Heimster MCP server

Which MCP servers are Heimster's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-27

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Whose server it is

Registry namech.heimster/heimsterverified in the MCP registry

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

When we asked itchecked 2026-10-27

Stateanswerschecked 2026-10-27
Tools18
Server calls itselfheimster-public
Server version1.0.0
Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 155 ms.

Should an agent connect itSkip it

Its tools do none of the product's use cases we checked: Turn uploaded blueprints into a branded project website; Calculate a sun score for each unit in listings; Send enquiry replies and follow-ups without manual work.

Once connected

Keep approval on for send_enquiry: they delete, send or pay without saying so.
send_enquiry change data without a sign-in: anyone with the address can call them.
Parameters are untyped or undescribed in 13 of 18 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 8, the first on 2026-10-27

INITE MCP score47 of 100answers 100 · does the job 0 · definitions 88 · context 92 · connects 100 · lowered by the warning signs below
What an agent can do with it0 of 3 use cases
Answered100% of days8 of 8 daily checks
Median first answer469 ms
Space in an agent's context≈ 3,973 tokensthe definitions of all its tools (18), which an agent carries on every turn
Tool definitionsB · 88 of 100
Typed results0 of 18 toolsdeclared outputSchema: results come typed, read once

Parameters without a description: in 13 of 18

What an agent can do with it

cannot · Turn uploaded blueprints into a branded project website
cannot · Calculate a sun score for each unit in listings
cannot · Send enquiry replies and follow-ups without manual work

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

Tools that delete, send or pay, marked as not destructive: send_enquiry
Tools that change data, on a server that answers without a sign-in: send_enquiry

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers18 tools · read 2026-10-27

search_listings
Searches homes and properties in Switzerland – to rent or buy, also by feel (ruhig, sonnig, lebendig/belebt, grün, zentral, familienfreundlich; calme, ensoleillé, animé; tranquillo, vivace) (Wohnung mieten/kaufen, Haus kaufen, WG-Zimmer…
get_listing
Use this to show one listing in full (id from search_listings, a Heimster link, or «found:<id>» for agency-website listings): photos, floor plans, description, costs, location facts, open viewings with ids, and the link. Call it before…
compare_listings
Use this when someone wants to compare two to four listings (vergleichen, comparer, confrontare): price, price per m², rooms, area, floor, availability, public transport, shops and schools nearby, sun score – side by side.
address_facts
Use this for ANY Swiss address, even without a listing – «what is it like to live at …», «is it noisy», «schools/Kita/ÖV near …», «was gibt es rund um …», «quartier calme ?», «com'è la zona …»: the building (year, floors, flats, heating)…
search_new_builds
Use this for new-build homes (Neubau, Erstbezug, Erstvermietung, neuf, nuova costruzione): developments with available units, prices from, rooms and move-in date. Filter by place, rent/sale, rooms and maximum price.
upcoming_construction
Use this when someone asks what is being built or planned in a Swiss municipality or canton (Was wird gebaut, Überbauung, Bauprojekte, nouveaux logements en construction, cantieri): approved and ongoing residential projects with at least…
area_market_facts
Use this for market figures of a Swiss municipality, Kreis or Quartier (Mietpreise, Quadratmeterpreise, Leerstand, Landpreise; prix au m², loyers, taux de vacance; prezzi, affitti, sfitto): condominium and house prices per m², rents per…
property_value_range
Use this when an OWNER asks what their flat or house is worth (Was ist meine Wohnung wert, Marktwert, valeur de mon bien, quanto vale): returns the link to Heimster's free owner valuation for that address (all of Switzerland, about two…
send_enquiry
Use this when someone wants to contact the provider of a listing (anfragen, Kontakt aufnehmen, Besichtigung anfragen, contacter l'agence, contattare): sends the enquiry in their name. Needs their name, e-mail and a short message (phone…
book_viewing
Use this to book a place at an open viewing (Besichtigung buchen, réserver une visite, prenotare una visita) – viewing ids come from get_listing. Needs name, e-mail and number of people. Signed in: booked at once; otherwise after the…
create_search_alert
Use this when someone wants to be notified about new listings (Suchabo, Benachrichtigung, alerte, avviso): e-mails new matching listings for a place, type, rooms, price and area. Needs their e-mail (or a Heimster sign-in). Starts after…
follow_property_value
Use this when an OWNER wants to follow their property's value over time (Wert verfolgen, monatliches Update): returns the link to the free owner valuation – after it the owner follows the value monthly in their Heimster account.
owner_enquiry
Use this when an OWNER anywhere in Switzerland wants to sell, let or value a property, or wants a broker (Haus/Wohnung verkaufen, vermieten, Makler gesucht, bewerten lassen; vendre, louer, agence immobilière; vendere, affittare): the…
my_applications
Use this when someone asks about their own applications or purchase interests on Heimster (meine Bewerbungen, Stand meiner Bewerbung, mes candidatures): status and links. Call it directly – if the person is not signed in, the app shows…
apply_for_listing
Use this to apply for a RENTAL listing with the person's Heimster application profile (bewerben, sich bewerben, postuler, candidarsi). Call it directly once they confirm – if they are not signed in, the app shows the Heimster sign-in…
register_purchase_interest
Use this to register interest in a property FOR SALE with the agent (Kaufinteresse anmelden, kaufen möchten, intérêt d'achat, interesse all'acquisto). Optional: phone, a message and the financing status (unknown, self_funded, confirmed…
search
Free-text search over Heimster listings and new-build projects. Returns ids for fetch.
fetch
Full text of a result from search (id like «listing:<uuid>» or «project:<slug>»).

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "heimster": {
      "type": "http",
      "url": "https://heimster.ch/mcp/public"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http heimster https://heimster.ch/mcp/public

Add to Cursor Add to VS Code

claude.ai, ChatGPT and other clients: add https://heimster.ch/mcp/public as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.