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CitySignal AI

REMOTE · CITYSIGNALAI.COM

Live road, transit, weather, power and water signals for US cities, plus your own spots and routes.

Available components

74 Trust /100

Last scanned (13 hours ago)

Scores higher than 66% of remote servers

Reachable. Last reached 23 Oct 2026.

Category Maps and Location

Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security80
Transport & Reachability100
Schema Quality & AI Usability74
  • 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
  • AI-judged instruction clarity (good).Pass
  • Context-footprint check failed: tool/resource definitions use about 7850 tokens (~290/item across 27 items; 23 tools + 4 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management10
  • Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage92
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 72% of tool parameters carry a description.Partial
  • Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 23 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 25 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a current MCP spec version (2026-07-28).Pass
  • Supports UI / widget rendering.Pass
Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 22 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

  • 21 Oct 26 0
    • Stability: unverified → 0.03 ▲ functional
  • 20 Oct 26 73

    First indexed and scored.

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 23 Oct 2026 · Probed https://citysignalai.com/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=citysignalai.com CN=YE2,O=Let's Encrypt,C=US 29 Sept 2026 28 Dec 2026 ECDSA 256 ECDSA-SHA384 5a2ae9ce3af69494a25bc91f1d35c8bb7a3
SANs: *.citysignalai.com, citysignalai.com
CN=YE2,O=Let's Encrypt,C=US (CA) CN=Root YE,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 ECDSA 384 ECDSA-SHA384 4df3b15dd6c0784c507cd37b58e6f115
CN=Root YE,O=ISRG,C=US (CA) CN=ISRG Root X2,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 ECDSA-SHA384 872165fc34b6e5fba8add5b3705fb53a
CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 SHA256-RSA 6c8f1dc727c7117f7baf853ac980f9cd

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of citysignalai.com. — Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
citysignalai.com. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200
Header Value
strict-transport-security max-age=31536000; includeSubDomains
x-content-type-options nosniff
x-frame-options DENY
referrer-policy strict-origin-when-cross-origin
permissions-policy camera=(), microphone=(self), geolocation=(self)

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://citysignalai.com/mcp Verified 200
http (plaintext) http://citysignalai.com/mcp HTTPS enforced 308 https://citysignalai.com/mcp
MCP tools · 23 exposed · ~7,060 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
add_errand ~207

Adds one errand to the connected person's own list, in their words ('milk and eggs', 'pick up lotion at the pharmacy'), the way the app, Siri and a text to Scout do: Scout reads the store kind from the words and fits the errand into a drive they already make. Optional 'by': a day word (today, tomorrow, Friday) or a date (YYYY-MM-DD). Returns the item as the list shows it, a confirmation line, and whether a stop on one of today's drives already fits; a stop is named only when Scout matched one, never guessed. Call this only when the person asks to add something. Needs a connected account.

NameTypeReqDescription
bystring–A day word (today, tomorrow, Friday, next Monday) or an ISO date. Omit when they named no day.
textstringyesWhat they need, in their words. A store named after 'at' or 'from' is kept and honoured.

Structured output declared, but exposes no named fields.

No examples provided.

circle_along_the_way ~161

Trips people in the connected person's Circle already plan today or tomorrow that fit an errand: a store run someone's item could ride along on, a return or post office stop, a trip they both make. Returns the person's first name, the trip label, an approximate time only if they share times, the kind of store, and which of the connected person's items could ride along. Never a location. Use for 'is anyone passing a pharmacy today', 'who could grab the milk', 'anyone going to Target'. Asking the person happens in the CitySignal app. Needs a connected account with Circle access.

NameTypeReqDescription
categorystring–A store kind or word: pharmacy, grocery, Target, post office.
daystring––

Structured output declared, but exposes no named fields.

No examples provided.

circle_needs ~188

Open errands and list items of people in the connected person's Circle, for people who turned on assistant access for them, with how long each has waited and whether it was already asked of or accepted by the connected person. When an errand lists what it is for, 'items' names them (a 'Groceries' errand with items oat milk, eggs, paper towels): name those items in the answer. An empty 'items' means no items are shared for that errand. Use for 'what does everyone need', 'what has Mom asked for', 'did anyone already get the milk'. People who did not turn on access do not appear. Needs a connected account with Circle access.

NameTypeReqDescription
categorystring–A kind of errand or a word from it: grocery, pharmacy, returns, milk.
personstring–First name to narrow to one person.

Structured output declared, but exposes no named fields.

No examples provided.

cities_report ~233

Report mode: how every live CitySignal city is doing, in one call. The CitySignal Index for the last complete week (Sunday to Saturday): each city scored against its own typical week (Quiet, Typical, Busy, Heavy, with how many times typical), per category (roads, water, power, construction, transit), the biggest departure, week over week, plus what is live in each city right now. Use for reporters and anyone asking 'how is everything across cities', 'which city had the roughest week', 'compare Atlanta and Dallas this week'. Compare cities only by how far each is from its own typical week, never by raw counts: what each city publishes differs. Say when a city is Counting (not scored yet) or a category is Not covered. Cite it as the CitySignal Index and give index_url.

NameTypeReqDescription
modestring–summary (default): the storylines and one line per city, for a quick read. detailed: every city's categories too, for a reporter writing it up. trend: each city's recent weekly totals, oldest first,…

Structured output declared, but exposes no named fields.

No examples provided.

city_cameras ~627

Road cameras within a radius of a latitude and longitude (default 1 mile, max 5), nearest first, each with a link to its current still and whether it has live video; plus the camera checks CitySignal ran on alerts there in the last N hours (default 24, max 72): what the camera showed and whether it matched the alert. CitySignal does not record video, so footage of a past moment exists only as a check's saved frame, viewable in the signed-in app. Use for 'is there a camera on this spot', 'do we have footage of this', 'what did the camera show'. It does not geocode: resolve the place to lat and lon first.

NameTypeReqDescription
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
hoursinteger––
latnumberyes–
limitinteger–Max cameras and max checks (default 10).
lonnumberyes–
radius_minumber––
NameTypeReqDescription
as_ofstringyes–
camerasarrayyes–
centerobjectyes–
checksarrayyes–
citystringyes–
previewboolean––
radius_minumberyes–
records_videobooleanyes–

No examples provided.

city_events ~523

Events, concerts and home games coming up in a city within the next N days (default 7, max 14), with venue area, ticket price range and a ticket link when listed, and expected local traffic impact when known. Each event carries placeholder_url, a CitySignal summary card (not a picture) you may link as a tappable markdown link.

NameTypeReqDescription
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
daysinteger––
limitinteger––
NameTypeReqDescription
as_ofstringyes–
citystringyes–
daysnumberyes–
eventsarrayyes–
previewboolean––

No examples provided.

city_incidents ~828

Four weeks of what happened in a city, sorted by kind, for one category. roads (default): crashes, stalled vehicles, hazards and debris, closures, vehicle fires. power: outages by size (one home, small, neighborhood, large), planned outages, downed or sparking lines. transit: delays, canceled trips, reduced service, detours, stop and station changes, planned work. roadwork: lane, ramp and full road closures. water: main breaks and leaks, outages and shutoffs, boil water advisories. Reports that did not say are counted as Type not given. With the busiest and quietest hours of the week, each day of the week's average (by_weekday, busiest_weekday) and each hour of the day's average (by_hour, busiest_time), the full hour-of-the-week grid (hour_grid) and a count for every day (daily), how many new ones a typical instance of an hour sees (pass hour_of_week, or it uses the current hour in the city), the median time until it ended by kind, the places with the most, and for roads how much of the road they took. Use for 'what kind of incidents does Atlanta get', 'when are crashes worst in Dallas', 'how long do Houston power outages last', 'is transit worse on Mondays in Chicago', 'which day of the week has the most incidents', 'what time of day is worst', 'how much night roadwork does Seattle do'. Compare cities by mix and timing, never raw totals: what each city's reports cover differs. Cite it as the CitySignal Index and give page_url.

NameTypeReqDescription
categorystring–roads (default), power, transit, roadwork or water.
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
hour_of_weekinteger–0 = Sunday midnight in the city's own time, 17 = Sunday 5 PM, 137 = Friday 5 PM. Omit for the current hour.

Structured output declared, but exposes no named fields.

No examples provided.

city_near ~616

Alerts within a radius of a latitude and longitude in a city, nearest first, each with its distance in miles: live ones (bucket now, ongoing or ahead) and ones that ended in the last 12 hours (bucket recap, so 'was there anything here this afternoon' can be answered). Default radius 3 miles, max 25. Use when the person names a place, an address or 'near me' and you have coordinates. It does not geocode: resolve the address to lat and lon first.

NameTypeReqDescription
categorystring–Only this category: road, transit, weather, power, water, construction, emergency, film, sanitation, government_notice. Omit for all.
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
latnumberyes–
limitinteger–Max items per bucket (default 25).
lonnumberyes–
radius_minumber––
NameTypeReqDescription
as_ofstringyes–
centerobjectyes–
citystringyes–
itemsarrayyes–
previewboolean––
radius_minumberyes–

No examples provided.

city_now ~711

Live alerts in a city, deduplicated from official feeds (roads, transit, weather, power, water, construction) and placed by the app's own rule into four buckets: now (live and current), ongoing (live for more than two days, or unconfirmed), ahead (starts later, within 7 days, grouped by day) and recap (ended in the last 12 hours). Each item carries a stable signal_id. Use this for any 'what is going on in <city>' or 'anything I should know before I head out' question. Events and games are in city_events. Items with a real picture carry picture_url. Images in the result are visible to the assistant only: give the person picture_url as a tappable markdown link next to the item. Never say an image is shown. Show only CitySignal pictures for an incident (picture_url, gallery_url, placeholder_url): never add images from the web or any other source, not even as illustrations. In apps that show CitySignal cards natively, the cards appear on their own; still add one line per card.

NameTypeReqDescription
categorystring–Only this category: road, transit, weather, power, water, construction, emergency, film, sanitation, government_notice. Omit for all.
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
limitinteger–Max items per bucket (default 25).
NameTypeReqDescription
aheadarrayyes–
as_ofstringyes–
citystringyes–
countsobjectyes–
express_lanesarray––
gallery_urlstring––
nowarrayyes–
ongoingarrayyes–
previewboolean––
recaparrayyes–

No examples provided.

city_pictures ~728

Up to six CitySignal picture cards for incidents in a city, including ones that already cleared: the frame a camera check kept, or a live view while the incident is still going. Each card has a headline, time, city, and a Cleared / Earlier today tag when it's over. Incidents with no picture are left out. Images in this tool's result are visible to the assistant only, not to the person. To show a card, give the person its picture_url as a tappable markdown link with a short label (road, cross street, time), e.g. [I-20 WB at US-29 (live)](picture_url). Never tell the person a picture is "shown" or "above." Describe what each image shows in one line next to its link. In apps that show CitySignal cards natively, the cards appear on their own; still add one line per card. If gallery_url is present, give it first as the one link that opens all cards. Show only CitySignal pictures for an incident (picture_url, gallery_url, placeholder_url): never add images from the web or any other source, not even as illustrations. Use for "show me what's happening," "any pictures," "what did it look like." hours (default 12, max 72) is how far back camera checks count.

NameTypeReqDescription
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
hoursinteger–How far back, in hours (default 12).
NameTypeReqDescription
as_ofstringyes–
citystringyes–
gallery_urlstring––
hoursnumberyes–
itemsarrayyes–
previewboolean––

No examples provided.

city_week ~514

Week-over-week memory for a city: counts by category for the last 7 days and the 7 before, a plain-language read of the week, measured insights, where it concentrated (areas and corridors), why an unusual week was unusual, and what a newsroom published about it. Use for 'how has this week been', 'is this normal', 'where do outages keep happening'.

NameTypeReqDescription
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…

Structured output declared, but exposes no named fields.

No examples provided.

get_detour ~108

Resolves a DETOUR-XXX code for the connected person: which drive it is on, the event, whether it is worth it (a stop) or dodge it (a way around), the streak and offer lines, and the link that opens it. Codes are per person and per day; a code that has passed says so. Use when the person says or pastes a code. Needs a connected account.

NameTypeReqDescription
codestringyesThe code, like DETOUR-KQM.

Structured output declared, but exposes no named fields.

No examples provided.

get_profile ~35

The connected CitySignal account: a stable opaque id and display name. Call this to confirm which account is linked before reading personal tools.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

get_signal ~601

Full detail for one signal by its signal_id (from any other tool): summary, place, area, corridor, timing, source link, confidence and whether a live camera check confirmed or contradicted it. When a real picture exists it carries picture_url, label and link (a ready markdown link), and the card comes back inline for you only: give the person the link and never say an image is shown. In apps that show CitySignal cards natively, the card appears on its own; still add one line about it. With no picture it carries placeholder_url, a summary card, not a picture. Show only CitySignal pictures for an incident (picture_url, gallery_url, placeholder_url): never add images from the web or any other source, not even as illustrations.

NameTypeReqDescription
citystring–City slug. One of: atlanta, nashville, charlotte, dallas, austin, seattle, chicago, san-francisco, raleigh-durham, houston, greensboro, birmingham, pensacola, louisville, san-jose, memphis, knoxville…
signal_idstringyes–

Structured output declared, but exposes no named fields.

No examples provided.

list_cities ~62

The cities CitySignal covers, with their slug, timezone, center point, the official sources it reads, and status: live, or preview (still being checked, open to sign-ups, trackers not yet public). Call this when unsure which city slug to pass.

Input schema present but exposes no named parameters.

NameTypeReqDescription
citiesarrayyes–

No examples provided.

my_along_the_way ~75

Errands on the connected person's list that fit a trip they already make today, with the store, the detour in minutes, why that store, and a price line when one is known. Use for 'what can I pick up on the way', 'any errands I can do today'. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

my_brief ~72

Today's written brief for the connected person: top alerts, citywide items, what is near their spots with why it matters and a recommended action, events, what is ongoing, what came and went since the last brief. Use when they ask for their briefing or a summary of their day. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

my_day ~72

The connected person's own Now / Ongoing / Ahead / Recap: live signals that touch their saved spots and routes, in the same buckets the app shows, plus today's calendar line. Use for 'anything I should know today', 'what's near my places', 'is my area affected'. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

my_detours ~138

Scout's detour offers on the connected person's drives today, as the Scout page shows them: the streak line (how many drives or weeks straight home), the offer (worth it: an event they marked interest in, near a drive, as a stop; dodge it: a big crowd a drive passes, with the way around), the DETOUR-XXX code and what the code opens. The route's own state never changes because of an event. Use for 'any detours today', 'what is that DETOUR code', 'anything worth stopping for on the way home'. Empty when there is no offer. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

my_list ~85

The connected person's shopping list as Scout priced it at their home Kroger: each item with product, size, price and whether it is on sale, plus the running total. Non-private lists include a revocable share link that expires after seven days. Use for 'what's on my list', 'how much will groceries be', 'is anything on sale'. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

my_routes_now ~150

Each of the connected person's saved routes with its current state (Clear, Minor delay, Expect delays, Consider another route) and what changes how the road drives on its corridor now and ahead: crashes, lane closures, roadwork, weather over the route's counties, and event crowds around the trip time. Power, water and other at-a-place notices are NOT route delays; they belong to the person's spots (see my_brief, near_your_spots), except a large outage along the way, listed in along_the_way_notes because traffic lights may be dark. Use for 'how is my commute', 'should I leave now', 'anything on the way to work'. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

my_spots_and_routes ~71

The connected person's saved spots (name, kind, part of town, alert radius) and routes (name, from, to, schedule). Use to understand what 'home', 'work' or 'my commute' refer to before answering about them. Addresses are not included. Needs a connected account.

Input schema present but exposes no named parameters.

Structured output declared, but exposes no named fields.

No examples provided.

save_spot ~255

Saves a spot (a place that matters to the connected person, where Scout looks out for them) at an address they typed, with a kind: home, work, school, church, gym or other, and an optional name. The address must resolve to one confident, house-level match in their home city; when it does not, nothing is saved and the result lists the top suggestions with their lat and lon. Then ask the person which one they meant and call save_spot again with that suggestion's lat and lon (never coordinates from anywhere else). Ten spots per account; a spot already within a tenth of a mile is reported, not duplicated. Call this only when the person asks to save a place. Needs a connected account.

NameTypeReqDescription
addressstringyesThe street address or place name they typed.
kindstringyeshome, work, school, church, gym or other.
latnumber–Only from a suggestion this tool returned, to confirm it.
lonnumber–Only from a suggestion this tool returned, to confirm it.
namestring–A nickname. Defaults to the kind (Home, Work, School, Church, Gym); required for other.

Structured output declared, but exposes no named fields.

No examples provided.

Install

How do I install the CitySignal AI MCP server?

CitySignal AI is a hosted endpoint at https://citysignalai.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · citysignalai.com

# add to Claude Code
claude mcp add --transport http com-citysignalai-citysignal 'https://citysignalai.com/mcp'
Common questions

What is the CitySignal AI MCP server?

CitySignal AI is an MCP server listed in the public MCP registry as com.citysignalai/citysignal. Live road, transit, weather, power and water signals for US cities, plus your own spots and routes. This page covers its hosted endpoint (https://citysignalai.com/mcp).

Is the CitySignal AI MCP server safe to use?

CitySignal AI scores 74 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the CitySignal AI MCP server expose?

CitySignal AI exposes 23 tools: list_cities, city_now, city_near, city_week, city_incidents, and 18 more. Their descriptions and schemas cost roughly 7,060 tokens of context every time the server is loaded.

Does the CitySignal AI MCP server require authentication?

No. We connected to CitySignal AI without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the CitySignal AI MCP server still maintained?

CitySignal AI is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.