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ViaFrei

by viafrei.de · remote · no sign-in to list tools · v2.3.5 · published by de.viafrei

German open mobility data: Autobahn traffic, trains, transit, fuel, charging, parking, weather.

Changes · 5

22 tools: 5 change things and 17 only read.

Scanned Oct 21, 2026

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http viafrei https://mcp.viafrei.de/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • The description contains "any other tool", wording about other tools or servers.

    Matched text

    description: "...el in Weimar". The coordinate passes to any other tool as lat/lon. Do NOT use for a town, dist..."

    What this check looks for
  • The description contains "any other tool", wording about other tools or servers.

    Matched text

    description: "...o lives there. The coordinate passes to any other tool as lat/lon. Do NOT use for a town/distr..."

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

22 tools

Changes things 5Claude Code: ask
  • check_autobahn_trafficPer motorway (≤ 5): an Ampel verdict, then jams, closures and roadworks in force now, with delay/speed.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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 (Munich→Berlin: A9). Do NOT use for open/closed/gesperrt/passable, even now, a closure with no time word or a later one (tonight, weekend), or a town, no motorway — check_road_status; Baustellen dated or geplant — find_roadworks_ahead; a named city street: not held; fuel (find_cheapest_fuel), trains (get_train_departures). ~5 min old. Show attribution.

    Annotations the server declares

    • title: Autobahn traffic
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • check_station_facilitiesWhether the lifts and escalators of a railway station or Köln Stadtbahn stop work now: each one, its place, state and reason.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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 where one exists. Use when asked about step-free access, broken lifts, wheelchair or pram: "Funktioniert der Aufzug am Kölner Hbf?", "is the lift at Hamburg Hbf working?". Do NOT use for departures, platforms or delays — call get_train_departures (trains) or get_departures (bus, tram, U-Bahn). At most 50, broken first. Results carry their attribution line.

    Annotations the server declares

    • title: Station lifts and escalators
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true
    • destructiveHint: false
  • check_transit_disruptionHow 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 th…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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 buses and trains run normally, or a strike, storm or works disrupt them. Do NOT use for a station's departures or a line from a named DEPARTURE station ("RE1 ab Köln Hbf verspätet?"; a destination, "nach …"/"zum …", is not one) — get_train_departures. No per-line figures. Window ≤ 120 min. CC BY-SA (DELFI) or CC BY 4.0 (VBB, Berlin/Brandenburg): show attribution.

    Annotations the server declares

    • title: Public-transport disruption in a region
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • stop_watchEnds a watch this conversation opened with watch_situation, so no further notifications arrive for it.No findings

    Why it is in this group

    • The name "stop_watch" says "stop": a word for a change.
    Description, as the server wrote it
    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: pass kind ("weather") and key in the person's words ("A8", "Bamberg", "Kiel"); one match is stopped, several are listed. Do NOT use to look a situation up (call check_road_status), to list what is running (read viafrei://watches), or to cancel anything outside this chat. Another session's watch is never found. Results carry their attribution line.

    Annotations the server declares

    • title: Stop a watch
    • readOnlyHint: false
    • idempotentHint: false
    • openWorldHint: false
    • destructiveHint: false
  • watch_situationOpens 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.No findings

    Why it is in this group

    • The description's first verb is "open": a word for a change.
    Description, as the server wrote it
    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 wieder frei ist", "tell me when a warning comes for Kiel". A name is enough as the key; no lookup first. Do NOT use to look up now, nor for e-mail, SMS or alerts outside this chat — we cannot send one; say so. Set hours (≤ 24, default 3) for the time asked; condition narrows it (only the reopening, one charge point). Session-scoped, ≤ 10 watches. Show attribution.

    Annotations the server declares

    • title: Watch for a change
    • readOnlyHint: false
    • idempotentHint: false
    • openWorldHint: false
    • destructiveHint: false
Only reads 17Claude Code: allow
  • check_road_statusIf 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 tra…No findings

    Why it is in this group

    • The name "check_road_status" says "status": a word for reading.
    Description, as the server wrote it
    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 asked if a road is open/closed/gesperrt/passable, even now — "A8 in diesem Moment gesperrt?" — closures tonight/weekend, or Stau in a town (Köln). Do NOT use for a named motorway frei/clear (Ampel) or its jams/delays — check_autobahn_traffic; dated roadworks — find_roadworks_ahead; a named city street: not held, no call. ≤ 14 days/11 entries. Show attribution.

    Annotations the server declares

    • title: Road status and closures
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • check_weather_warningsReturns 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 unalter…No findings

    Why it is in this group

    • The description's first verb is "return": a word for reading.
    Description, as the server wrote it
    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 forecast (Straßenwetter-Prognose: dry to black ice, road temperature) for the nearest road-weather stations. Use when asked about weather on a trip, safe driving, storm or snow warnings, or icy roads (Glätte, Glatteis). Do NOT use for a general forecast (not offered) or jams (check_autobahn_traffic). Show the attribution line.

    Annotations the server declares

    • title: Weather warnings and road-surface forecast
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true
    • destructiveHint: false
  • describe_locationTurns 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…No findings

    Why it is in this group

    • The name "describe_location" says "describe": a word for reading.
    Description, as the server wrote it
    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 where that is. Do NOT use to look up a place or address BY NAME — that is find_place, find_poi or find_address; this only goes coordinate to words. Those come from the municipality the point lies in (its key), not the nearest Kreis point; near the border the answer says so. OpenStreetMap ODbL 1.0 for the address; show the attribution line.

    Annotations the server declares

    • title: Describe a coordinate
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_addressLooks up a street address: its coordinate, and the named OpenStreetMap objects at it (company, shop, office) or that none are.1 finding

    Why it is in this group

    • The name "find_address" says "find": a word for reading.

    Findings

    • Warn

      The description contains "any other tool", wording about other tools or servers.

      Matched text

      description: "...o lives there. The coordinate passes to any other tool as lat/lon. Do NOT use for a town/distr..."

      What this check looks for
    Description, as the server wrote it
    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 there, never who lives there. The coordinate passes to any other tool as lat/lon. Do NOT use for a town/district/station name alone (find_place) or a company/shop/landmark by name (find_poi). At most 5 points; a door mapped twice is folded, points far apart say how far; several towns are a question. OpenStreetMap ODbL 1.0; show the attribution line.

    Annotations the server declares

    • title: Look up a street address
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_charging_stationReturns 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 …No findings

    Why it is in this group

    • The name "find_charging_station" says "find": a word for reading.
    Description, as the server wrote it
    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 where to charge ("Wo kann ich laden?", "CCS 150 kW near Leipzig", "ist gerade eine Säule frei?"). Do NOT use for petrol or diesel — call find_cheapest_fuel; for E-Kennzeichen or Ladekarte rules — call get_driving_rules. Radius ≤ 25 km, ≤ 10 sites; availability is missing for most operators and is then unknown, never free. Show the attribution line.

    Annotations the server declares

    • title: EV charging nearby
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_cheapest_fuelReturns the cheapest stations for one fuel grade near a place or coordinate: price per litre, brand, address, distance, open state.No findings

    Why it is in this group

    • The name "find_cheapest_fuel" says "find": a word for reading.
    Description, as the server wrote it
    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_charging_station), price history, or traffic (call check_autobahn_traffic). Radius ≤ 25 km, at most 10 stations. For a brand, a name, open now or at a named time, or nearest-first, call find_fuel_station. Each line names the age of its price and opening-hours claim. Prices are consumer information only; the attribution line and MTS-K note must be shown.

    Annotations the server declares

    • title: Cheapest fuel nearby
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true
    • destructiveHint: false
  • find_fuel_stationFinds 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 …No findings

    Why it is in this group

    • The name "find_fuel_station" says "find": a word for reading.
    Description, as the server wrote it
    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 closest diesel to a stop, an ARAL open tonight, what one forecourt sells. Do NOT use for the plain "where is fuel cheapest" question (call find_cheapest_fuel) or for charging an electric car (call find_charging_station). Every result carries the attribution and the MTS-K note, and says how old each price and opening-hours claim is.

    Annotations the server declares

    • title: Find a filling station
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true
    • destructiveHint: false
  • find_hydrogen_stationReturns 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 …No findings

    Why it is in this group

    • The name "find_hydrogen_station" says "find": a word for reading.
    Description, as the server wrote it
    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 refuel a fuel-cell car, lorry or bus ("Wasserstofftankstelle", "H2 tanken", "hydrogen station near me"). Do NOT use for petrol or diesel (call find_fuel_station) or EV charging (call find_charging_station); LPG/Autogas and CNG are not held — say so. Radius ≤ 150 km, ≤ 10 stations; no live availability or price is published. Shows the attribution line.

    Annotations the server declares

    • title: Hydrogen stations nearby
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_nearbyOverview 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.No findings

    Why it is in this group

    • The name "find_nearby" says "find": a word for reading.
    Description, as the server wrote it
    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>" — a broad look, not one category in depth. Do NOT use for a fuel grade's price (find_cheapest_fuel), charger/connector status (find_charging_station), parking kind/occupancy (find_parking), a NAME lookup (find_place/find_poi/find_address), or a coordinate's address (describe_location). Radius ≤ 15 km, up to 3 per category. Shows each source's attribution.

    Annotations the server declares

    • title: What is nearby
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_parkingParking near a place, a coordinate or along one motorway: lorry parks, car parks, P+R and disabled-badge bays, with total spaces and, where published, free spaces now and the readi…No findings

    Why it is in this group

    • The name "find_parking" says "find": a word for reading.
    Description, as the server wrote it
    Parking near a place, a coordinate or along one motorway: lorry parks, car parks, P+R and disabled-badge bays, with total spaces and, where published, free spaces now and the reading's age. Use when asked where to park or leave the car for the train ("Parkhaus in Köln", "Rastplatz A3", "P+R"). Do NOT use for fuel (find_cheapest_fuel) or EV charging (find_charging_station). Radius ≤ 25 km, ≤ 10 sites per list; ODbL and CC BY-SA sources are separate lists (up to three). No "free now" means no published count, not full. No prices: for "was kostet" say so, no call. Show each source's attribution.

    Annotations the server declares

    • title: Parking nearby
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_placeLooks 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.No findings

    Why it is in this group

    • The name "find_place" says "find": a word for reading.
    Description, as the server wrote it
    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 for another tool, and above all to RECOVER after a tool reported a name as ambiguous — this is where you find out which Neustadt is which. Pass `near` to rank and separate same-named places by distance. Do NOT use to find a company, shop or landmark: call find_poi. At most 10 results, radius <= 200 km. Every result carries an attribution line to show the user.

    Annotations the server declares

    • title: Look up a place
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_poiFinds a business or landmark by name or kind — company, shop, clinic, hotel, hostel — with address, category and coordinate.1 finding

    Why it is in this group

    • The name "find_poi" says "find": a word for reading.

    Findings

    • Warn

      The description contains "any other tool", wording about other tools or servers.

      Matched text

      description: "...el in Weimar". The coordinate passes to any other tool as lat/lon. Do NOT use for a town, dist..."

      What this check looks for
    Description, as the server wrote it
    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 hotel in Weimar". The coordinate passes to any other tool as lat/lon. Do NOT use for a town, district or station (every tool's `place` resolves those), nor for fuel, charging or parking (own tools). Give "in" (a town) when you can: far faster than nationwide. 25 per page, 50 via cursor; radius <= 50 km. OpenStreetMap under ODbL 1.0; show the attribution line.

    Annotations the server declares

    • title: Find a named place
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_roadworks_aheadReturns 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.No findings

    Why it is in this group

    • The name "find_roadworks_ahead" says "find": a word for reading.
    Description, as the server wrote it
    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 long a site lasts ("Baustellen auf der A7 in den Sommerferien?"). ONE road/place per call. Do NOT use when more than one motorway is named, for the situation this minute, or for Baustellen with neither date nor geplant — all three are check_autobahn_traffic; whether a road is open — check_road_status. ≤ 92 days, max 20 sites. Show attribution.

    Annotations the server declares

    • title: Planned roadworks
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • find_sharingReturns 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 …No findings

    Why it is in this group

    • The name "find_sharing" says "find": a word for reading.
    Description, as the server wrote it
    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 someone asks for a rental or shared bike ("Leihrad", "Fahrradverleih", "nächstes nextbike", "bike share near me"). Do NOT use for parking (find_parking) or a general look around a place (find_nearby). Radius ≤ 5 km, ≤ 20 stations; e-scooters are not covered. Shows each source's attribution.

    Annotations the server declares

    • title: Shared bikes nearby
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • get_departuresScheduled departures from any German stop — bus, tram, U-Bahn, S-Bahn, train, ferry.No findings

    Why it is in this group

    • The name "get_departures" says "get": a word for reading.
    Description, as the server wrote it
    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 nächste Bus ab Fulda Bahnhof?" Do NOT use for a railway station's trains now or later today — get_train_departures. Plan times, with a live delay or cancellation per row where held; regional punctuality check_transit_disruption. No A-to-B journeys: say so, no call. Holds ≥ 48 h ahead, ≤ 3 days; further out, say so. 15 per call. Show the attribution line.

    Annotations the server declares

    • title: Scheduled departures (bus, tram, train)
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • get_driving_rulesReturns 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, …No findings

    Why it is in this group

    • The name "get_driving_rules" says "get": a word for reading.
    Description, as the server wrote it
    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 cars. Use when someone drives through Germany or asks whether they may enter a city or street. Do NOT use for live traffic or closures: check_autobahn_traffic; to FIND a charger: find_charging_station. city narrows to its zone; place or lat+lon checks a point against the published zone boundaries. Sourced, dated; show the attribution. Not legal advice.

    Annotations the server declares

    • title: German driving rules
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: false
    • destructiveHint: false
  • get_train_departuresNext trains from a German railway station: platform, delay, cancellations.No findings

    Why it is in this group

    • The name "get_train_departures" says "get": a word for reading.
    Description, as the server wrote it
    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") stays here. A line with no DEPARTURE station ("ist die S1 pünktlich?"; a destination, "nach …"/"zum …", is not one) — check_transit_disruption. Do NOT use for buses, trams, a non-railway stop, another day or a time over 2 h away — get_departures. Train type: categories (ICE/IC/RE/RB/S); no destination filter. ≤ 15 rows, ≤ 120 min. Show the attribution line.

    Annotations the server declares

    • title: Train departures
    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true
    • destructiveHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 2.3.5. Values in angle brackets are yours to fill in.

claude mcp add --transport http viafrei https://mcp.viafrei.de/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__viafrei__find_cheapest_fuel",
      "mcp__viafrei__find_fuel_station",
      "mcp__viafrei__find_parking",
      "mcp__viafrei__check_road_status",
      "mcp__viafrei__find_roadworks_ahead",
      "mcp__viafrei__find_charging_station",
      "mcp__viafrei__find_hydrogen_station",
      "mcp__viafrei__find_place",
      "mcp__viafrei__find_poi",
      "mcp__viafrei__find_address",
      "mcp__viafrei__describe_location",
      "mcp__viafrei__find_nearby",
      "mcp__viafrei__find_sharing",
      "mcp__viafrei__get_driving_rules",
      "mcp__viafrei__check_weather_warnings",
      "mcp__viafrei__get_train_departures",
      "mcp__viafrei__get_departures"
    ],
    "ask": [
      "mcp__viafrei__check_autobahn_traffic",
      "mcp__viafrei__check_transit_disruption",
      "mcp__viafrei__check_station_facilities",
      "mcp__viafrei__watch_situation",
      "mcp__viafrei__stop_watch"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as viafrei. Review it before you use it.