ViaFrei MCP Server

by viafrei Your server? Claim it

answering

ViaFrei is answering right now. Last checked 3 min ago. It exposes 23 tools. Last commit 2 Nov 2026.

The German Real-Time Mobility Context Platform for AI: traffic, trains, charging, parking, weather.

Uptime history 26 days of history · worst day 49%

26 days agonow

50.3%

Uptime 24h

92 of 183 checks

Tools

read from the server

150 ms

Response time

average over 24h

Stars

last commit 2 Nov 2026

What changed 219

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 8 October 2026. No other catalogue keeps this.

2 Nov 12 tools changed the parameters they ask for15 times that day check_autobahn_traffic, check_road_status, check_weather_warnings and 9 more

2 Nov a tool changed version4 times that day

2 Nov 3 tool descriptions were rewritten find_charging_station, find_nearby, get_departures

2 Nov a tool appeared find_speed_cameras

30 Oct a tool changed version

29 Oct a tool changed version2 times that day

28 Oct a tool changed version4 times that day

27 Oct 2 tool descriptions were rewritten find_charging_station, get_train_departures

27 Oct a tool changed version2 times that day

27 Oct a tool changed the parameters it asks for find_charging_station

and 195 more, back to 8 October 2026

ViaFrei does not always answer

Over the last week it answered 49.9% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://mcp.viafrei.de/mcp

~/.codex/config.toml

[mcp_servers.mcp]
url = "https://mcp.viafrei.de/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "url": "https://mcp.viafrei.de/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://mcp.viafrei.de/mcp"
    }
  }
}

This server publishes 1 more address. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Available tools 23

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

address

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 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.

autobahn

check_autobahn_traffic

Per motorway (≤ 5): an Ampel verdict, then jams, closures, roadworks in force now, with place/delay/speed/map. 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.

charging

find_charging_station

Returns EV charging sites near a place or coordinate: operator, plugs, max power, price per kWh where published, and points free now where live status is published. Filters: plug, power (min/max kW), operator, free now, conditions (24/7, card, free of charge, public). 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 (find_cheapest_fuel) or E-Kennzeichen rules (get_driving_rules). Radius ≤ 25 km, ≤ 10 sites; missing availability is unknown, never free. Show the attribution line.

cheapest

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_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.

departures

get_departures

Scheduled departures from any German stop — bus, tram, U-/S-Bahn, train, ferry — or the nearest stops around a place ("Abfahrten in der Nähe"). 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 rail station's trains today: get_train_departures. Plan times with live delay/cancellation where held; punctuality: check_transit_disruption. No A-to-B journeys: say so, no call. Holds ≥ 48 h ahead, ≤ 3 days. 15 per call. Show the attribution line.

describe

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 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.

driving

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 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.

fuel

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 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.

hydrogen

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 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.

nearby

find_nearby

Overview of what is around a place or coordinate: fuel, EV charging, parking, nearest railway station and motorway junction, with distances; everyday places (shop, pharmacy, cash, food, hotel, workshop, police) only when named in categories. Use when asked "what is around me". Do NOT use for a fuel grade's price (find_cheapest_fuel), charger status (find_charging_station), parking 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 (5 per need). Shows each source's attribution.

parking

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 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.

place

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 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.

poi

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 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.

road

check_road_status

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

roadworks

find_roadworks_ahead

Returns roadworks PLANNED on one motorway, one Bundes-/Landesstraße in NI, NW, HE, BW, MV, SN or TH (BY: B only), or city streets by place, in a date window: where, impact, dates, map links. 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.

sharing

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 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.

speed

find_speed_cameras

Returns a town's published speed-enforcement locations (fixed and red-light cameras, section control, announced mobile checks, measuring sites) by kind and street, with the § 23 Abs. 1c StVO notice. Use when someone plans a trip and asks where speed cameras are ("Blitzer Köln"). Planning only — show the notice verbatim. If they say they are driving now: show the notice, offer the list for before the trip or a stop. Never read locations to a driver, never a live warning. Do NOT use for speed limits (get_driving_rules) or roadworks (check_road_status). Area ≤ 25 km. Shows the attribution line.

station

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 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.

stop

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: 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.

train

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; later today ("heute Abend") stays here. A line with no DEPARTURE station ("ist die S1 pünktlich?"; a destination, "nach …", is not one) — check_transit_disruption. Lists its U-Bahn and trams too. Do NOT use for one bus/tram/U-Bahn line, a non-railway stop, another day or 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.

transit

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 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.

watch

watch_situation

Opens a watch so THIS conversation is told when something changes: a road closed or restricted, a motorway 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 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.

weather

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 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.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.viafrei.de/mcp	streamable-http	answering	190 ms	3 min ago
https://mcp.viafrei.de/sse	sse	answering	122 ms	4 min ago

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ViaFrei — questions

Answers built from our own checks of this server.

What can ViaFrei do?

It exposes 23 tools, read directly from the server on our last check. Among them: check_autobahn_traffic, check_road_status, check_station_facilities, check_transit_disruption, check_weather_warnings, describe_location and 17 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is ViaFrei working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 183 checks got a reply (50.3%), average response time 150 ms. The bar chart above shows every period we have measured.

How do I connect ViaFrei?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does ViaFrei need an API key?

No. ViaFrei completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 23 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is ViaFrei?

It answers our handshake in 150 ms on average, which is faster than 83% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is ViaFrei open source?

The code is open source: it is published under the Apache-2.0 licence, written in JavaScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at mcp.viafrei.de, which runs on its operator's own terms.