MCP server

Lexiara Official

org.lexiara/lexiara

Checked 28 Oct 2026, 09:03 UTC · Connected to it and listed its tools

Provenance-backed EU and UK legislation for AI agents, addressable to the individual provision.

Website Source

At a glance

Type

MCP server

Publisher

lexiara.org (verified by the MCP Registry)

Status

Working at last check

Tools

31

Token cost

About 9,353 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

28 Oct 2026, 09:03 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http lexiara https://lexiara.org/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.lexiara]
url = "https://lexiara.org/mcp"

Gemini CLI

{"mcpServers":{"lexiara":{"httpUrl":"https://lexiara.org/mcp"}}}

Cursor

{"mcpServers":{"lexiara":{"url":"https://lexiara.org/mcp"}}}

VS Code

{"servers":{"lexiara":{"type":"http","url":"https://lexiara.org/mcp"}}}

Antigravity

agy mcp add lexiara https://lexiara.org/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"lexiara","server_url":"https://lexiara.org/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"lexiara","server_url":"https://lexiara.org/mcp"}

Tools

• concept_family ~400 tokens
  One defined term across the whole corpus: each distinct WORDING with the publisher's own text and the instruments that write it, every instrument that borrows it (with the chain of acts it passes through), the instruments that cite a defining provision, and the term's labels in the act's other authe
• define_term ~329 tokens
  The definition of a term of art, and the provision that gives it. Ask this BEFORE search_legislation whenever the question is what a phrase means ('durable medium', 'taxable person'): search returns provisions that USE a phrase, this returns the law that DEFINES it, verbatim. A term defined by sever
• explore_role_requirements ~434 tokens
  Research source-bound EU role requirements with exact passages, act-specific definitions, conditions, unknown facts and EN/FR/DE/IT official source availability. Select multiple roles and an optional activity, product, Spain or France, and date. Country links carry their relationship type and review
• fetch ~163 tokens
  Retrieve one search result by its opaque id, including provision text, canonical URL, authority status and source provenance. metadata.structure provides parent/child addresses; an empty container text does not mean the law is absent. Use child apiHref links or lookup_provision with sourceLang to tr
• find_national_implementations ~317 tokens
  National provisions implementing one EU provision, with method and confidence per link. DERIVED data, not published by any authority: treat links not marked method='human' as leads to verify, and say so when citing. Check evidenceStatus: a current national consolidated reading aid may be informative
• follow_updates ~343 tokens
  The digest: every change the corpus observed on followed law, each with a SIGNIFICANCE grade and the reasoning behind it — 'major' (a new consolidation whose version point advanced, a provision appearing, a provision now repealed), 'minor' (wording changed, or the stored text moved while the publish
• get_coverage ~256 tokens
  Per-source coverage and freshness. Call this first when unsure whether Lexiara holds the law you need — absence of coverage means 'not here', never 'does not exist'. Pass `work` to ask about ONE instrument. The answer then says which kind of absence it is: `metadata-only` (the instrument is known a
• get_ingestion_request ~192 tokens
  State, stage, reason code and the time to wait before asking again, for one request you made. States: already_available, queued, running, available, partial, needs_clarification, needs_source_approval, failed, confirmed_unavailable. A fetch that timed out is `failed` and will be retried; `confirmed_
• get_ingestion_result ~236 tokens
  The published handles — expression id, work ELI, the /v1/works/text and /v1/provisions addresses — plus the source manifest (publisher URL, content hash, bytes, retrieval time, parser version) and the expectation results. Repeat your original lookup with the handles. Pass `expressionId` as the exact
• get_saved_role_view ~132 tokens
  Recheck current official passages and connections against a private saved view. The change list separates later publisher versions, parser corrections, newly acquired material and review status; inspect the cited current result before relying on a connection. Read-only.
• get_topic ~177 tokens
  Everything a topic page shows: the orientation paragraph (with its draft/published editorial status), per-jurisdiction legal-status notes (GB notes carry the assimilated-law caveat), anchored provisions with anchor provenance, article-level transposition links (method, confidence, review verdict — a
• guidance_for_provision ~423 tokens
  Sections of official GUIDANCE that discuss one provision — Commission notices and guidelines on the act, quoted verbatim with the section number the publisher prints, so an answer can cite '§2.8 of the UCPD Guidance' and be checked. EVERY ROW IS NON-BINDING (`binding: false`). This is the enforcin
• list_concepts ~334 tokens
  Terms of art ranked by how many instruments in this corpus DEFINE them, BORROW them from another act (followed through every intermediate act — an act that takes 'video-sharing platform' from the DSA, which takes it from the AVMSD, counts for the AVMSD's definition) or CITE a defining provision. Not
• list_follows ~153 tokens
  The instruments, provisions, subjects, jurisdictions and verticals this API key follows. READ-ONLY: creating or removing a follow is an HTTP POST/DELETE to /v1/follows, and no tool here dispatches one. (The one tool in this catalogue that writes anything is request_ingestion, which asks for a law an
• list_ingestion_requests ~120 tokens
  List up to the latest 50 ingestion requests belonging to your account, newest first. Each row includes private status fields such as `intent`, `created_at` and `origin`; another account's requests are never returned. This is read-only and does not start, repeat or alter acquisition work.
• list_review_queue ~462 tokens
  The AUTO-GATED backlog from one place, newest first: unreviewed article-level transposition links with BOTH provision texts side by side and the stored reasoning, model/low-confidence concept tags, draft topic descriptions and jurisdiction notes, and recorded findings (gaps and divergences a round c
• list_saved_role_views ~93 tokens
  List private role and country research views belonging to the connected account. Each view is a snapshot for comparison, not a compliance verdict. Read-only; saving and deleting views require a person's own HTTP account access.
• list_topics ~140 tokens
  Curated obligation topics ('Pre-contract information') under a subject head, each with a one-paragraph orientation and per-jurisdiction anchor counts. Descriptions with editorialStatus='draft' are UNREVIEWED model drafts — say so if you quote one. Feed a result's conceptId to get_topic.
• list_work_versions ~235 tokens
  Find same-language publisher expressions for one EU act. Each entry has an exact expression ID, source hash and a consolidation marker or as-adopted label. These markers identify text; they do not prove when it applied. Pass a returned expression ID to lookup_provision to read that exact text. Use a
• lookup_provision ~753 tokens
  Authoritative text of one provision, with in-force window, repealed/prospective status, concept tags, transposition edges and full provenance. `stand` says what date the served text speaks as of (`consolidated` with a date, `as-adopted`, or `unknown`) and carries the one-line `sentence` to show a re
• provision_context ~322 tokens
  The cross-reference neighbourhood of a provision plus its amendment history. Use this when a provision's relevance is not on its face: a duty that says 'the information referred to in Article 6(1)' is silent about what that information now includes, and about which amending act put it there. Returns
• provision_history ~223 tokens
  Prior and successor versions of one provision across consolidations — how the text got to its current form. Lexiara Nexus data requires an API key on a signed-in account. The free plan carries a monthly Nexus allowance; the legislative text itself is always free.
• provisions_by_concept ~189 tokens
  Cross-jurisdiction view of one legal concept: every provision tagged with the given EuroVoc concept, with tagging method and confidence. E.g. 'eurovoc:4585' (VAT), 'eurovoc:4392' (VAT rate). The language-neutral way to line up EU and national law on the same subject.
• recent_changes ~180 tokens
  Change feed: provisions added or modified, filterable by jurisdiction, concept and date. `detectedAt` is when Lexiara observed the change — legal in-force dates come only from the provision itself.
• related_works ~190 tokens
  Edges between instruments: which national laws transpose a directive (direction 'in'), or what an instrument implements/amends (direction 'out'). Instrument-level; for article-level links use find_national_implementations.
• request_ingestion ~1174 tokens
  When a lookup returns `coverage` with `requestable: true`, ask for the missing instrument instead of stopping or guessing. Give the CELEX (or an EU ELI), the language and the version point; say WHY in one or two sentences; state any testable expectations. Lexiara validates the target, fetches the pu
• search ~115 tokens
  Search Lexiara's bounded EU and UK legislation corpus. Returns compact, citable results with opaque ids; pass an id unchanged to fetch for the provision text and provenance.
• search_legislation ~174 tokens
  Ranked full-text search over provision text. Results carry work, eId, status and provenance — feed a hit's work+eId to lookup_provision for the complete payload.
• term_languages ~392 tokens
  How an act words one of its defined terms in each language version held. NOT a translation: an EU instrument is equally authentic in all 24 official languages (Regulation No 1/1958, article 4), so each wording is the law in that language. Use it to answer 'what do the German and French texts call th
• work_glossary ~378 tokens
  The act's glossary: every term it defines, alphabetical, with the publisher's own wording verbatim and the provision that defines each one. Use it to orient in an unfamiliar instrument, or to check what a term means IN THIS ACT rather than in the corpus at large — several instruments define 'consume
• work_mentions ~324 tokens
  The act-level overview: every provision of every instrument in this corpus that names the given act, grouped by citing instrument, with the article of the act each citation resolved to (`targetEId`, null where the citation is act-level — which is most of them, and is not a defect). Each instrument a

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