked To: CABELLO RONDON, Diosdado.",
            "source": "SDN",
            "entity_number": "24427",
            "type": "individual",
            "addresses": [
              ", Miranda, Venezuela,  | La Moraleja, Madrid, Spain,  | 5599 NW 23rd Ave, Boca Raton, FL 33496, United States,  | 480 Park Avenue, Apt. 10B, New York, NY 10022, United States,  | Calle de la Pena Pintada, 11, Madrid, Comunidad de Madrid 28034, Spain,  | Calle Los Malabares, Quinta Anauco, Valle Arriba, Caracas, Miranda 1080, Venezuela, "
            ],
            "source_list_url": "https://sanctionslist.ofac.treas.gov/Home/SdnList",
            "source_information_url": "https://home.treasury.gov/policy-issues/financial-sanctions/specially-designated-nationals-and-blocked-persons-list-sdn-human-readable-lists"
          }
        }
      ],
      "count": 1
    },
    {
      "source": "CSL",
      "matches": [
        {
          "name": "SARRIA DIAZ, Rafael Alfredo",
          "similarity_score": 1,
          "details": {
            "source": "SDN",
            "csl_id": "24427",
            "entity_number": "24427",
            "type": "Individual",
            "programs": "VENEZUELA",
            "name": "SARRIA DIAZ, Rafael Alfredo",
            "title": null,
            "addresses": [
              "Miranda, VE",
              "La Moraleja, Madrid, ES",
              "5599 NW 23rd Ave, Boca Raton, FL, 33496, US",
              "480 Park Avenue, Apt. 10B, New York, NY, 10022, US",
              "Calle de la Pena Pintada, 11, Madrid, Comunidad de Madrid, 28034, ES",
              "Calle Los Malabares, Quinta Anauco, Valle Arriba, Caracas, Miranda, 1080, VE"
            ],
            "alt_names": [
              "SARRIA-DIAZ, Rafael A",
              "SARRIA, Rafael"
            ],
            "source_list_url": "https://sanctionslist.ofac.treas.gov/Home/SdnList",
            "source_information_url": "https://home.treasury.gov/policy-issues/financial-sanctions/specially-designated-nationals-and-blocked-persons-list-sdn-human-readable-lists"
          }
        }
      ],
      "count": 1
    }
  ],
  "total_matches": 2
}

OFAC Match Details at Parity with CSL

At the same time, the details object returned for OFAC matches in watchlist responses has been updated to match the structure already returned for CSL matches. No integration changes required, but if you're parsing OFAC details fields directly, review your mapping against the updated response shape.