Identifiers

Resolve DUNS ↔ UEI

Free reverse lookup between legacy DUNS (9 digits, or 13-digit DUNS+4) and current UEI (12 alphanumeric). Accepts either side; returns both plus the entity name and FFATA evidence count.

Coverage truth. The crosswalk is built from FFATA Section 2 subaward filings since FY2025, where both identifiers co-exist on the same record. A 404 here means not in the FFATA-derived crosswalk (about 24K firms indexed), not not in SAM. The official SAM DUNS↔UEI translator is admin-gated and not publicly available.

get/api/v1/identifiers/{identifier}

Request

  • Base URL: https://govconapi.com (the document declares no server; this is the origin it was published from)
  • URL: https://govconapi.com/api/v1/identifiers/{identifier}
  • Auth: HTTP bearer

Path parameters

identifierstring required

Response

Pair found. Returns DUNS, UEI, entity name, evidence count, last seen.

unknown required

Changes

No recorded changes to this operation across all 1 revision of this API.