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CSLB California Licensed Contractor Lookup
x402
CSLB California Licensed Contractor Lookup is a paid API for AI agents from api.companyrecords-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).
Returns California licensed contractor records from the CSLB public data portal, filtered by license classification and optionally by county and city, with full business, contact, license, bond, and insurance details.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call company registry, government, legal and B2B data tools for AI agents, from official registers and public sources. Payment: x402, USDC on Base, Solana, Arc, Polygon, Arbitrum, Monad, World Chain, Optimism, Avalanche, Celo or Stellar, or RLUSD/XRP on the XRP Ledger. No signup, no API key; a failed call is not charged.
Output
A paginated JSON response containing a list of California contractor records matching the requested classification and optional county/city filters. Each record includes license number, business name and type, street address, city, zip, state, county, phone number, license issue and expiration dates, license status (e.g. CLEAR), classification codes, bond company name, and workers' compensation insurer name and type. The response also includes total record count, offset, classification, county, data source URL, and timestamp of when data was checked.
Example use cases
Vetting subcontractors for a construction project
“I need to verify that our plumbing subcontractors in San Diego County are properly licensed — can you pull the CSLB records for all C-36 licensed plumbers in San Diego County so I can cross-check their license numbers, status, and bond companies?”
Building a local contractor lead list
“Get me a list of up to 200 licensed general building contractors (class B) in Santa Clara County, California — I want their business names, phone numbers, addresses, and license expiration dates.”
Checking license status for a specific city
“Can you look up CSLB-licensed C-27 landscaping contractors operating in Fresno city, Fresno County, California? I need their license status, issue and expiration dates, and whether they have workers' comp coverage.”
Technical details
Endpoint
GEThttps://api.companyrecords-api.workers.dev/api/b2b/cslb-california?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, paginated access to California CSLB contractor license records — especially when you need bond and workers' comp insurer details alongside license status. It is ideal for compliance verification, contractor vetting, lead generation, or building datasets of licensed California contractors by trade classification. Prefer this over general web search when you need machine-readable, filterable records directly sourced from the CSLB public data portal.
Side effects
- Invalid or unrecognized classification code returns empty or error response
- County name misspelled or formatted incorrectly may return no results
- Large classification categories (e.g. B, C-10) without county filter may be very slow or return truncated results
- Pagination offset beyond total record count returns empty results list
- API returns stale data if CSLB portal has not been recently crawled
- Limit value outside 1-200 range may cause validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"total": 6,
"county": "Alameda",
"offset": 0,
"source": "https://www.cslb.ca.gov/OnlineServices/DataPortal/ListByCounty",
"checkedAt": "2026-10-23T09:37:34.396Z",
"contractors": [
{
"zip": "94607",
"city": "OAKLAND",
"phone": "(510) 864 1025",
"state": "CA",
"county": "Alameda",
"issued": "1986-06-30",
"status": "CLEAR",
"address": "333 MARKET ST",
"expires": "2028-06-30",
"bondCompany": "WESTERN SURETY COMPANY",
"businessName": "PARAMOUNT ELEVATOR CORPORATION",
"businessType": "Corporation",
"licenseNumber": "494395",
"classifications": [
"C11"
],
"workersCompType": "Workers' Compensation Insurance",
"workersCompInsurer": "INSURANCE COMPANY OF THE WEST"
},
{
"zip": "94544",
"city": "HAYWARD",
"phone": "(844) 646 9660",
"state": "CA",
"county": "Alameda",
"issued": "2016-05-03",
"status": "CLEAR",
"address": "31673 HAYMAN STREET",
"expires": "2028-05-31",
"bondCompany": "WESTERN SURETY COMPANY",
"businessName": "AMERITEX ELEVATOR WEST LLC",
"businessType": "Limited Liability",
"licenseNumber": "1013755",
"classifications": [
"C11"
],
"workersCompType": "Workers' Compensation Insurance",
"workersCompInsurer": "XL INSURANCE AMERICA INC"
}
],
"classification": "C-11"
}
}Tags
x402
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