Verify a Minnesota Plumber license
plumberLive. We query the board directly for every check and the nightly canary is passing.
How Minnesota Plumber license verification works
A Plumber in Minnesota is licensed by the MN Contractor Licensing Board. PrimaryCheck looks the license up live at the board's public verification system (board lookup) by license number, or by name when no number is supplied. The record the board publishes is captured as evidence, hashed, and rendered into a proof PDF.
Fields returned for this board: status expires issued license_type address enforcement_action renewal_in_progress.
Board note: DLI Construction Codes and Licensing Division nightly CSV exports (secure.doli.state.mn.us/ccld/data/MNDLILicRegCertExport_{Electrical,Plumbing,Residential_Contractors}.csv; every column kept; max age 3 days). Electricians (Class A/B Master, Journeyworker A/B, Power Limited Technician…), plumbers (Master, Journeyworker, Restricted), residential contractors (Qualifying Builder/Remodeler/Roofer/Installer = the person; the business licence BC… does not print its qualifier → ambiguous_match for a person). HVAC is not a Minnesota state licence (Mechanical Contractor Bond is a business bond) — not covered. The interactive iMS lookup (ims.dli.mn.gov) is behind a login/guest wall and was not used. 2026-11-04.
What a Plumber license check returns
| Field check | Passes when |
|---|---|
license_number | Equal to the board's number, ignoring prefix and leading zeros |
name | Last name or declared alias matches; first name exact or nickname |
license_type | The record is a Plumber license, strictly (no near-miss types) |
status | The board shows an active status; probation is active with a flag |
expires | Expiration is on or after today, where the board publishes it |
disciplinary_actions | Recorded 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 Minnesota Plumber license by API
POST https://api.primarycheck.com/v1/verifications
{
"person": { "firstName": "…", "lastName": "…" },
"claims": [
{ "type": "license", "state": "MN", "profession": "plumber", "number": "…" }
],
"purpose": "employment",
"consent": { "consentId": "cons_…" }
}Quickstart · License claim reference · Run one in the dashboard
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All 51 jurisdictions: license verification coverage.