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SAM.gov is where the US government registers the entities it pays and records the ones it may not. Federal agencies enter every exclusion there: the Department of Health and Human Services excludes providers from Medicare and Medicaid, the Office of Personnel Management from federal employees’ health benefits, and the Department of Justice, the EPA, HUD, the military services and some fifty other agencies debar or suspend contractors and grantees. An excluded party may not receive federal contracts, grants or program payments. Every exclusion in force, about 168,000: some 133,000 people, 8,300 firms, 25,600 other entities such as clinics and pharmacies, and 1,300 vessels. Each comes with the party’s name, city and state, its Unique Entity ID, CAGE code or National Provider Identifier when it has one, the excluding agency, the kind of exclusion and its dates. Brought up to date every day. SAM.gov also carries the Treasury’s OFAC sanctions list, one row per name and alias, under the agency OFAC (about 42,000 rows); its copy lags OFAC’s own. For current sanctions use OFAC sanctions or the Consolidated Screening List.
The whole source, organized and ready to query: every endpoint on this page answers in milliseconds. Every response carries as_of: how current the data is. How datasets work.

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Search exclusions

POST /us/sam/exclusions-search/v1 Dataset Searches every exclusion in force by any combination of name, classification, agency, kind of exclusion, state, identifier and date.
Returns as_of (how current the data is), the applied filters, total (matches across every page), page, per_page, total_pages, count and exclusions[], by name. Every exclusion carries id (SAM.gov’s number for the record, the key), classification (individual, firm, special_entity_designation or vessel), name, a person’s prefix, first_name, middle_name, last_name and suffix, address_1, address_2, city, state, zip_code, country (three letters, e.g. USA), uei (Unique Entity ID), cage, npi (National Provider Identifier), exclusion_program (Reciprocal, Procurement or NonProcurement), excluding_agency, ct_code, exclusion_type, comments (the agency’s note), cross_reference (other names and related parties), active_date, termination_date (null when indefinite), indefinite, record_status and updated_date. Empty fields are null. SAM.gov publishes no street address for a person.
The list carries the exclusions in force. Brought up to date daily; an exclusion that ends stops matching.
A name match is a starting point, not a determination. Confirm a hit against the party’s Unique Entity ID, CAGE code, NPI or location before acting on it: many excluded people share common names.

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One exclusion

POST /us/sam/exclusion/v1 Dataset Resolves one exclusion by its SAM number and returns the full record.
Returns found, id, as_of and exclusion (null when not found). Every exclusion carries id (SAM.gov’s number for the record, the key), classification (individual, firm, special_entity_designation or vessel), name, a person’s prefix, first_name, middle_name, last_name and suffix, address_1, address_2, city, state, zip_code, country (three letters, e.g. USA), uei (Unique Entity ID), cage, npi (National Provider Identifier), exclusion_program (Reciprocal, Procurement or NonProcurement), excluding_agency, ct_code, exclusion_type, comments (the agency’s note), cross_reference (other names and related parties), active_date, termination_date (null when indefinite), indefinite, record_status and updated_date. Empty fields are null. SAM.gov publishes no street address for a person.
An id the list does not carry returns found: false with HTTP 200, not an error. That is also the answer for an exclusion that has ended.

Full reference

Schemas, all response fields, and an interactive playground.