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Look up a SAM.gov registered entity

lookup_entity
Read-onlyIdempotent

Look up a federal contractor registration in SAM.gov by Unique Entity ID (UEI) or legal business name: registration status, CAGE code, physical address, business types (SDVOSB, 8(a), HUBZone, etc.), and NAICS codes. Call this to vet a teaming partner, check a competitor, or confirm an entity is award-eligible. Public registration sections only. Requires the caller's own free SAM.gov API key (X-Sam-Api-Key header or sam_api_key argument).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ueiNo12-character Unique Entity ID
nameNoLegal business name (partial match allowed) - used when no UEI given
sam_api_keyNoYour own free SAM.gov API key. Required unless it is already set as the X-Sam-Api-Key header on the MCP connection; this server has no shared SAM.gov key. Get one free at sam.gov: sign in, open your profile (Account Details), request a public API key. Docs: https://open.gsa.gov/api/get-opportunities-public-api/. Never logged or stored.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / sam_api_key / description
      Previous value: -"Optional: your own free SAM.gov API key (from sam.gov → Account Details). With it you spend your own 1,000/day quota and skip the shared budget. Can also be sent once as the X-Sam-Api-Key header on the MCP connection."New value: +"Your own free SAM.gov API key. Required unless it is already set as the X-Sam-Api-Key header on the MCP connection; this server has no shared SAM.gov key. Get one free at sam.gov: sign in, open your profile (Account Details), request a public API key. Docs: https://open.gsa.gov/api/get-opportunities-public-api/. Never logged or stored."
  2. Changed1 schema field changed
    • changedInput schema / properties / name / description
      Previous value: -"Legal business name (partial match allowed) — used when no UEI given"New value: +"Legal business name (partial match allowed) - used when no UEI given"
  3. First observed

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