California CSLB data

California Contractor License API

Add California CSLB license checks to contractor onboarding and compliance workflows without building and maintaining your own source-data pipeline.

Verify a contractor license

Results are informational and should be confirmed against the official California Contractors State License Board record before making a hiring or compliance decision.

Authority

California Contractors State License Board

Live coverage

Statewide CSLB contractor classifications

Refresh cadence

Daily

Use CSLB data in one consistent workflow

Search by business name when a contractor has not supplied a license number, or verify a known number during onboarding. The same normalized record shape works in the StateLicense dashboard and API.

Treat a license match as one input to review. Confirm identity, current status, the classification required for the proposed work, and any relevant bond or workers’ compensation details.

Common California verification use cases

California license checks can be added to marketplace enrollment, vendor qualification, pre-hire review, renewal monitoring, and exception queues.

  • Validate a contractor-provided CSLB number.
  • Find possible records from a business name.
  • Route inactive, mismatched, or incomplete records for review.

Fields to include in your review

  • License status and expiration
  • Business and licensee identity
  • CSLB classifications
  • Bond information
  • Workers’ compensation information
  • Source and record timestamps

Freshness: Daily. Field availability depends on the source record; unavailable values are not inferred.