Lexiara MCP server

Provenance-backed EU and UK legislation, addressable to the individual provision, for AI agents. Every answer carries the official source, the retrieval date and the licence. 25 tools, all read-only.

Claude, ChatGPT, or any client that speaks OAuth

Add this address as a custom connector:

https://lexiara.org/mcp

You will be asked to sign in and approve the connection. The application reads as you, against your own allowance, and you can disconnect it at any time from your account. It can read and only read.

Claude Code

claude mcp add --transport http lexiara https://lexiara.org/mcp \
  --header "Authorization: Bearer YOUR_API_KEY"

Anything else

Streamable HTTP, stateless: one JSON-RPC message per POST. initialize and tools/list need no credential, so a client can read the catalogue before deciding. A keyless tools/call answers 401 with a WWW-Authenticate header pointing at the discovery document.

The tools

`search`	Search Lexiara legislation
`fetch`	Fetch a Lexiara provision
`lookup_provision`	Look up a provision's text
`search_legislation`	Full-text search across the corpus
`provision_context`	What a provision cites, and what changed it
`define_term`	Where the law defines a phrase
`work_glossary`	Every term an instrument defines
`term_languages`	The same defined term in the act's other authentic languages
`provisions_by_concept`	Provisions tagged with a concept
`related_works`	Instrument-level relationships
`work_mentions`	Who names this act, provision by provision
`provision_history`	A provision's version history
`find_national_implementations`	Article-level national implementations
`guidance_for_provision`	Guidance on one provision
`list_topics`	Curated topics under a subject
`get_topic`	One topic: orientation, notes, anchored provisions, links
`recent_changes`	What changed in the corpus
`list_review_queue`	What is waiting for a human verdict
`list_follows`	The law this key follows
`follow_updates`	Graded developments in the law you follow
`get_coverage`	What the corpus contains, and how fresh
`request_ingestion`	Ask Lexiara to acquire a missing law
`list_ingestion_requests`	Your ingestion request history
`get_ingestion_request`	How an ingestion request is going
`get_ingestion_result`	What an ingestion request produced

The legislative text is free on every plan. The Lexiara Nexus — article-level transposition links, cross-references, version history — carries a monthly allowance, because it is our own work rather than the publishers'.

What an answer is worth

Text is reproduced from the cited official source and carries an authoritative flag. Links between provisions are derived and carry a method and a confidence: anything not marked method='human' is evidence, not a finding. An agent quoting Lexiara should carry that distinction through.

Lexiara provides legal information, not legal advice. Operated by Taliara Limited (England & Wales, no. 17228820). Terms · Privacy