LegalOne MCP server

• Registry namefr.legalone/entreprisesverified in the MCP registry

The registry name sits under legalone.fr. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-30
• Tools11
• Server calls itselfLegalOne
• Server version0.1.0
• Protocol version2025-06-18

On 2026-10-30 the server answered initialize and tools/list without a sign-in. First answer in 688 ms.

• Its tools do prepare a legal notice for a company formality, but not send clients a secure payment link for a notice; track invoices and publication certificates per client file.
• Checked on 4 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 4 so far
• What an agent can do with it1 of 3 use cases
• Answeredmeasuring4 of the 7 daily checks it takes to print a share
• Median first answer733 ms
• Space in an agent's context≈ 3,799 tokensthe definitions of all its tools (11), which an agent carries on every turn
• Tool definitionsA · 94 of 100
• Typed results0 of 11 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 4 of 11

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• search_companies

  Use this when the user names a French company (or gives a SIREN or SIRET) and you need to identify it: returns up to 20 matches with name, SIREN, status, legal form code, NAF code and head-office city. Name matching is a prefix match on…

• get_company

  Use this when you know a company's SIREN and the user wants its official identity, or wants to pre-fill a business customer's onboarding form: name, active or ceased, legal form code, NAF code, creation date, head office, establishments…

• get_establishment

  Use this when the user gives a SIRET (14 digits) and wants that establishment's address, activity code, status and whether it is the head office. Do not use to find all establishments of a company; get_company lists them.

• list_bodacc_notices

  Use this when the user asks what was officially published about a company (registration, changes, sale of business, insolvency proceedings, removal) and you know its SIREN: returns the latest BODACC notices, newest first, with links to…

• get_bodacc_notice

  Use this when you have a BODACC notice identifier (for example from list_bodacc_notices) and need its detailed content. Personal details such as birth dates and home addresses are never included. Do not use to look for notices without an…

• list_company_documents

  Use this when the user wants to know which deeds or annual-accounts filings a company has registered (title and dates), with a link to download them from the INPI. Do not use to read financial figures; the documents themselves are not…

• search_addresses

  Use this when the user gives a French postal address, complete or partial, and wants it checked, completed, normalized or geolocated: returns the best Base Adresse Nationale matches with house number, street, postcode, city, INSEE…

• get_legal_notice_price

  Use this when the user asks how much a legal notice (annonce légale) costs for a formality in a French department: returns the exact regulated price excluding and including VAT, set by ministerial order and identical in every authorised…

• which_legal_notice

  Use this when a French company or its adviser describes a corporate event (creation, registered office transfer within or outside the department, change of manager or president, name, corporate purpose, share capital, legal form…

• get_next_steps

  Use this when the user has published, or is about to publish, a legal notice and asks what comes next: the filing on the one-stop shop for business formalities (guichet unique, INPI), deadlines, what the court registry does (BODACC) and…

• prepare_legal_notice

  Use this when the user wants LegalOne to prepare their legal notice for an existing company (registered office transfer, change of manager or president, name, corporate purpose, share capital, duration, early dissolution, liquidation…