PrimaryCheck
Get API key
Menu

Verify a Missouri Plumber license

blockedMO Contractor Licensing Board · profession key plumber

Blocked. This board blocks automated lookups from our region. We say so instead of guessing; we are working on an approved access path.

How Missouri Plumber license verification works

A Plumber in Missouri is licensed by the MO Contractor Licensing Board. When this board is live, PrimaryCheck will query it directly for status, expiration and disciplinary actions and attach the board's record as evidence. Until then the API answers honestly with unable_to_verify and the reason, and the coverage endpoint reports this row as blocked.

What a Plumber license check returns

Field checkPasses when
license_numberEqual to the board's number, ignoring prefix and leading zeros
nameLast name or declared alias matches; first name exact or nickname
license_typeThe record is a Plumber license, strictly (no near-miss types)
statusThe board shows an active status; probation is active with a flag
expiresExpiration is on or after today, where the board publishes it
disciplinary_actionsRecorded and flagged with any order documents; never silently dropped

Verdicts: verified, discrepancy, not_found, unable_to_verify (with a reason), pending. See how verdicts are decided.

Verify a Missouri Plumber license by API

POST https://api.primarycheck.com/v1/verifications
{
  "person": { "firstName": "…", "lastName": "…" },
  "claims": [
    { "type": "license", "state": "MO", "profession": "plumber", "number": "…" }
  ],
  "purpose": "employment",
  "consent": { "consentId": "cons_…" }
}

Quickstart · License claim reference · Run one in the dashboard

Other Missouri licenses from the MO Contractor Licensing Board

More Missouri license checks

Plumber license verification in nearby states

All 51 jurisdictions: license verification coverage.