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Washington State Contractor License Lookup
x402
Washington State Contractor License Lookup is a paid API for AI agents from win.oneshotagent.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Looks up Washington State contractor licenses by license number, UBI, or business name, returning status, type, specialties, and expiration dates.
Price / call$0.005
Success—
StatusUnknown
How this service works
Look up Washington State contractor licences by licence number, state business identifier or business name, with status, type, specialties and expiration dates.
Output
Returns up to the requested number of matching contractor license records for Washington State, each including the business name, license number, UBI, license type, specialties, current status (active/inactive/expired), and expiration date.
Example use cases
Verify contractor before hiring
“I'm about to hire a contractor for a home renovation in Washington — can you look up 'Summit Construction Group' in the Washington contractor register and tell me if their license is active and what it covers?”
License number status check
“Can you pull up the Washington State contractor license SUMMICO*123AA and tell me if it's still valid and when it expires?”
Due diligence on business UBI
“I have a business UBI number 603-456-789 for a Washington contractor — can you look them up and tell me their license status, specialties, and any relevant details?”
Technical details
Endpoint
POSThttps://win.oneshotagent.com/v1/tools/lookup/company-contractor-license?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to verify or retrieve contractor license information for Washington State businesses. It is the right choice when you have a license number, UBI, or business name and need authoritative license status, type, specialties, or expiration data from the WA contractor register. Prefer this over generic web search when structured, machine-readable license data is required for compliance checks, due diligence, or contractor vetting workflows.
Side effects
- No matching license found for the given license number, UBI, or name fragment — returns empty results
- Name fragment too short (under 2 characters) or too long (over 100 characters) — validation error
- Invalid or unrecognized license number format — no results or error
- State parameter set to a value other than 'WA' — validation error
- Limit out of range (below 1 or above 20) — validation error
- Network or payment failure via x402 protocol — call not completed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ubi | string | The state business identifier (UBI) |
| name | string | A fragment of the business name, matched ignoring case. 2 to 100 characters. |
| limit | integer | Most licences to return. From 1 to 20. Defaults to `5`. |
| state | string | State whose contractor register is searched |
| license_number | string | The state contractor licence number, including any asterisks. 1 to 20 characters. |
Tags
x402
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