FreightUtils MCP Server

HS Code Lookup

hs_code_lookup

Read-onlyIdempotent

Search 6,940 WCO Harmonized System (HS 2022) commodity codes — the 6-digit international customs classification layer. The first 2 digits are the chapter, 4 the heading, 6 the subheading.

Provide ONE of: query (free-text description search, min 2 chars), code (2-6 digit lookup, written with or without dots or spaces — "8471.30" is 847130 — returns the code plus its hierarchy), or section (Roman numeral I-XXI to browse a section).

Behavior: read-only; description search runs first against the HS 2022 descriptions (UN Comtrade H6); when none contains the words, it falls back to the UK Trade Tariff search references (HMRC's index of everyday goods names), so "laptop" finds 847130 and "computers" finds heading 8471. A fallback match is medium confidence: matched_via names HMRC's index, the citation asks you to confirm the code, and the formal tariff wording ("automatic data processing machines") stays the surest search. count 0 with an empty results[] is still a valid answer when neither finds the words. Rate-limited: a limit error carries reset_at, the UTC time the allowance resets.

Returns: the query/code echo, count and results[] (hscode, description and hierarchy context) under result, plus confidence, _source and citation (the FreightUtils v1 response envelope).

Limitations: the 6-digit international level only — national tariff lines (8-10 digits) and duty rates are set per country; classification here is indicative, not a binding ruling.

Related: uk_duty_calculator (duty/VAT for a code found here), ics2_check (EU ENS goods-description quality — a different check entirely).

Input Schema

TableJSON Schema

Name	Required	Description
`code`	No	Exact HS code: 2–6 digits, written with or without dots or spaces (e.g. "847130", "8471.30", "0901").
`query`	No	Search by product description (min 2 chars)
`section`	No	Browse by section (Roman numeral I–XXI)

Output Schema

TableJSON Schema

Name	Required	Description	Default
`ok`	Yes
`result`	Yes
`_source`	Yes
`citation`	Yes
`validity`	No
`warnings`	No
`confidence`	Yes
`blocking_errors`	No
`envelope_version`	Yes
`normalized_input`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 8, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```

Changed2 schema fields changedOct 8, 2026

changedInput schema / properties / code / description

Previous value: -"Exact HS code (2-6 digits)"New value: +"Exact HS code: 2–6 digits, written with or without dots or spaces (e.g. \"847130\", \"8471.30\", \"0901\")."

removedInput schema / properties / code / pattern
```
Removed value: -"^\\d{2,6}$"
```

Changed5 schema fields changedAug 11, 2026
- addedOutput schema / properties / _source / properties / authority_current_edition
```
Added value: +{
+  "type": "string"
+}
```
- addedOutput schema / properties / _source / properties / checked_at
```
Added value: +{
+  "type": "string"
+}
```
- addedOutput schema / properties / _source / properties / dataset_edition
```
Added value: +{
+  "type": "string"
+}
```
- removedOutput schema / properties / envelope_version / const
```
Removed value: -"1"
```
- addedOutput schema / properties / envelope_version / enum
```
Added value: +[
+  "1",
+  "1.1"
+]
```

Changed1 schema field changedJul 9, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "_source": {
+      "additionalProperties": false,
+      "properties": {
+        "checked": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        },
+        "provenance_status": {
+          "enum": [
+            "verified",
+            "pending-verification",
+            "computed",
+            "live"
+          ],
+          "type": "string"
+        },
+        "source_url": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "name",
+        "checked",
+        "provenance_status"
+      ],
+      "type": "object"
+    },
+    "blocking_errors": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "recovery": {
+            "additionalProperties": false,
+            "properties": {
+              "action": {
+                "type": "string"
+              },
+              "params": {
+                "additionalProperties": {},
+                "propertyNames": {
+                  "type": "string"
+                },
+                "type": "object"
+              },
+              "tool": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "action"
+            ],
+            "type": "object"
+          }
+        },
+        "required": [
+          "code",
+          "message",
+          "recovery"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "citation": {
+      "additionalProperties": false,
+      "properties": {
+        "qualifier": {
+          "type": "string"
+        },
+        "text": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "text"
+      ],
+      "type": "object"
+    },
+    "confidence": {
+      "additionalProperties": false,
+      "properties": {
+        "basis": {
+          "enum": [
+            "deterministic",
+            "provenance",
+            "match_quality",
+            "freshness"
+          ],
+          "type": "string"
+        },
+        "level": {
+          "enum": [
+            "high",
+            "medium",
+            "low"
+          ],
+          "type": "string"
+        },
+        "score": {
+          "maximum": 1,
+          "minimum": 0,
+          "type": "number"
+        }
+      },
+      "required": [
+        "level",
+        "basis"
+      ],
+      "type": "object"
+    },
+    "envelope_version": {
+      "const": "1",
+      "type": "string"
+    },
+    "normalized_input": {
+      "additionalProperties": {},
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "ok": {
+      "type": "boolean"
+    },
+    "result": {
+      "additionalProperties": {},
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "validity": {
+      "additionalProperties": false,
+      "properties": {
+        "as_of": {
+          "type": "string"
+        },
+        "effective_from": {
+          "type": "string"
+        },
+        "effective_to": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "as_of"
+      ],
+      "type": "object"
+    },
+    "warnings": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "details": {
+            "additionalProperties": {},
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          },
+          "message": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "envelope_version",
+    "ok",
+    "result",
+    "confidence",
+    "_source",
+    "citation"
+  ],
+  "type": "object"
+}

Changed5 schema fields changedJun 19, 2026

addedInput schema / properties / code / pattern
```
Added value: +"^\\d{2,6}$"
```

changedInput schema / properties / query / description

Previous value: -"Search by product description"New value: +"Search by product description (min 2 chars)"

addedInput schema / properties / query / minLength
```
Added value: +2
```

changedInput schema / properties / section / description

Previous value: -"Browse by section (Roman numeral)"New value: +"Browse by section (Roman numeral I–XXI)"

addedInput schema / properties / section / pattern
```
Added value: +"^[ivxIVX]{1,5}$"
```

First observedApr 23, 2026

TDQS

Score is being calculated.

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