Mu MCP server

• apps_buildFree

  Queue a durable app build and immediately return its ID and status URL. Use BuildStatus to retrieve progress and the completed app. Reuse request_key on retries. Builds survive server restarts

• apps_buildstatusFree

  Read your saved app build status by ID. Poll until complete or failed; the same ID survives restarts.

• apps_createwrite actionFree

  Create an app — a small, self-contained HTML tool hosted here. Takes the HTML; apps_build writes it for you from a description Apps run in a sandbox. Use fetch('/api/v1/<service>/<method>') or mu.service(name, method, args); mu.api does not exist. Direct external fetch is blocked. Inspect real service schemas and data before coding; never invent fields, rankings or claim runtime verification from static checks.

• apps_editFree

  Edit an app you own — its name, description, tags, icon, HTML or price. Fields left out keep their value Apps run in a sandbox. Use fetch('/api/v1/<service>/<method>') or mu.service(name, method, args); mu.api does not exist. Direct external fetch is blocked. Inspect real service schemas and data before coding; never invent fields, rankings or claim runtime verification from static checks.

• apps_embedFree

  Show a saved micro app in the conversation. Embedding preserves access permissions and does not publish the app

• apps_forkFree

  Fork an app into your own account, to change independently of the original

• apps_readFree

  Read an app or build status by slug, including source HTML for apps you own

• apps_searchFree

  Find your saved private micro apps by name, description or tag

• apps_testFree

  Test an app by checking its HTML and checking supported SDK calls; this is not browser execution, so an author finds out what is broken without opening it

• archive_listFree

  With a kind, the most recent entries of it. Without one, what kinds are archived and how much of each

• archive_searchFree

  Search everything this instance has collected, across news, video, markets and posts at once. Use it when the question crosses a service, or when you do not know which service would hold the answer; news_search is narrower and better when you know it is news

• blog_createwrite actionFree

  Publish a post to the caller's blog. For anything meant to be read later by other people — notes, write-ups, announcements. For a private note to yourself, prefer files or memory

• blog_deletewrite actionFree

  Delete one of the caller's own blog posts, by id or title. Refuses posts written by anyone else, and refuses an ambiguous title rather than guessing. Irreversible, so confirm with the user first

• blog_listFree

  Read recent blog posts — titles, snippets and ids

• blog_readFree

  Read one blog post in full, by id or by title. Use after blog_list has found a candidate and the summary is not enough

• blog_updatewrite actionFree

  Edit one of the caller's own posts. Fields left out keep their current value

• bookmarks_addFree

  Save an article, video, blog post or link privately. Re-saving preserves its note

• bookmarks_annotateFree

  Set or clear a private note on one saved item

• bookmarks_deletewrite actionFree

  Remove one of your saved items

• bookmarks_getFree

  Read one saved item and its private note, with available archived text. Videos have descriptions, not transcripts

• bookmarks_listFree

  Find your saved reading by text or kind, newest first. Private notes are searched too

• browser_readFree

  Open a page in a real browser and read it after its JavaScript has run. Use it when web_fetch comes back empty or with only a nav bar, which is what a page that builds itself in the browser looks like to a plain fetch. web_fetch is free and is the right first try; this costs, because it runs a browser

• browser_shotFree

  Photograph a page and get back a URL for the picture. What it looks like, rather than what it says — a chart, a layout, a page whose content is an image. Ask for full to capture past the first screenful

• chat_messagesFree

  Read the recent conversation in a discussion room

• chat_roomsFree

  List discussion rooms that currently have activity

• chat_sendwrite actionFree

  Say something in a discussion room, as the caller. Use chat_rooms to find the room id

• chat_sourceFree

  Read one stored message owned by the caller, by id

• chat_sourcesFree

  List stored message ids owned by the caller

• contacts_addFree

  Save someone to the address book. Adding a name already there updates it rather than making a second card

• contacts_deletewrite actionFree

  Remove someone from the address book

• contacts_findFree

  Look someone up in the address book by name, part of a name, or address. Use this before sending mail to a person named rather than addressed

• contacts_listFree

  List everyone in the caller's address book

• docs_deletewrite actionFree

  Delete one of your documents, by id

• docs_listFree

  List your documents, most recently changed first, with an optional search over titles and bodies. Use this to find an id

• docs_readFree

  Read one of your documents in full, by id or by exact title

• docs_writewrite actionFree

  Write a document — a title and a markdown body. Pass an id to replace one you already have. Private unless you set public. For something long enough to re-read; for a short thing to remember, use notes

• events_createwrite actionFree

  Schedule a reminder or event at a given time; optionally repeating, and optionally running a prompt through the agent when it fires

• events_deletewrite actionFree

  Cancel an event by id

• events_freeFree

  Find when the caller has nothing booked — open slots of a given length, within working hours

• events_listFree

  List the caller's upcoming events and reminders, each with its id

• events_readFree

  Read one schedule owned by the caller

• events_updatewrite actionFree

  Update one of your scheduled events without changing its id. Omitted fields stay unchanged; empty notes, prompts or recurrence clear them

• files_deletewrite actionFree

  Delete a file you own

• files_drivereadFree

  Read the caller's connected Google Drive. Read-only; connect in Account first.

• files_drivesearchFree

  Search the caller's connected Google Drive. Read-only; connect in Account first.

• files_getFree

  Read a stored file back by its id

• files_listFree

  List the caller's stored files, newest first

• files_putwrite actionFree

  Store a file and get a URL for it — a report, a CSV, a transcript

• files_shareFree

  Make a file readable by anyone with its URL, or private again

• flights_airportFree

  Report what is happening at an airport right now: what is on the ground, what is on approach and what is climbing out. Live positions, not the timetable, so it says nothing about scheduled or delayed departures

• flights_overheadFree

  List the aircraft flying near a location right now, nearest first, with altitude, speed, heading and distance. Live positions broadcast by the aircraft themselves, not a schedule

• flights_statusFree

  Scheduled, estimated and actual flight arrival/departure times from Aviationstack. Requires a configured provider.

• flights_trackFree

  Find where an aircraft is right now by flight number ('BA117'), radio callsign ('BAW117') or registration ('G-ZBKL'). Only sees aeroplanes that are airborne and in range of a receiver — not finding one does not mean the flight was cancelled

• food_hygieneFree

  Food hygiene ratings for UK businesses, from the Food Standards Agency inspections. Takes a business name, a town or postcode, or a lat/lon to look around

• food_productFree

  Look up a packaged food by its barcode — name, brand, ingredients, allergens, nutrition per 100g, Nutri-Score and how processed it is

• food_searchFree

  Find packaged foods by name or brand, with the barcode of each so one can then be looked up in full

• hazards_alertsFree

  Current disasters worldwide from GDACS — cyclones, floods, volcanoes, wildfires and earthquakes — with an alert level of green, orange or red. Pass lat/lon to ask about somewhere in particular

• hazards_floodsFree

  Flood warnings and alerts in force in England, most severe first, from the Environment Agency. The one hazard here that is a forecast rather than a record — a warning says flooding is expected, which is something you can act on. Optionally near a point. England only, and the answer says so

• hazards_quakesFree

  Recent earthquakes worldwide from the USGS, with magnitude, place and how long ago. Pass lat/lon to ask about somewhere in particular, min for a magnitude floor, and period for hour, day, week or month

• images_dailyFree

  Retrieve the current daily image or a date

• images_deletewrite actionFree

  Delete an image you own

• images_generateFree

  Generate an image from a text prompt and return its URL

• images_getFree

  Retrieve accessible image metadata and URL

• images_listFree

  List stored images or the daily archive with pagination

• images_searchFree

  Search accessible stored images by title, description, prompt and tags; public by default

• images_shareFree

  Explicitly publish or unpublish your image

• images_updatewrite actionFree

  Edit metadata on an image you own

• images_uploadwrite actionFree

  Upload a private raster image

• islam_readFree

  Read the full Islamic source passage from an islam_search result, with its source and reference. Preserve distinctions between original text, translation and commentary.

• islam_searchFree

  Search Aslam.org's Quran, hadith, names of Allah, Seerah, Ghazali, IslamQA, adhkar and Riyad us-Salihin. Returns reference excerpts, not generated answers. Distinguish Quran and hadith from biography and scholarly interpretation; cite the source.

• mail_gmailreadFree

  Read the caller's connected Gmail. Read-only; connect in Account first.

• mail_gmailsearchFree

  Search the caller's connected Gmail. Read-only; connect in Account first.

• mail_inboxFree

  List the account's most recent messages — read my mail, check my inbox

• mail_infoFree

  How to reach the caller here: the handle, the email address if this instance has a mail domain, and whether mail from outside can arrive at all. Pass a tag for a separate one (you+tag) — give that out, then read only its messages with mail_inbox(tag)

• mail_markreadFree

  Mark specified inbox message IDs, or explicitly all current inbox messages, as read. Changes read status only; does not read, summarize or triage the content.

• mail_readFree

  Read your correspondence by id in bounded body-character pages, including attachment names. Follow the returned next offset for the rest. Omitting id retains the legacy inbox summary

• mail_searchFree

  Search the account's mail and return matching messages

• mail_sendwrite actionFree

  Write to somebody, as you. A username reaches them on this instance and is free; a full email address leaves over SMTP under this instance's domain, so a reply comes back to your inbox, and is charged. Resolve a name with contacts_find first. Mail that leaves needs MAIL_DOMAIN configured on the instance

• mail_sourceFree

  Read one stored message owned by the caller, by id

• mail_sourcesFree

  List stored message ids owned by the caller

• maps_areaFree

  Every tile covering a bounding box at a zoom level, as URLs, row by row from the north-west, and how many are already held. What to ask for when you want the map around a place rather than one numbered tile

• maps_tileFree

  The URL for one map tile, by zoom, column and row. Styles: road, outdoor (rights of way and contours), light (a quiet basemap to draw on). Free. Britain only

• markets_convertFree

  Convert an amount from one currency to another — 250 GBP in JPY. Uses European Central Bank reference rates, and takes a past date back to 1999. Crypto converts at the live price through the dollar

• markets_historyFree

  Read daily closing prices for a supported instrument over a range of up to 366 days. Missing trading days are omitted. Uses Yahoo Finance

• markets_listFree

  Get live prices for cryptocurrencies, stocks, commodities (oil, gold, silver, copper and crops), futures and currencies

• markets_quoteFree

  Read one supported instrument price in USD, with source, timestamp and staleness

• news_headlinesFree

  Read the home card headlines: latest story per topic, freshest first, at most ten

• news_listFree

  Read recent news headlines with short summaries, balanced across topics

• news_readFree

  Read one news article in full by its id or URL

• news_searchFree

  Search indexed and live news for a topic

• notes_addwrite actionFree

  Write a note under a title, so it is there next conversation. Writing a title that exists rewrites that note

• notes_deletewrite actionFree

  Delete one note by title

• notes_getFree

  Read one note by title. Use it when you know the title; notes_list when you do not

• notes_listFree

  List every note the caller has written, with its text

• notify_devicesFree

  Whether this account can be reached by notification at all, and on which devices. Worth asking before promising to tell somebody something

• notify_sendwrite actionFree

  Interrupt yourself on your own devices — a phone, a laptop — with the page closed. For the thing that cannot wait until the next time somebody looks. An answer to a question belongs in the thread it was asked in, not here

• places_addressFree

  Name the place at a latitude and longitude — the reverse of places_geocode. Use it whenever you have coordinates and need to say where that is

• places_elevationFree

  How high a place is above sea level, in metres and feet. Sampled from a 90-metre global elevation model, so a summit reads a little under its surveyed height

• places_geocodeFree

  Resolve a place name or address to coordinates

• places_nearbyFree

  List points of interest near a location. Each one says whether it is open right now where that is known, so "is anything open near me" is one call

• places_searchFree

  Find places by name or category, optionally near a location. Each one says whether it is open right now where that is known, rather than raw opening-hours text to interpret

• prayer_qiblaFree

  Get the qibla — the compass bearing to face for Islamic prayer from a location

• prayer_reflectionFree

  Get today's Islamic reflection — a verse of the Quran with its surah, a saying of the Prophet, and a name of Allah

• prayer_sayingFree

  Look up a hadith from Sahih al-Bukhari, optionally from a given book

• prayer_searchFree

  Search the Quran, the hadith and the names of Allah by meaning — ask a question in plain language rather than naming a reference

• prayer_timesFree

  Get today's Islamic prayer times (salah) for a location, and which prayer is next

• prayer_verseFree

  Look up a chapter of the Quran, or one verse within it, by number. Use prayer_search to ask a question instead of naming a reference

• recall_conversationFree

  Read one whole conversation back by id, as recall_search and recall_list report it

• recall_listFree

  List the caller's conversations, most recently active first, with what each is about and where it happened

• recall_searchFree

  Search everything the caller has said to an agent and been told, wherever they said it — the browser, email, or the command line. Use it when something was mentioned and you need to find where; notes_get is for a fact somebody wrote down on purpose

• routes_directionsFree

  The turn-by-turn route between two places, with the distance for each instruction. Use ETA instead when only the travel time is wanted — this asks the provider for more and costs more

• routes_etaFree

  How long it takes to travel between two places, by road rather than as the crow flies. Can be asked about a future departure, or told when you need to arrive and answer when to leave

• routes_nearestFree

  Given a starting point and several destinations, say which is quickest to reach and put them in order. Each destination is a separate routing lookup, so ask about the places you are actually choosing between rather than a long list

• shell_runwrite actionFree

  Run a shell command in your account's container sandbox and get back what it wrote. A real shell in a container: pipes, redirection and && all work, the working directory is /work and files there persist between calls. Use it to build, test, run scripts and move files about. A non-zero exit code comes back in the response rather than as an error, so read the output — a failing build is an answer

• shell_writewrite actionFree

  Put a file in your account's container sandbox, creating any missing directories. The only file operation that is not a shell command, because it is the one a shell is bad at: source is full of quotes and backticks and a heredoc will mangle it. The content arrives as a string and reaches the file without a shell seeing it. To read, list, search or change a file, use the shell — cat, ls, grep and sed are right there

• sms_historyFree

  Read the texts this account has sent and received, newest first. Both directions, which is why it is not called an inbox

• sms_numberFree

  The number texts are sent from, which numbers are verified as yours, and how many messages are left today

• sms_sendwrite actionFree

  Message somebody from this instance's number, by text or on WhatsApp. A text is charged per 160-character segment; WhatsApp is charged per 24-hour conversation and only reaches somebody who wrote in within the last day. Capped per day either way, and the recipient can stop it with STOP

• sms_sourceFree

  Read one stored message owned by the caller, by id

• sms_sourcesFree

  List stored message ids owned by the caller

• sms_verifyFree

  Claim a number as your own, so texts arriving from it reach this account. Call it with just the number to have a code texted there, then again with the code

• social_listFree

  Read the latest social posts from the network

• social_searchFree

  Search public posts on this instance by keyword. This is the instance's own feed, not the wider internet — use web_search for that

• stream_listFree

  Read what has happened here recently

• tasks_createwrite actionFree

  Add a task. Assign it to the agent and it can pick the task up itself

• tasks_deletewrite actionFree

  Remove a task

• tasks_listFree

  List the caller's tasks, open ones first; optionally filtered by state

• tasks_nextFree

  The next task assigned to the agent — what to work on now

• tasks_readFree

  Read one task owned by the caller

• tasks_updatewrite actionFree

  Change a task: its state, or the result of doing it

• text_classifyFree

  Sort text into one of the labels you give, with a confidence. For routing, triage and moderation. Capped at 30,000 characters

• text_extractFree

  Turn text into JSON matching a schema you give. Pass the fields you want as a JSON schema or a plain description; returns JSON only. Capped at 30,000 characters

• text_summariseFree

  Summarise text into a few sentences. Pass style=bullets for a list, or a sentence count. Capped at 30,000 characters

• text_translateFree

  Translate text into another language, preserving formatting. Capped at 30,000 characters

• transit_arrivalsFree

  What is due at a stop and when. Takes a stop name or an id. In London this is live from TfL — buses, tube, DLR, Overground and Elizabeth line. Elsewhere it is the published timetable, and says so

• transit_busesFree

  Where the buses actually are near a point right now — line, where each is heading and how far away, nearest first. England, from the Bus Open Data Service. This is position rather than prediction: it says what is moving, not when it reaches you

• transit_feedsFree

  Which published timetables this instance carries, and which others it could — with the size of each, so an operator can see what switching one on costs. Also names the feeds that look right but whose timetables have run out

• transit_nearbyFree

  Bus stops and stations near a point, nearest first, with the id each one is called by. London live from TfL; elsewhere from whichever published timetables this instance has loaded

• transit_statusFree

  Which lines are delayed, part-suspended or closed right now, and why. London only

• transit_trainsFree

  The live departure or arrival board at a British station, by its three-letter code — KGX, MAN, EDB. Scheduled and expected time, platform, operator and where it is going, plus any disruption notice. From National Rail

• users_findFree

  Look somebody up by username or display name. Use this to turn a name somebody mentioned into an address you can write to

• users_getFree

  One user, by username

• users_listFree

  Everyone on this instance, online first and then newest. Agents are included and marked; an agent account is a user here like any other

• video_listFree

  Read the latest videos from curated channels

• video_readFree

  Read the metadata and description of one video already discovered by this instance. No transcript is available

• video_searchFree

  Search YouTube by keyword using this instance's search quota. Results are not restricted to the curated channels

• wallet_addressFree

  Your own address on Base, to receive USDC. Created the first time you ask. Funds sent on any other chain land at the same address there and cannot be reached from here

• wallet_balanceFree

  What your wallet holds in USDC on Base. Says so plainly when the chain could not be reached, because that is not the same as holding nothing

• weather_airFree

  Air quality at a location right now — AQI, PM2.5, PM10, ozone, nitrogen dioxide, UV index, and pollen where it is counted

• weather_forecastFree

  Get the weather forecast for a location — current conditions, the days ahead, and today's sunrise, sunset and how much daylight is left, which is the fact that decides an afternoon outdoors

• weather_historyFree

  What the weather actually was at a location between two dates — average high and low, total rainfall and the extremes. Records run a few days behind today

• weather_lookupFree

  Look up the weather by town or city name

• weather_marineFree

  Sea state at a coastal or offshore point — wave height, period and direction now and for the days ahead, with sea temperature

• web_fetchFree

  Fetch a web page by URL and return its cleaned readable content, stripping ads, popups and navigation. Needs an account

• web_imagesFree

  Search the web for images, thumbnails and original source pages

• web_searchFree

  Search the web for current information and news

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 947ms20/20
• Tool poisoning156 tool descriptions checked15/15
• Auth qualityopen endpoint exposes 27 write-action tools with no auth3/15
• Maintenancelast push 0 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year; website matches verified namespace10/10

Mu: common questions

Is Mu MCP server safe?

Mostly: it is graded B (84/100). Read the Mu safety report

How do I install Mu?

It runs remotely at micro.mu. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Mu need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Mu maintained?

The last commit was in the last day (2026-09-24). The latest release is v1.0.0.

Is Mu up?

100% of our last 21 checks got an answer. We check remote servers about four times a day.

What can I use instead of Mu?

Servers from other publishers that do the same job: AIquila — Nextcloud MCP Server, iCloud MCP server and Apple Tools (Unified) MCP server. Compare all Mu alternatives.