Fifteen jurisdictions of legal research behind one MCP endpoint.

Türkiye - Netherlands - Poland - Austria - Ireland - Finland - Spain - United Kingdom - European Union - Japan - Azerbaijan - Germany - legal scholarship - signed resource contracts - GLEIF entity identity.

104 tools, one hosted endpoint, no authentication:

https://arthurlegal-mcp.fly.dev/mcp

Anyone with the URL can call every tool. Self-hosting? Deploy your own copy (see Indexes) and use https://<your-app>.fly.dev/mcp instead.

This is the endpoint the ArthurLegal assistant packages use. You can also connect it to any MCP client on its own (Streamable HTTP transport).

Claude (claude.ai or Claude Desktop): Settings -> Connectors -> Add custom connector. Name: ArthurLegal MCP, URL: https://arthurlegal-mcp.fly.dev/mcp. Leave the OAuth fields empty.

Claude Code:

claude mcp add --transport http arthurlegal https://arthurlegal-mcp.fly.dev/mcp

Clients that take a JSON config with remote servers (Cursor, VS Code and others):

{ "mcpServers": { "arthurlegal": { "url": "https://arthurlegal-mcp.fly.dev/mcp" } } }

Clients that only launch local (stdio) servers: bridge with npx -y mcp-remote https://arthurlegal-mcp.fly.dev/mcp as the command.

Check it is up:

curl -s -X POST https://arthurlegal-mcp.fly.dev/mcp       -H 'Content-Type: application/json' -H 'Accept: application/json, text/event-stream'       -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"check","version":"1"}}}'

Then call the status tool from your client to see which jurisdictions are loaded.

The hosted endpoint is provided as is, without an uptime guarantee. Your search queries reach this server and the official upstream sources it queries, and are sent to the embeddings provider when semantic search runs. Do not put client names or other confidential facts into queries; mask documents locally first (for example with Arthur Mask).

Türkiye (tr_) is the largest backend: Yargıtay/Danıştay/BAM case law, AYM, Uyuşmazlık, all legislation types, Resmî Gazete, and eight regulators (EPDK, Rekabet, SPK, BDDK, KVKK, BTK, GİB, Sigorta Tahkim) behind one tr_kurum_karari_ara interface, plus a locally indexed archive for tr_semantik_ara. Source: the ArthurLegalTR/ folder.

tr_resmi_gazete_tara, tr_resmi_gazete_fihrist and tr_mevzuat_ara also take a konu filter (enerji, rekabet, vergi, icra): a local, network-free topic triage over titles that finds items whose titles never mention the topic (in the labelled gazette corpus the topic word appears in only 10% of icra items). In legislation it also reads the names of the laws an omnibus act amends -- "Bazi Kanunlarda Degisiklik Yapilmasina Dair Kanun" says nothing, Law 7531 amends the Enforcement and Bankruptcy Code -- and an omnibus act whose names cannot be read is never dropped. It is a pre-filter, not a guarantee, and it was measured separately per source: gazette out-of-fold sensitivity 92-100% per topic; on 60 unseen legislation titles vergi 4/4, icra 2/2, enerji 0/3. Every response says how many items it dropped, esik=0 disables it, and status reports the model and both measurements. Do not use it for publication verification.

tkgm_ tools work on a parcel file the user downloads themselves from TKGM's Parsel Sorgu (GeoJSON/KML): plane-projected area and edge lengths, a to-scale A4 SVG sketch, an OSM map, format conversion (DXF/KML/CSV), route-corridor intersection, 2026 title-deed fee and revolving-fund tariff lookups (every figure stored with a verbatim source quote), and a bridge from the parcel to the statutes and case law to check with the tr_ tools. This server never calls TKGM: Parsel Sorgu's terms of use forbid direct or indirect access to its web services (art. 3) and commercial use of its output (art. 4). Parsel Sorgu exports vertices rounded to 5 decimals (~1.1 m), so the tools report the resulting area uncertainty instead of presenting a rounding artefact as a cadastral discrepancy. On this hosted endpoint file paths are refused (parcel text is passed in icerik) and the tools that write files, fetch elevation data or read title records are disabled; run tkgm-mcp/server.py locally over stdio for those. Source: the tkgm-mcp/ folder.

Every tool carries its jurisdiction as a prefix -- nl_ pl_ at_ ie_ fi_ es_ uk_ eu_ jp_ gleif_ az_ de_ scholar_ contracts_. Across the underlying servers get_act means five different things and search_legislation three, so the prefix is what keeps a Spanish question from being answered with Finnish law.

status reports every jurisdiction at once: which backends loaded, how many documents each has indexed, how many are vectorised, and whether semantic search is live. A backend that fails to load is announced there rather than quietly returning nothing -- "no results" and "not searched" are different answers.

Five jurisdictions are searched from a local SQLite index (FTS5 + vectors); the rest are queried upstream and reranked in memory. The indexes are built on a workstation and baked into the image at baked/<jurisdiction>.db:

python crawl.py --embed          # in each jurisdiction directory
python build_bundle.py --target fly --out fly-app
flyctl deploy

Crawling is a maintenance task, not something a booting container does. Baking the databases in means a machine is never healthy-but-empty, and the corpus can never drift away from the code that was tested against it. start.sh still falls back to crawling when no baked index is present, and says which it used: indexes present: N/5.

A document holds exactly one vector (vecs.doc_id is the primary key), so changing EMBEDDINGS_MODEL does not add a second vector -- the next embedding run overwrites the old one. Until it does, queries find no vectors for the new model and semantic search reports itself off. That is deliberate: bge-m3 and voyage-4-lite are both 1024-dimensional, so mixing them would raise nothing and rank by distances computed across two unrelated vector spaces.

Without a key the server still answers, on BM25 and fuzzy matching, and every response says semantic: "off" rather than passing a keyword match off as a conceptual one.

Source: github.com/beerbottle90/arthurlegal-mcp