Verify a Washington contractor license

160,823 licenses from the official WA source, normalized to one schema — check status, expiry and classification in one call. full roster.

160,823

licenses covered

84,812

currently active

2026-06-19

data as of

Seattle

top city

Source: https://data.wa.gov/Labor/L-I-Contractor-License-Data-General/m8qx-ubtq. Every record carries this source_url and the as_of date above.

Verify a license

Pre-scoped to Washington (WA). Type a business or principal name.

Searches the live dataset by business or principal name (straight from /v1/search — nothing here is mocked). A non-match returns an honest empty result.

Name contains

State

Status

License status

How the 160,823 covered WA records break down by normalized status.

Status	Records	Share
active	84,812	52.7%
suspended	9,612	6.0%
expired	61,420	38.2%
inactive	134	0.1%
other	4,845	3.0%

Top classifications

The most common license types / trade classifications in coverage.

Classification	Records
CONSTRUCTION CONTRACTOR	148,569
ELECTRICAL CONTRACTOR	9,161
PLUMBING CONTRACTOR	2,971
ELEVATOR CONTRACTOR	122

Where Washington contractors are based

Top cities by number of covered licenses.

City	Licenses
Seattle	8,229
Vancouver	6,504
Spokane	6,208
Tacoma	5,141
Everett	3,899
Kent	3,300
Auburn	3,217
Renton	2,755
Puyallup	2,573
Olympia	2,539
Lynnwood	2,351
Federal Way	2,332
Bellingham	2,292
Portland	2,179
Bellevue	2,155

How to verify a Washington contractor

By license number (the exact check)

curl "https://license-verify.pages.dev/v1/lookup?state=WA&license=<number>"

Returns the matching record with status, expiry and classification, or an honest found:false.

By company name

curl "https://license-verify.pages.dev/v1/search?q=<name>&state=WA&status=active"

For an AI agent (MCP)

Call lookup_license / search_licenses at /v1/mcp with state="WA" — no glue code.