kolmo-mcp-server

Parcel, zoning & overlay lookup

lookup_parcel_by_address

Read-onlyIdempotent

Address-first parcel lookup powering the /permits experience. Geocodes a Seattle-area address (King, Pierce, or Snohomish County, WA), resolves the parcel from the county GIS, and returns zoning, setbacks, overlays (shoreline / ECA / flood / historic), lot area, jurisdiction routing, and prior-permit history. Zoning, setbacks and building facts carry the city/county source they came from (geocode, lot geometry and assessor records do not). Use for "what can be built at 123 Main St Seattle?" or before calling check_permit_requirements / estimate_permit_fee for a specific parcel.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`address`	Yes	Full street address (e.g., "1234 NE 65th St, Seattle, WA 98115"). Must be in King, Pierce, or Snohomish County, WA.
`forceRefresh`	No	Skip the 30-day cache and re-fetch from county GIS + overlay sources. Default false.

Output Schema

TableJSON Schema

Name	Required	Description
`note`	Yes	Set when the county records the address on this parcel as a second address (e.g. a new house on the lot) and the assessor lists the parcel under parcel.address. Not a snap: the parcel is correct.
`found`	Yes
`parcel`	No
`warning`	Yes	Set when the address snapped to a nearby parcel. Confirm with the user before relying on the result.
`nextSteps`	Yes
`disclaimer`	Yes
`attribution`	Yes
`addressResolution`	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
```

Changed2 schema fields changedSep 23, 2026

addedOutput schema / properties / note

Added value: +{
+  "description": "Set when the county records the address on this parcel as a second address (e.g. a new house on the lot) and the assessor lists the parcel under parcel.address. Not a snap: the parcel is correct.",
+  "type": [
+    "string",
+    "null"
+  ]
+}

changedOutput schema / required

Previous value: -[
-  "found",
-  "warning",
-  "nextSteps",
-  "disclaimer",
-  "attribution"
-]New value: +[
+  "found",
+  "warning",
+  "note",
+  "nextSteps",
+  "disclaimer",
+  "attribution"
+]

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": {
+    "addressResolution": {},
+    "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"
+    },
+    "disclaimer": {
+      "type": "string"
+    },
+    "found": {
+      "const": true,
+      "type": "boolean"
+    },
+    "nextSteps": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "parcel": {},
+    "warning": {
+      "description": "Set when the address snapped to a nearby parcel. Confirm with the user before relying on the result.",
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "found",
+    "warning",
+    "nextSteps",
+    "disclaimer",
+    "attribution"
+  ],
+  "type": "object"
+}

AddedApr 30, 2026

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