ViaFrei MCP server

• Registry namede.viafrei/mcpverified in the MCP registry

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

• Stateanswerschecked 2026-10-22
• Tools22
• Server calls itselfviafrei
• Server version2.3.11
• Protocol version2025-06-18

On 2026-10-22 the server answered initialize and tools/list without a sign-in. First answer in 555 ms.

• Its tools do every use case we checked: check live traffic jams on German motorways; locate charging stations and parking spots nearby; ask an AI assistant about current road closures.

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 score85 of 100answers 100 · does the job 100 · definitions 100 · context 46 · use 0 · connects 100
• What an agent can do with it3 of 3 use cases
• Answered100% of days13 of 13 daily checks
• Median first answer550 ms
• Space in an agent's context≈ 21,965 tokensthe definitions of all its tools (23), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results0 of 23 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_autobahn_traffic

  Per motorway (≤ 5): an Ampel verdict, then jams, closures and roadworks in force now, with delay/speed. Use when asked about a named motorway now: frei/clear (Ampel), Stau, a delay, how it looks, or a LIST of closures; name every motorway…

• find_cheapest_fuel

  Returns the cheapest stations for one fuel grade near a place or coordinate: price per litre, brand, address, distance, open state. Use when the user asks where to fill up or what fuel costs. Do NOT use for charging an electric car (call…

• find_fuel_station

  Finds filling stations around a place or coordinate under any combination of filters — grade, brand, name, open now, open at a time you name, open 24 h — sorted by distance, price or name. Use when the question is WHICH station: the…

• find_parking

  Parking near a place, a coordinate or along one motorway: lorry parks, car parks, P+R and disabled-badge bays, with total spaces, stated amenities (WC, shower) and published free spaces. Use when asked where to park or leave the car for…

• check_road_status

  If a motorway, B/Land road (NI, BW, MV, SN, TH; B also SH, BY, BE; pass Land/town as place) is open/closed/restricted now/next days; by place, jams, city/Land messages, Hamburg traffic cameras; lorry limits, Lang-Lkw (vehicle). Use when…

• find_roadworks_ahead

  Returns roadworks PLANNED on one motorway, one Bundes-/Landesstraße in NI, BW, MV, SN or TH (BY: B only), or city streets by place, in a date window: section, restriction, dates. Use when a date or window is named, it says geplant, or how…

• find_charging_station

  Returns EV charging sites near a place or coordinate with operator, connector types, maximum power, price per kWh where published, and how many points are free right now where the operator publishes live status. Use when an EV driver asks…

• find_hydrogen_station

  Returns hydrogen (H2) filling stations near a place or coordinate, nearest first, with operator, address, pumps (700 bar car, 350 bar truck/bus), opening hours where published and the age of the record. Use when someone asks where to…

• find_place

  Looks up a place name and returns every match, each with its kind, population, English name and coordinate; the official key (AGS/RS) only in the structured result. Use when the person asks where somewhere is, when you need a coordinate…

• find_poi

  Finds a business or landmark by name or kind — company, shop, clinic, hotel, hostel — with address, category and coordinate. Use when the person names a THING rather than a town: "the adesso office in Dortmund", "the nearest Aldi", "a…

• find_address

  Looks up a street address: its coordinate, and the named OpenStreetMap objects at it (company, shop, office) or that none are. Use when the person gives a STREET AND NUMBER — "Bahnhofstraße 12, Fulda" — for the point or the business…

• describe_location

  Turns a coordinate into words: the nearest address, settlement and motorway junction with their distances, and the Gemeinde, Kreis and Land the point lies in; also any low-emission zone. Use when you already HAVE a lat/lon and need to say…

• find_nearby

  Overview of what is around a place or coordinate: nearby fuel stations, EV charging, parking, the nearest railway station and motorway junction, each with its distance. Use when someone asks "what is around me" or "what is near <place>"…

• find_sharing

  Returns rentable shared bikes near a place or coordinate: bike-sharing stations with bikes and free docks now, and free-floating bikes around, with distance and data age (nextbike incl. KVB Rad, MyRadl, VAG_Rad; Donkey Republic). Use when…

• get_driving_rules

  Returns the German road rules a visitor needs: low-emission zones (Umweltzone) and the Feinstaubplakette, speed limits (advisory 130), winter tyres, alcohol, the Sunday lorry ban, tolls, Rettungsgasse, what must be in the car, electric…

• check_transit_disruption

  How punctual public transport is now in one German region: the share of trips ever >5 min late, trips skipping a stop, trips cancelled, the trend and the service alerts in force there (diversions, closed stops). Use when asked whether…

• check_weather_warnings

  Returns the official DWD weather warnings in force for a place — storm, snow, ice, heavy rain, thunderstorm, heat — with Warnstufe 1–4, area, validity and the official text unaltered. At a town or coordinate it adds the DWD road-surface…

• get_train_departures

  Next trains from a German railway station: platform, delay, cancellations. Use when asked when a train, S-Bahn or ICE leaves a named station, or if a train or line from it is late ("RE1 from Köln Hbf late?"); later today ("heute Abend")…

• get_departures

  Scheduled departures from any German stop — bus, tram, U-Bahn, S-Bahn, train, ferry. Use when asked when a bus, tram, U-/Stadtbahn or ferry goes ("welche Bahnen" at a Hbf too), or for another DAY or a time over 2 h away: "Wann fährt der…

• check_station_facilities

  Whether the lifts and escalators of a railway station or Köln Stadtbahn stop work now: each one, its place, state and reason. Another tram, U-Bahn or bus stop (named with its city: "Stuttgart Charlottenplatz") gets its step-free survey…

• watch_situation

  Opens a watch so THIS conversation is told when something changes: a road closed or restricted (not a jam), a stop running late, a weather warning, a charger freeing up. Use when asked to be told later: "sag mir Bescheid, wenn die A8…

• stop_watch

  Ends a watch this conversation opened with watch_situation, so no further notifications arrive for it. Use when the person no longer needs to be told — "du musst mir nichts mehr zur A8 sagen", "stop watching that charger". No id at hand…