Lettance MCP server

• Registry namecom.lettance/rulesverified in the MCP registry

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

• Stateanswerschecked 2026-10-27
• Tools7
• Server calls itselfLettance
• Server version1.4.0
• Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 197 ms.

• Its tools do Track gas safety and electrical certificate renewal dates, but not Send certificate copies to tenants with a dated record; Track rent payments and arrears on each home.

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 score81 of 100answers 100 · does the job 33 · definitions 100 · context 100 · connects 100
• What an agent can do with it1 of 3 use cases
• Answered100% of days7 of 7 daily checks
• Median first answer242 ms
• Space in an agent's context≈ 2,042 tokensthe definitions of all its tools (7), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once

• Every tool passes all six checks.

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 →

• check_address

  Use when someone asks what applies to a rented home at a postcode in England. Returns whether a council property licence is needed for the household type, the council's licensing schemes, the planned landlord register window, flood zone…

• search_rules

  Use for general questions about what private landlords in England must do, such as gas safety, deposits, EPC ratings, smoke alarms or notices. Searches Lettance's catalogue of rules, each cited to legislation.gov.uk or GOV.UK, and returns…

• get_rule

  Use when you have a rule id from search_rules and need its full detail: the requirement, deadline, evidence to keep, penalty, legal basis and official guidance links. Read-only. Unknown ids return an error rather than a guess.

• council_licensing

  Use when someone asks about a council's licensing schemes in England. Returns every scheme for the council with its wards, dates, fees and council sources. Pass a slug such as 'southwark' or a name such as 'Birmingham'. Read-only. A…

• plan_rental

  Use when a landlord in England asks what is due for a rented home and when, or wants a plan or calendar for it. Give the postcode and whatever the landlord knows: every other argument is optional. Returns each duty with its status, date…

• compare_addresses

  Use when someone wants to compare 2 to 4 rented homes or areas in England by postcode. Returns each postcode's check_address answer and area market figures, plus a side-by-side table of licence need, landlord register window, flood zone…

• area_market

  Use when someone asks about typical rents or house prices around a postcode in England. Returns the ONS average monthly private rent for the local authority (with bedroom breakdown and annual change) and the HM Land Registry median sale…

• com.lettance/accountanswers, requires sign-inverified in the MCP registry