MCP Bill of Materials
A machine-readable inventory of what this server exposes and depends on: tools with their effects, transports, packages, findings and provenance (schema version 1.0). Third-party text in it is escaped. Also available from the REST API at /api/v1/servers/92aee96f-eb16-4d6c-bfe9-2a97b52a3a1a/mcbom.
MCP Bill of Materials
root{21}
schema_version: "1.0"
bom_format: "squatch-mcbom"
generator{3}
name: "squatch-mcp"
classifier_version: "rules_v1@2026-10-11.1"
unicode_version: "18.0.0"
server{7}
name: "ch.heimster/heimster"
title: "Heimster – Swiss homes"
description: "Swiss homes to rent or buy, with walking distances, noise, sun and commute times for any address."
version: "1.0.0"
homepage_url: "https://heimster.ch/chatgpt"
source: "official_registry"
upstream_status: "active"
publisher{4}
namespace: "ch.heimster"
display_name: "ch.heimster"
type: "registry_namespace"
status: "unclaimed"
organization: null
repository: null
packages[0]
transports[1]
0{5}
kind: "remote"
type: "streamable-http"
endpoint_url: "https://heimster.ch/mcp/public"
endpoint_host: "heimster.ch"
auth_type: "none"
auth{3}
type: "none"
authorization_servers[0]
scopes[0]
protocol{4}
era: "legacy"
negotiated_version: "2025-11-25"
supported_versions[0]
transport_type: "streamable-http"
tools[18]
0{9}
name: "address_facts"
title: "Everything about an address"
effect: "UNKNOWN"
effect_confidence: 0.2
capabilities[1]
0{2}
capability: "LOCATION"
confidence: 0.618
risk_severity: "LOW"
fingerprint: "46e36740d9d3d0772e4f0fc501a68cfd16936029c415ed52f9c8d547537951d6"
input_schema_fingerprint: "0419d77ae4d83ac5275e054775d86e81e725dd7352540f80e1956ebf28546985"
annotations{5}
title: "Everything about an address"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
1{9}
name: "apply_for_listing"
title: "Apply for a rental"
effect: "WRITE"
effect_confidence: 0.944
capabilities[1]
0{2}
capability: "PERSONAL_DATA"
confidence: 0.74
risk_severity: "LOW"
fingerprint: "4910ea5bf24a7fbf4959c59a6788592234cf6ddf08e0504d2e993d396396a5e3"
input_schema_fingerprint: "c1379abdec90b45e2bd5bc8d2b1a09692cafa416f3cbb81dfcbb3cb51222fdd7"
annotations{5}
title: "Apply for a rental"
readOnlyHint: false
destructiveHint: false
idempotentHint: false
openWorldHint: true
2{9}
name: "area_market_facts"
title: "Property market figures of an area"
effect: "UNKNOWN"
effect_confidence: 0.2
capabilities[0]
risk_severity: "LOW"
fingerprint: "47c3a1e82c5bc6edb04f97a83666396f76eff6c00513f9b6c33651300cf05146"
input_schema_fingerprint: "2392bee9c1c1ee7d2596e3f4399e4d2090305c2e585843861cd8fd459877dd9d"
annotations{5}
title: "Property market figures of an area"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
3{9}
name: "book_viewing"
title: "Book a viewing"
effect: "WRITE"
effect_confidence: 0.762
capabilities[1]
0{2}
capability: "PERSONAL_DATA"
confidence: 0.695
risk_severity: "LOW"
fingerprint: "9bbe0efcbf64df3102c4eaf7753c9d011af66b64d918dd47438a2481bfcae7cd"
input_schema_fingerprint: "cef613f1e5dd010578b62b01d13bed52190bad89320b8a21c2d05f13f63c050b"
annotations{5}
title: "Book a viewing"
readOnlyHint: false
destructiveHint: false
idempotentHint: false
openWorldHint: true
4{9}
name: "compare_listings"
title: "Compare listings"
effect: "READ"
effect_confidence: 0.857
capabilities[0]
risk_severity: "INFO"
fingerprint: "925ae1cdfbe06862ec342bc15d078f34bb842c3951670767d68a1471b396b8e4"
input_schema_fingerprint: "aab61f99ca58fba9b7adf31749ff916602d7e67058e47369ba3417b50e2041af"
annotations{5}
title: "Compare listings"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
5{9}
name: "create_search_alert"
title: "Create a search alert"
effect: "WRITE"
effect_confidence: 0.848
capabilities[2]
0{2}
capability: "EMAIL"
confidence: 0.74
1{2}
capability: "PERSONAL_DATA"
confidence: 0.779
risk_severity: "MEDIUM"
fingerprint: "12f81b33d7dc82b4d1fa00b2e7d57b229df18aaf40e9a7948350939bd8c366f7"
input_schema_fingerprint: "58f6b76b8fc2ed95ff066821f8f75ba52ecd82139b02bdf20f5b518fdfc46c5c"
annotations{5}
title: "Create a search alert"
readOnlyHint: false
destructiveHint: false
idempotentHint: false
openWorldHint: true
6{9}
name: "fetch"
title: "Fetch a Heimster document"
effect: "READ"
effect_confidence: 0.857
capabilities[0]
risk_severity: "INFO"
fingerprint: "a222199a0fe869b66b2734f6275a77ef18179239148fd8166bb33f2684b3d0e8"
input_schema_fingerprint: "7717dd85c2e5ff939b47bf9369acc9c59e449e42f2f3bff74058dcd2eea9242d"
annotations{5}
title: "Fetch a Heimster document"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
7{9}
name: "follow_property_value"
title: "Follow a property's value"
effect: "WRITE"
effect_confidence: 0.79
capabilities[0]
risk_severity: "LOW"
fingerprint: "72c4277e2b65046ac103f1ae7475156c746fe3472ef9ba3ab0a921ae42a81250"
input_schema_fingerprint: "55bca7b3550b13299e84f3cd150577fe4982291053f035396df13f902cc55a79"
annotations{5}
title: "Follow a property's value"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
8{9}
name: "get_listing"
title: "Listing details"
effect: "READ"
effect_confidence: 0.933
capabilities[0]
risk_severity: "INFO"
fingerprint: "affdc610b7518e90ae62c1b792b64ce698169a4a994efa08353ec90164620ad4"
input_schema_fingerprint: "e3fd0760c88f648993dc9d250d7c46adcd137ca4ce5448b1ad7fd5e47bea3f17"
annotations{5}
title: "Listing details"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
9{9}
name: "my_applications"
title: "My applications"
effect: "READ"
effect_confidence: 0.422
capabilities[0]
risk_severity: "INFO"
fingerprint: "268db098baa8883e293f11cc4f21ed5a8feb8ac2b3050e94cc632f4940c03c0b"
input_schema_fingerprint: "b50d881950cb7f37655794c539929fb90aeb3ae288aa9787fbf9e51a96d7033c"
annotations{5}
title: "My applications"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
10{9}
name: "owner_enquiry"
title: "Owner: sell, let or value a property"
effect: "UNKNOWN"
effect_confidence: 0.15
capabilities[1]
0{2}
capability: "PERSONAL_DATA"
confidence: 0.767
risk_severity: "LOW"
fingerprint: "77586cdf1dfe137b5ea76d06f45b3ca11f9fdbf8a29cce9ec6ddf728b3745305"
input_schema_fingerprint: "eb1517e3c638bf2019a087834de6c9f99ed4c7f3fdca2a80b34d33b69d7bba24"
annotations{5}
title: "Owner: sell, let or value a property"
readOnlyHint: false
destructiveHint: false
idempotentHint: false
openWorldHint: true
11{9}
name: "property_value_range"
title: "Value of a property (owner valuation)"
effect: "READ"
effect_confidence: 0.32
capabilities[0]
risk_severity: "INFO"
fingerprint: "3bcaf45aa0d45981ed7f8b685c44e94e1c5f394c1444ea659101b5d0601c0768"
input_schema_fingerprint: "00b6ec3bcdab6fe9c21fe7920af7bf3e59f75c4be4f78b3e824990e44a4d3086"
annotations{5}
title: "Value of a property (owner valuation)"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
12{9}
name: "register_purchase_interest"
title: "Register purchase interest"
effect: "WRITE"
effect_confidence: 0.902
capabilities[1]
0{2}
capability: "FINANCIAL_TRANSACTION"
confidence: 0.675
risk_severity: "HIGH"
fingerprint: "32156e5faa989548ccf2cb7eeac0b78e6835f90a8f79487a431919d219ead4fc"
input_schema_fingerprint: "675253b6d1e1276fe0cfd4c2d621a35768f3e233136cc470ace7f1988af31129"
annotations{5}
title: "Register purchase interest"
readOnlyHint: false
destructiveHint: false
idempotentHint: false
openWorldHint: true
13{9}
name: "search"
title: "Search Heimster"
effect: "READ"
effect_confidence: 0.879
capabilities[0]
risk_severity: "INFO"
fingerprint: "c4bbe887551f9afe9dda2f07bba0314598f12cc70f08f7505ed476f7adb7e3df"
input_schema_fingerprint: "10798ac8d2df2a3150d204e10be2e4fb12cc89650fb68e3a6d3b4b38e1914e26"
annotations{5}
title: "Search Heimster"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
14{9}
name: "search_listings"
title: "Search homes on Heimster"
effect: "READ"
effect_confidence: 0.921
capabilities[0]
risk_severity: "INFO"
fingerprint: "ed40911eb1234f3604ee465eccad2b0b619e304074fed8d8094b6b977fc115d7"
input_schema_fingerprint: "0a3d0fe3e84f7d44fce7d81f40fadcd933495de3288e597b9b6f0fb0be732409"
annotations{5}
title: "Search homes on Heimster"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: true
15{9}
name: "search_new_builds"
title: "New-build projects"
effect: "WRITE"
effect_confidence: 0.762
capabilities[1]
0{2}
capability: "SOURCE_CODE"
confidence: 0.586
risk_severity: "MEDIUM"
fingerprint: "9f82bc554b01e08a92016592fdb15467e504d16f6f416aacb8a625ac8d49a9e4"
input_schema_fingerprint: "cf1d6dcff8557f0d6843cc53b7a41af4d26bd1a4c7fdf641f97d4642278ae967"
annotations{5}
title: "New-build projects"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
16{9}
name: "send_enquiry"
title: "Send an enquiry"
effect: "WRITE"
effect_confidence: 0.822
capabilities[4]
0{2}
capability: "EMAIL"
confidence: 0.695
1{2}
capability: "EXTERNAL_COMMUNICATION"
confidence: 0.641
2{2}
capability: "MESSAGING"
confidence: 0.641
3{2}
capability: "PERSONAL_DATA"
confidence: 0.947
risk_severity: "MEDIUM"
fingerprint: "e16beb50f7a5bdf0b8faf6b461432e3fd56d783edbd086143db87a4d7a6d0e25"
input_schema_fingerprint: "e9172c5754d052638ba28390a7511140eb3fd563385356952a71ad6e258bc0a5"
annotations{5}
title: "Send an enquiry"
readOnlyHint: false
destructiveHint: false
idempotentHint: false
openWorldHint: true
17{9}
name: "upcoming_construction"
title: "Housing under construction («Bald hier»)"
effect: "READ"
effect_confidence: 0.32
capabilities[0]
risk_severity: "INFO"
fingerprint: "1a9f432a596549c90310066346226a15dec2ce3290b5af6d3c5c33e3ec8ff3c5"
input_schema_fingerprint: "7494e16f79de5669cd5dc6a0ce8e8daffff33d90af8bf1eae185b1d35c0aa0cd"
annotations{5}
title: "Housing under construction («Bald hier»)"
readOnlyHint: true
destructiveHint: false
idempotentHint: true
openWorldHint: false
resources[2]
0{4}
key: "ui://heimster/results.v3.html"
kind: "resource"
mime_type: "text/html;profile=mcp-app"
fingerprint: "c998ba564c35fa6f67ea5a79f809a76b537f93fb504181ce1e1845adab6876b6"
1{4}
key: "ui://heimster/results.v3.skybridge.html"
kind: "resource"
mime_type: "text/html+skybridge"
fingerprint: "bd703c434e24fb45ba026172f3b4684df144418c89f47863117d5cee8d4071c4"
prompts[0]
extensions[0]
data{6}
privacy_completeness: "not_provided"
data_categories[0]
ai_training: null
retention_policy: null
processing_regions[0]
subprocessors[0]
external_integrations[1]
0{3}
host: "heimster.ch"
registrable_domain: "heimster.ch"
source: "transport"
findings[8]
0{6}
check_id: "SQ-CONFORMANCE-MODERN-FAILURE"
category: "conformance"
severity: "LOW"
title: "Protocol conformance checks failed"
subject_type: "server"
subject_name: null
1{6}
check_id: "SQ-REPO-MISSING"
category: "provenance"
severity: "LOW"
title: "No source repository linked"
subject_type: "server"
subject_name: null
2{6}
check_id: "SQ-SERVER-AUTH-NONE-WRITE"
category: "authentication"
severity: "HIGH"
title: "State-changing tools available without authentication"
subject_type: "server"
subject_name: null
3{6}
check_id: "SQ-TOOL-ANNOTATION-UNDERCLAIM"
category: "annotations"
severity: "MEDIUM"
title: "Annotations understate what the tool does"
subject_type: "tool"
subject_name: "follow_property_value"
4{6}
check_id: "SQ-TOOL-ANNOTATION-UNDERCLAIM"
category: "annotations"
severity: "MEDIUM"
title: "Annotations understate what the tool does"
subject_type: "tool"
subject_name: "search_new_builds"
5{6}
check_id: "SQ-TOOL-META-INSUFFICIENT"
category: "tool_design"
severity: "LOW"
title: "Description too thin to determine behavior"
subject_type: "tool"
subject_name: "address_facts"
6{6}
check_id: "SQ-TOOL-META-INSUFFICIENT"
category: "tool_design"
severity: "LOW"
title: "Description too thin to determine behavior"
subject_type: "tool"
subject_name: "area_market_facts"
7{6}
check_id: "SQ-TOOL-META-INSUFFICIENT"
category: "tool_design"
severity: "LOW"
title: "Description too thin to determine behavior"
subject_type: "tool"
subject_name: "owner_enquiry"
trust{9}
registry_namespace: "verified_upstream"
publisher_identity: "unverified"
organization: "unverified"
domain: "unverified"
repository: "not_provided"
source_provenance: "unknown"
security_scan: "findings_detected"
privacy_transparency: "not_provided"
monitoring: "active"
provenance{4}
registry_name: "ch.heimster/heimster"
registry_content_sha256: "a6bc0c167d14696461688420e4a9d7fe546f29e441ee93dc682a621009e23d84"
scan_snapshot_fingerprint: "ac3f1b685300cbb4f9fd5f682cd5a078266a17e222f6cc8a7259de26f85fd4a2"
scanner_version: "1.0.0"
timestamps{4}
generated_at: "2026-11-15T05:47:20.718Z"
observed_at: "2026-11-13T00:22:26.36+00:00"
registry_published_at: "2026-10-10T13:55:42.045781+00:00"
registry_updated_at: null