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Lex — Temporal Luxembourg and EU Law

by io.github.SFHAJJI
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Server Details

Temporal search and comparison for official Luxembourg and reviewed EU law, with provenance.

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Status
Unhealthy
Uptime
51.3% over 51 days
Last Tested
Transport
Streamable HTTP
URL
Repository
SFHAJJI/lex
GitHub Stars
9
Server Listing
Lex: Luxembourg Law MCP Server

TDQS

A3.6/5.0

Scored across 10 tools

Disambiguation2/5

Several tools cluster around temporal/version semantics—article_history, timeline, diff, changes_in_period, as_of, and in_force_on—with subtle boundaries. Although the descriptions specify distinct granularities, an agent could easily misselect between timeline and article_history or between as_of and in_force_on.

Naming Consistency3/5

All names are lowercase snake_case, but the set mixes bare nouns (coverage, timeline, provenance), verb phrases (search, changes_in_period), and prepositional phrases (as_of, in_force_on). There is no consistent verb_noun pattern, though the names remain readable and mostly indicative of their purpose.

Tool Count5/5

Ten tools is a well-scoped size for a specialized legal-temporal corpus. Each tool covers a distinct workflow—search, retrieval, history, diff, aggregate changes, citations, coverage, provenance—so the count feels justified rather than bloated or thin.

Completeness4/5

The surface covers the full temporal lifecycle: search, point-in-time lookup, article/document history, diff, aggregate change reporting, in-force semantics, reverse citations, coverage gaps, and provenance. A minor gap is the lack of an explicit document metadata or browse/list endpoint, but search plus as_of and timeline covers most workflows.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 6 tool updates
    • Changedarticle_history2 fields changed
      • addedInput schema / properties / from_date
        Added value: +{
+  "description": "optional ISO date: keep only the states in force at or after it",
+  "maxLength": 10,
+  "minLength": 1,
+  "pattern": "^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$",
+  "type": "string"
+}
      • addedInput schema / properties / to_date
        Added value: +{
+  "description": "optional ISO date: keep only the states that began on or before it",
+  "maxLength": 10,
+  "minLength": 1,
+  "pattern": "^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$",
+  "type": "string"
+}
    • Changedas_of3 fields changed
      • addedInput schema / allOf
        Added value: +[
+  {
+    "if": {
+      "properties": {
+        "mode": {
+          "const": "select"
+        }
+      },
+      "required": [
+        "mode"
+      ]
+    },
+    "then": {
+      "required": [
+        "anchors"
+      ]
+    }
+  }
+]
      • changedInput schema / properties / date / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
      • addedInput schema / properties / version_key
        Added value: +{
+  "description": "optional opaque key returned by timeline or an ambiguous_version choice",
+  "maxLength": 128,
+  "minLength": 1,
+  "type": "string"
+}
    • Changedchanges_in_period3 fields changed
      • changedInput schema / properties / domain / description
        Previous value: -"optional reviewed legal domain"New value: +"legacy domain filter; current v4 indexes leave it empty"
      • changedInput schema / properties / from_date / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
      • changedInput schema / properties / to_date / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
    • Changeddiff4 fields changed
      • changedInput schema / properties / from_date / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
      • addedInput schema / properties / from_version_key
        Added value: +{
+  "description": "optional opaque key returned by timeline or an ambiguous_version choice",
+  "maxLength": 128,
+  "minLength": 1,
+  "type": "string"
+}
      • changedInput schema / properties / to_date / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
      • addedInput schema / properties / to_version_key
        Added value: +{
+  "description": "optional opaque key returned by timeline or an ambiguous_version choice",
+  "maxLength": 128,
+  "minLength": 1,
+  "type": "string"
+}
    • Changedin_force_on2 fields changed
      • changedInput schema / properties / date / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
      • changedInput schema / properties / domain / description
        Previous value: -"optional reviewed legal domain"New value: +"legacy domain filter; current v4 indexes leave it empty"
    • Changedsearch4 fields changed
      • addedInput schema / allOf
        Added value: +[
+  {
+    "if": {
+      "properties": {
+        "time_scope": {
+          "const": "as_of"
+        }
+      },
+      "required": [
+        "time_scope"
+      ]
+    },
+    "then": {
+      "required": [
+        "as_of"
+      ]
+    }
+  }
+]
      • changedInput schema / properties / as_of / pattern
        Previous value: -"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"New value: +"^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$"
      • changedInput schema / properties / domain / description
        Previous value: -"optional reviewed legal domain id"New value: +"legacy domain id filter; current v4 indexes leave it empty; use publisher_metadata_identifier for official classifications"
      • addedInput schema / properties / publisher_metadata_identifier
        Added value: +{
+  "description": "optional exact official publisher-metadata URI returned by a search hit",
+  "maxLength": 2048,
+  "minLength": 1,
+  "pattern": "^https?://",
+  "type": "string"
+}
  2. 10 tool updates
    • Changedarticle_history9 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / anchor / maxLength
        Added value: +512
      • addedInput schema / properties / anchor / minLength
        Added value: +1
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / publisher
        Added value: +{
+  "description": "publisher id; required when work is not publisher-qualified",
+  "maxLength": 64,
+  "minLength": 1,
+  "type": "string"
+}
      • changedInput schema / properties / work / description
        Previous value: -"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier. Unknown document -> call search first."New value: +"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier with publisher supplied. Unknown document -> call search first."
      • addedInput schema / properties / work / maxLength
        Added value: +1000
      • addedInput schema / properties / work / minLength
        Added value: +1
    • Changedas_of15 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / anchors / maxLength
        Added value: +1000
      • addedInput schema / properties / anchors / minLength
        Added value: +1
      • addedInput schema / properties / date / maxLength
        Added value: +10
      • addedInput schema / properties / date / minLength
        Added value: +1
      • addedInput schema / properties / date / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / mode / enum
        Added value: +[
+  "full",
+  "outline",
+  "select"
+]
      • addedInput schema / properties / mode / maxLength
        Added value: +64
      • addedInput schema / properties / mode / minLength
        Added value: +1
      • addedInput schema / properties / publisher
        Added value: +{
+  "description": "publisher id; required when work is not publisher-qualified",
+  "maxLength": 64,
+  "minLength": 1,
+  "type": "string"
+}
      • changedInput schema / properties / work / description
        Previous value: -"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier. Unknown document -> call search first."New value: +"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier with publisher supplied. Unknown document -> call search first."
      • addedInput schema / properties / work / maxLength
        Added value: +1000
      • addedInput schema / properties / work / minLength
        Added value: +1
    • Changedchanges_in_period32 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / act_form / maxLength
        Added value: +1000
      • addedInput schema / properties / act_form / minLength
        Added value: +1
      • addedInput schema / properties / binding_status / maxLength
        Added value: +1000
      • addedInput schema / properties / binding_status / minLength
        Added value: +1
      • addedInput schema / properties / document_type / maxLength
        Added value: +1000
      • addedInput schema / properties / document_type / minLength
        Added value: +1
      • addedInput schema / properties / domain / maxLength
        Added value: +1000
      • addedInput schema / properties / domain / minLength
        Added value: +1
      • addedInput schema / properties / from_date / maxLength
        Added value: +10
      • addedInput schema / properties / from_date / minLength
        Added value: +1
      • addedInput schema / properties / from_date / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
      • addedInput schema / properties / hierarchy / maxLength
        Added value: +1000
      • addedInput schema / properties / hierarchy / minLength
        Added value: +1
      • addedInput schema / properties / jurisdiction / maxLength
        Added value: +64
      • addedInput schema / properties / jurisdiction / minLength
        Added value: +1
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / limit / maximum
        Added value: +100
      • addedInput schema / properties / limit / minimum
        Added value: +1
      • addedInput schema / properties / offset / maximum
        Added value: +100000
      • addedInput schema / properties / offset / minimum
        Added value: +0
      • addedInput schema / properties / order / enum
        Added value: +[
+  "by_date",
+  "by_churn"
+]
      • addedInput schema / properties / order / maxLength
        Added value: +64
      • addedInput schema / properties / order / minLength
        Added value: +1
      • addedInput schema / properties / publisher / maxLength
        Added value: +64
      • addedInput schema / properties / publisher / minLength
        Added value: +1
      • addedInput schema / properties / source_class / maxLength
        Added value: +1000
      • addedInput schema / properties / source_class / minLength
        Added value: +1
      • addedInput schema / properties / to_date / maxLength
        Added value: +10
      • addedInput schema / properties / to_date / minLength
        Added value: +1
      • addedInput schema / properties / to_date / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
    • Changedcited_by5 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / limit / maximum
        Added value: +100
      • addedInput schema / properties / limit / minimum
        Added value: +1
      • addedInput schema / properties / work / maxLength
        Added value: +1000
      • addedInput schema / properties / work / minLength
        Added value: +1
    • Changedcoverage3 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / publisher / maxLength
        Added value: +64
      • addedInput schema / properties / publisher / minLength
        Added value: +1
    • Changeddiff15 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / anchor / maxLength
        Added value: +512
      • addedInput schema / properties / anchor / minLength
        Added value: +1
      • addedInput schema / properties / from_date / maxLength
        Added value: +10
      • addedInput schema / properties / from_date / minLength
        Added value: +1
      • addedInput schema / properties / from_date / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / publisher
        Added value: +{
+  "description": "publisher id; required when work is not publisher-qualified",
+  "maxLength": 64,
+  "minLength": 1,
+  "type": "string"
+}
      • addedInput schema / properties / to_date / maxLength
        Added value: +10
      • addedInput schema / properties / to_date / minLength
        Added value: +1
      • addedInput schema / properties / to_date / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
      • changedInput schema / properties / work / description
        Previous value: -"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier. Unknown document -> call search first."New value: +"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier with publisher supplied. Unknown document -> call search first."
      • addedInput schema / properties / work / maxLength
        Added value: +1000
      • addedInput schema / properties / work / minLength
        Added value: +1
    • Changedin_force_on26 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / act_form / maxLength
        Added value: +1000
      • addedInput schema / properties / act_form / minLength
        Added value: +1
      • addedInput schema / properties / binding_status / maxLength
        Added value: +1000
      • addedInput schema / properties / binding_status / minLength
        Added value: +1
      • addedInput schema / properties / date / maxLength
        Added value: +10
      • addedInput schema / properties / date / minLength
        Added value: +1
      • addedInput schema / properties / date / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
      • addedInput schema / properties / document_type / maxLength
        Added value: +1000
      • addedInput schema / properties / document_type / minLength
        Added value: +1
      • addedInput schema / properties / domain / maxLength
        Added value: +1000
      • addedInput schema / properties / domain / minLength
        Added value: +1
      • addedInput schema / properties / hierarchy / maxLength
        Added value: +1000
      • addedInput schema / properties / hierarchy / minLength
        Added value: +1
      • addedInput schema / properties / jurisdiction / maxLength
        Added value: +64
      • addedInput schema / properties / jurisdiction / minLength
        Added value: +1
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / limit / maximum
        Added value: +100
      • addedInput schema / properties / limit / minimum
        Added value: +1
      • addedInput schema / properties / offset / maximum
        Added value: +100000
      • addedInput schema / properties / offset / minimum
        Added value: +0
      • addedInput schema / properties / publisher / maxLength
        Added value: +64
      • addedInput schema / properties / publisher / minLength
        Added value: +1
      • addedInput schema / properties / source_class / maxLength
        Added value: +1000
      • addedInput schema / properties / source_class / minLength
        Added value: +1
    • Changedprovenance5 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / lex_id / maxLength
        Added value: +1000
      • addedInput schema / properties / lex_id / minLength
        Added value: +1
    • Changedsearch35 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / act_form / maxLength
        Added value: +1000
      • addedInput schema / properties / act_form / minLength
        Added value: +1
      • addedInput schema / properties / as_of / maxLength
        Added value: +10
      • addedInput schema / properties / as_of / minLength
        Added value: +1
      • addedInput schema / properties / as_of / pattern
        Added value: +"^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
      • addedInput schema / properties / binding_status / maxLength
        Added value: +1000
      • addedInput schema / properties / binding_status / minLength
        Added value: +1
      • addedInput schema / properties / document_type / maxLength
        Added value: +1000
      • addedInput schema / properties / document_type / minLength
        Added value: +1
      • addedInput schema / properties / domain / maxLength
        Added value: +1000
      • addedInput schema / properties / domain / minLength
        Added value: +1
      • addedInput schema / properties / fuzzy / enum
        Added value: +[
+  "auto",
+  "off"
+]
      • addedInput schema / properties / fuzzy / maxLength
        Added value: +64
      • addedInput schema / properties / fuzzy / minLength
        Added value: +1
      • addedInput schema / properties / hierarchy / maxLength
        Added value: +1000
      • addedInput schema / properties / hierarchy / minLength
        Added value: +1
      • addedInput schema / properties / jurisdiction / maxLength
        Added value: +64
      • addedInput schema / properties / jurisdiction / minLength
        Added value: +1
      • addedInput schema / properties / language / maxLength
        Added value: +16
      • addedInput schema / properties / language / minLength
        Added value: +1
      • addedInput schema / properties / publisher / maxLength
        Added value: +64
      • addedInput schema / properties / publisher / minLength
        Added value: +1
      • addedInput schema / properties / query / maxLength
        Added value: +1000
      • addedInput schema / properties / query / minLength
        Added value: +1
      • addedInput schema / properties / retrieval_mode / enum
        Added value: +[
+  "keyword",
+  "hybrid"
+]
      • addedInput schema / properties / retrieval_mode / maxLength
        Added value: +64
      • addedInput schema / properties / retrieval_mode / minLength
        Added value: +1
      • addedInput schema / properties / source_class / maxLength
        Added value: +1000
      • addedInput schema / properties / source_class / minLength
        Added value: +1
      • addedInput schema / properties / time_scope / enum
        Added value: +[
+  "all_versions",
+  "as_of"
+]
      • addedInput schema / properties / time_scope / maxLength
        Added value: +64
      • addedInput schema / properties / time_scope / minLength
        Added value: +1
      • addedInput schema / properties / works / maxLength
        Added value: +1000
      • addedInput schema / properties / works / minLength
        Added value: +1
    • Changedtimeline9 fields changed
      • addedInput schema / additionalProperties
        Added value: +false
      • addedInput schema / properties / limit / maximum
        Added value: +200
      • addedInput schema / properties / limit / minimum
        Added value: +1
      • addedInput schema / properties / offset / maximum
        Added value: +100000
      • addedInput schema / properties / offset / minimum
        Added value: +0
      • addedInput schema / properties / publisher
        Added value: +{
+  "description": "publisher id; required when work is not publisher-qualified",
+  "maxLength": 64,
+  "minLength": 1,
+  "type": "string"
+}
      • changedInput schema / properties / work / description
        Previous value: -"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier. Unknown document -> call search first."New value: +"Work-level lex_id (publisher:workkey), version-level lex_id (version segment ignored), or verbatim publisher identifier with publisher supplied. Unknown document -> call search first."
      • addedInput schema / properties / work / maxLength
        Added value: +1000
      • addedInput schema / properties / work / minLength
        Added value: +1
  3. 1 tool update
    • Changeddiff1 field changed
      • addedInput schema / properties / anchor
        Added value: +{
+  "description": "optional held provision anchor returned by search, e.g. art_92",
+  "type": "string"
+}
  4. 1 tool update
    • Changedsearch3 fields changed
      • changedInput schema / properties / limit / description
        Previous value: -"default 10"New value: +"default 10; minimum 1, maximum 50"
      • addedInput schema / properties / limit / maximum
        Added value: +50
      • addedInput schema / properties / limit / minimum
        Added value: +1
  5. 1 tool update
    • Changedas_of1 field changed
      • changedInput schema / properties / anchors / description
        Previous value: -"comma-separated provision anchors for mode=select, e.g. art_1er,art_33"New value: +"optional comma-separated provision anchors for mode=outline; required for mode=select, e.g. art_1er,art_33"
  6. 3 tool updates
    • Changedchanges_in_period8 fields changed
      • addedInput schema / properties / act_form
        Added value: +{
+  "description": "optional legal act form",
+  "type": "string"
+}
      • addedInput schema / properties / binding_status
        Added value: +{
+  "description": "optional binding status",
+  "type": "string"
+}
      • changedInput schema / properties / document_type / description
        Previous value: -"optional type code(s), comma-separated; prefix with ! to exclude, e.g. !RECUEIL,!CODE_RECUEIL for instruments only"New value: +"optional source document class(es), comma-separated; prefix with ! to exclude, e.g. !RECUEIL,!CODE_RECUEIL for instruments only"
      • addedInput schema / properties / domain
        Added value: +{
+  "description": "optional reviewed legal domain",
+  "type": "string"
+}
      • addedInput schema / properties / hierarchy
        Added value: +{
+  "description": "optional normalized legal hierarchy",
+  "type": "string"
+}
      • addedInput schema / properties / jurisdiction
        Added value: +{
+  "description": "optional jurisdiction code from index metadata, e.g. LU or EU",
+  "type": "string"
+}
      • addedInput schema / properties / language
        Added value: +{
+  "description": "optional language code",
+  "type": "string"
+}
      • addedInput schema / properties / source_class
        Added value: +{
+  "description": "optional source document class; alias of document_type",
+  "type": "string"
+}
    • Changedin_force_on8 fields changed
      • addedInput schema / properties / act_form
        Added value: +{
+  "description": "optional legal act form",
+  "type": "string"
+}
      • addedInput schema / properties / binding_status
        Added value: +{
+  "description": "optional binding status",
+  "type": "string"
+}
      • changedInput schema / properties / document_type / description
        Previous value: -"optional type code, e.g. CODE"New value: +"backward-compatible source document class filter"
      • addedInput schema / properties / domain
        Added value: +{
+  "description": "optional reviewed legal domain",
+  "type": "string"
+}
      • addedInput schema / properties / hierarchy
        Added value: +{
+  "description": "optional normalized legal hierarchy",
+  "type": "string"
+}
      • addedInput schema / properties / jurisdiction
        Added value: +{
+  "description": "optional jurisdiction code from index metadata, e.g. LU or EU",
+  "type": "string"
+}
      • addedInput schema / properties / language
        Added value: +{
+  "description": "optional language code",
+  "type": "string"
+}
      • addedInput schema / properties / source_class
        Added value: +{
+  "description": "optional source document class",
+  "type": "string"
+}
    • Changedsearch1 field changed
      • changedInput schema / properties / domain / description
        Previous value: -"optional reviewed EU domain id"New value: +"optional reviewed legal domain id"
  7. 2 tool updates
    • Changedarticle_history1 field changed
      • addedInput schema / properties / language
        Added value: +{
+  "description": "optional language code; defaults to the work's primary derived language",
+  "type": "string"
+}
    • Changedsearch1 field changed
      • changedInput schema / properties / jurisdiction / description
        Previous value: -"optional lu or eu"New value: +"optional jurisdiction code from index metadata, e.g. LU or EU"
  8. 10 tool updates
    • First observedarticle_history
    • First observedas_of
    • First observedchanges_in_period
    • First observedcited_by
    • First observedcoverage
    • First observeddiff
    • First observedin_force_on
    • First observedprovenance
    • First observedsearch
    • First observedtimeline

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