CA
California
~300,000 licensed contractors
CSLB - Contractors State License Board

Licenses general (B), specialty (C-series), and engineering (A) contractors. Bond and insurance tracking. Full disciplinary action history.

license_numberstatusexpiration_datebond_amountdisciplinary_actions
GET /v1/verify?state=CA&license_number=1034521
TX
Texas
~150,000 licensed contractors
TDLR - Texas Dept. of Licensing and Regulation

Covers electrical, HVAC, and plumbing contractors. General contractors are not licensed at the state level in TX (county-level regulation).

license_numberstatusexpiration_dateaddress
GET /v1/verify?state=TX&name=Smith+Electric+LLC
FL
Florida
~90,000 licensed contractors
DBPR - Dept. of Business & Professional Regulation

State licensing for general, building, residential, electrical, plumbing, and AC contractors. License types: CGC, CBC, CRC, EC, FC, PC, AC, CFC.

license_numberstatusissue_dateexpiration_date
GET /v1/verify?state=FL&license_number=CGC1234567
NY
New York
~80,000 licensed contractors
DOS - Department of State

Home improvement contractors, electrical workers, and plumbers. NYC and Nassau County have additional local licensing requirements.

license_numberstatusexpiration_datelicense_type
GET /v1/verify?state=NY&name=Metro+Plumbing+Inc
IL
Illinois
~60,000 licensed contractors
IDFPR - Dept. of Financial & Professional Regulation

Roofing, electrical, and other specialty contractors. General contractors licensed at the municipal level (Chicago requires separate licensing).

license_numberstatusexpiration_date
GET /v1/verify?state=IL&license_number=105012345
PA
Pennsylvania
~65,000 licensed contractors
BPOA - Bureau of Professional & Occupational Affairs

Home improvement contractors, electrical, and plumbing. The Home Improvement Consumer Protection Act requires registration for projects over $500.

license_numberstatusexpiration_dateaddress
GET /v1/verify?state=PA&name=Keystone+Builders
OH
Ohio
~55,000 licensed contractors
OCILB - Ohio Construction Industry Licensing Board

Electrical, HVAC, hydronics, plumbing, and refrigeration contractors. Licensing separate from general contractors (local regulation).

license_numberstatusexpiration_date
GET /v1/verify?state=OH&license_number=OH12345E
GA
Georgia
~50,000 licensed contractors
SOS - Georgia Secretary of State

Georgia Composite Board licenses general and specialty contractors. Fast verification via public SOS lookup - one of the cleaner state APIs.

license_numberstatuslicense_typeaddress
GET /v1/verify?state=GA&license_number=GC123456
NC
North Carolina
~45,000 licensed contractors
NCLBGC - NC Licensing Board for General Contractors

Required for projects over $30,000. Limited, intermediate, and unlimited license classifications. Separate boards for electrical, plumbing, and HVAC.

license_numberstatusclassificationexpiration_date
GET /v1/verify?state=NC&name=Blue+Ridge+Construction
AZ
Arizona
~55,000 licensed contractors
ROC - Registrar of Contractors

One of the most comprehensive state boards. Tracks bond amounts, insurance requirements, disciplinary actions, and complaint history. Excellent public search API.

license_numberstatusbond_amountdisciplinary_actionsinsurance_required
GET /v1/verify?state=AZ&license_number=ROC123456

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