Jetopolis MCP server

• Registry nameapp.jetopolis/gameverified in the MCP registry

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

• Stateanswerschecked 2026-10-24
• Tools7
• Server calls itselfjetopolis
• Server version082afdc
• Protocol version2025-06-18

On 2026-10-24 the server answered initialize and tools/list without a sign-in. First answer in 59 ms.

• Its tools do none of the product's use cases we checked: Build and run an airline hub across eras from 1950 to 2030; Trade routes and sell seats with other players' airlines.
• Checked on 5 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: 5 so far
• What an agent can do with it0 of 2 use cases
• Answeredmeasuring5 of the 7 daily checks it takes to print a share
• Median first answer638 ms
• Space in an agent's context≈ 1,519 tokensthe definitions of all its tools (7), which an agent carries on every turn
• Tool definitionsA · 90 of 100
• Typed results7 of 7 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 4 of 7

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 →

• list_worlds

  Public Jetopolis worlds open right now: name, server region, pace (Standard: 1 game day = 20 real minutes, Blitz: 5), start and end year, current game date and era, players and seats, players active in the last 24 hours, and a link to…

• get_world

  One Jetopolis world by id: the same card as in list_worlds plus finishedAt for a world that has ended.

• world_standings

  Player airlines of a world ranked by rating: airline name and two-letter code, home base, rating, aircraft in service, open routes, founding date, status and a link to the public airline card. Updated once per game day of that world…

• historical_airlines

  Real airlines that operated in a given year (1950-2030) as the game knows them: name, IATA code when reliably known, home country and region, type, years of operation, and the countries each one served that year. Network data has decade…

• aircraft_catalog

  Aircraft types of the game catalog: seats in two classes, range, cruise speed, required runway, entry into service and end of production, and the list price in millions of US dollars of the entry-into-service year. With year, only types…

• aircraft_price

  In-game catalogue price of a new aircraft in a given year: the entry-into-service price inflated by US CPI to nominal dollars of that year, and the same price in 2024 dollars. Accepts an id from aircraft_catalog or part of the name; when…

• how_to_start

  How to start playing Jetopolis: the steps from the first click to the first route, the world pace and links to the game and its guides. English or Russian.