# Washington State Contractor License Lookup

> 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.

## Facts

- Endpoint: POST https://win.oneshotagent.com/v1/tools/lookup/company-contractor-license?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/washington-state-contractor-license-lookup-eeff89d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Crg1BYXkvbhUlrl-tRcEc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability washington-state-contractor-license-lookup-eeff89d7 -d '<json body>'
```

Example prompt: Can you check if 'Pacific Northwest Builders LLC' is a licensed contractor in Washington State and tell me their license status, type, and when it expires?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ubi": {
   "type": "string",
   "description": "The state business identifier (UBI)"
  },
  "name": {
   "type": "string",
   "description": "A fragment of the business name, matched ignoring case. 2 to 100 characters."
  },
  "limit": {
   "type": "integer",
   "description": "Most licences to return. From 1 to 20. Defaults to `5`."
  },
  "state": {
   "enum": [
    "WA"
   ],
   "type": "string",
   "description": "State whose contractor register is searched"
  },
  "license_number": {
   "type": "string",
   "description": "The state contractor licence number, including any asterisks. 1 to 20 characters."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/washington-state-contractor-license-lookup-eeff89d7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from win.oneshotagent.com](https://www.zero.xyz/host/win.oneshotagent.com/llms.txt)