kolmo-mcp-server

WA contractor license status

check_contractor_license_status

Read-onlyIdempotent

Look up any Washington State contractor's license, bond, and insurance status using public L&I data (updated daily). Works for Kolmo or any competitor. Great for verifying a contractor before hiring — checks if they are licensed, bonded, and insured in WA. Search by license number, business name, UBI, or phone number. Results are ranked closest match first; when identified is false, several businesses match and none should be reported as the contractor.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`query`	Yes	Contractor license number (e.g. "KOLMOL*753JS"), business name (e.g. "Kolmo LLC"), 9-digit UBI, or phone number

Output Schema

TableJSON Schema

Name	Required	Description
`next`	No
`note`	No
`found`	Yes	false means L&I holds no matching record — a real answer, not a lookup failure.
`query`	Yes
`message`	No
`results`	No
`verifyUrl`	No
`identified`	No	true: the top results are one business. false: several businesses match, or only part of the name did — do not report any result as the contractor asked about.
`searchedBy`	No	license-number, ubi, phone, trade-name or business-name
`attribution`	No
`moreMatches`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedOct 10, 2026
- removedInput schema / $schema
```
Removed value: -"http://json-schema.org/draft-07/schema#"
```
- removedOutput schema / $schema
```
Removed value: -"http://json-schema.org/draft-07/schema#"
```
- removedOutput schema / additionalProperties
```
Removed value: -true
```
- removedOutput schema / properties / attribution / additionalProperties
```
Removed value: -true
```

Changed5 schema fields changedSep 22, 2026

changedInput schema / properties / query / description

Previous value: -"Contractor license number (e.g. \"KOLMOL*753JS\") or business name (e.g. \"Kolmo Construction\")"New value: +"Contractor license number (e.g. \"KOLMOL*753JS\"), business name (e.g. \"Kolmo LLC\"), 9-digit UBI, or phone number"

addedOutput schema / properties / identified

Added value: +{
+  "description": "true: the top results are one business. false: several businesses match, or only part of the name did — do not report any result as the contractor asked about.",
+  "type": "boolean"
+}

addedOutput schema / properties / moreMatches
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / note
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / searchedBy

Added value: +{
+  "description": "license-number, ubi, phone, trade-name or business-name",
+  "type": "string"
+}

Changed6 schema fields changedSep 3, 2026
- removedOutput schema / properties / attribution / properties / contractorLicense
```
Removed value: -{
-  "type": "string"
-}
```
- removedOutput schema / properties / attribution / properties / note
```
Removed value: -{
-  "type": "string"
-}
```
- removedOutput schema / properties / attribution / properties / organization
```
Removed value: -{
-  "type": "string"
-}
```
- removedOutput schema / properties / attribution / properties / retrievedFrom
```
Removed value: -{
-  "type": "string"
-}
```
- removedOutput schema / properties / attribution / properties / url
```
Removed value: -{
-  "type": "string"
-}
```
- changedOutput schema / properties / attribution / required
```
Previous value: -[
-  "organization",
-  "contractorLicense",
-  "url",
-  "sourceUrl",
-  "citeAs",
-  "retrievedFrom",
-  "note"
-]New value: +[
+  "sourceUrl",
+  "citeAs"
+]
```

Changed1 schema field changedAug 31, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": true,
+  "properties": {
+    "attribution": {
+      "additionalProperties": true,
+      "properties": {
+        "citeAs": {
+          "description": "Ready-made citation line. Use verbatim.",
+          "type": "string"
+        },
+        "contractorLicense": {
+          "type": "string"
+        },
+        "note": {
+          "type": "string"
+        },
+        "organization": {
+          "type": "string"
+        },
+        "primarySource": {
+          "description": "Present when Kolmo verified but does not author the fact — cite both.",
+          "type": "string"
+        },
+        "retrievedFrom": {
+          "type": "string"
+        },
+        "sourceUrl": {
+          "description": "The specific page these facts render on. Link this, not the site root.",
+          "type": "string"
+        },
+        "url": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "organization",
+        "contractorLicense",
+        "url",
+        "sourceUrl",
+        "citeAs",
+        "retrievedFrom",
+        "note"
+      ],
+      "type": "object"
+    },
+    "found": {
+      "description": "false means L&I holds no matching record — a real answer, not a lookup failure.",
+      "type": "boolean"
+    },
+    "message": {
+      "type": "string"
+    },
+    "next": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "query": {
+      "type": "string"
+    },
+    "results": {},
+    "verifyUrl": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "found",
+    "query"
+  ],
+  "type": "object"
+}

First observedApr 14, 2026

TDQS

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