{"$schema":"https://verifymcp.io/schemas/trust-report.json","schemaVersion":1,"license":{"name":"CC BY-NC 4.0","url":"https://creativecommons.org/licenses/by-nc/4.0/"},"generatedAt":"2026-11-07T19:08:13.116Z","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp","markdownUrl":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp.md","server":{"slug":"ch-1820-telefonbuch","name":"1820.ch – Telefonbuch Schweiz","registryName":"ch.1820/telefonbuch","description":"Swiss phone directory: search people and businesses, reverse number lookup, business categories.","registryStatus":"active","deletedAt":null,"statusMessage":null,"liveness":"live","publisher":{"class":"unknown","claimed":false}},"component":{"slug":"mcp","type":"remote","identifier":"https://mcp.1820.ch/mcp","withdrawn":false,"url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp","version":"1.0.1","transport":null,"scoredAt":"2026-11-07T05:37:28.107Z"},"score":{"total":85,"tier":"high trust","status":"scored","weekDelta":0,"history":[{"date":"2026-11-07","total":85},{"date":"2026-11-06","total":85},{"date":"2026-11-05","total":85},{"date":"2026-11-04","total":85},{"date":"2026-11-03","total":85},{"date":"2026-11-02","total":85},{"date":"2026-11-01","total":85},{"date":"2026-10-31","total":85},{"date":"2026-10-30","total":85},{"date":"2026-10-29","total":85},{"date":"2026-10-28","total":85},{"date":"2026-10-27","total":85},{"date":"2026-10-26","total":85},{"date":"2026-10-25","total":84},{"date":"2026-10-24","total":84},{"date":"2026-10-23","total":83},{"date":"2026-10-22","total":83},{"date":"2026-10-21","total":82},{"date":"2026-10-20","total":82},{"date":"2026-10-19","total":81},{"date":"2026-10-18","total":81},{"date":"2026-10-17","total":80},{"date":"2026-10-16","total":80},{"date":"2026-10-15","total":80},{"date":"2026-10-14","total":79},{"date":"2026-10-13","total":79},{"date":"2026-10-12","total":78},{"date":"2026-10-10","total":77},{"date":"2026-10-09","total":77},{"date":"2026-10-06","total":75}]},"categories":[{"name":"Endpoint Security","score":74,"verdict":"fail","reasons":["The endpoint's TLS certificate is valid, in date, and uses a strong key.","No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation.","HTTPS is enforced; there's no plaintext access path.","HSTS check failed: the Strict-Transport-Security header is absent.","DNSSEC check failed: this domain isn't protected by DNSSEC."],"codes":[{"code":"tls.valid","args":{}},{"code":"auth.none_no_destructive","args":{}},{"code":"https.enforced","args":{}},{"code":"headers.hsts_absent","args":{}},{"code":"dnssec.absent","args":{}}]},{"name":"Transport & Reachability","score":100,"verdict":"pass","reasons":["Verified streamable-http transport via a live MCP handshake."],"codes":[{"code":"transport.verified","args":{"transport":"streamable-http"}}]},{"name":"Schema Quality & AI Usability","score":75,"verdict":"fail","reasons":["AI-judged instruction clarity (excellent).","Context-footprint check failed: tool/resource definitions use about 660 tokens (~165/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.","Usage-examples check failed: none of the tools include examples."],"codes":[{"code":"schema.ai_quality","args":{"band":"excellent"}},{"code":"schema.footprint_heavy","args":{"avg":"165","items":"4","tools":"4","tokens":"660","resources":"0"}},{"code":"schema.examples_absent","args":{}}]},{"name":"Stability & Change Management","score":100,"verdict":"pass","reasons":["No destabilizing schema changes in the last 30 days."],"codes":[{"code":"stability.stable","args":{}}]},{"name":"Tool Coverage","score":100,"verdict":"pass","reasons":["100% of tools have a non-trivial description (not blank, and not just the tool's name).","100% of tool parameters carry a description.","Structured output schemas are declared (100% of tools); any adoption earns full credit."],"codes":[{"code":"toolquality.descriptions","args":{"pct":"100"}},{"code":"toolquality.param_docs","args":{"pct":"100"}},{"code":"toolquality.output_present","args":{"pct":"100"}}]},{"name":"Tool Safety","score":100,"verdict":"pass","reasons":["No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.","We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.","An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it."],"codes":[{"code":"toolsafety.injection_clean","args":{}},{"code":"toolsafety.destructive_none","args":{"tools":"4"}},{"code":"toolsafety.manipulation_clean","args":{"units":"4","judged":"4"}}]},{"name":"Capabilities","score":100,"verdict":"pass","reasons":["Implements a current MCP spec version (2026-07-28)."],"codes":[{"code":"protocol.current","args":{"version":"2026-07-28"}}]}],"inconclusive":[],"malware":[],"components":[{"slug":"mcp","type":"remote","identifier":"https://mcp.1820.ch/mcp","withdrawn":false,"score":85,"current":true,"url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp","markdownUrl":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp.md"}],"facts":[{"label":"Endpoint","value":"https://mcp.1820.ch/mcp"},{"label":"Transports","value":"streamable-http"},{"label":"Auth","value":"none"},{"label":"Version","value":"1.0.1"}],"install":{"available":true,"bundleSha256":null},"tools":[{"name":"browse_business_category","title":"Browse a business category","description":"Lists public directory entries in one business category, optionally narrowed to a locality/postcode/canton. Use search_swiss_directory instead for a free-text query.","inputs":[{"name":"category","type":"string","required":true,"description":"The business category slug (e.g. \"restaurant\", \"coiffeur\", \"sanitaer\"). Valid slugs are the slug values in categories, as returned by get_directory_entry, or a top-level group slug such as \"bau-handw…"},{"name":"lang","type":"string","required":false,"description":"Response language: de, fr, it, or en. Defaults to de."},{"name":"limit","type":"integer","required":false,"description":"Maximum number of results, 1-20."},{"name":"location","type":"string","required":false,"description":"Locality, postcode, or canton (e.g. \"Baden\", \"5400\", \"ZH\") to narrow the category to. Always put a place name here."}],"outputs":[{"name":"advertising_block_note","type":"string","required":true,"description":null},{"name":"results","type":"null|array","required":true,"description":null},{"name":"retrieved_at","type":"string","required":true,"description":null},{"name":"source","type":"object","required":true,"description":null}],"hasOutputSchema":true,"hasExamples":false,"tokenEstimate":176},{"name":"get_directory_entry","title":"Get a directory entry","description":"Fetches the full public detail for one directory entry by its entry_id (public_id), including phone numbers, opening hours, and links when the entry has them. Use get_directory_entry for phone numbers and opening hours; use search_swiss_directory or browse_business_category to find an entry_id first.","inputs":[{"name":"entry_id","type":"string","required":true,"description":"The entry's public_id, as returned by search_swiss_directory, browse_business_category, or reverse_phone_lookup."},{"name":"lang","type":"string","required":false,"description":"Response language: de, fr, it, or en. Defaults to de."}],"outputs":[{"name":"advertising_block_note","type":"string","required":true,"description":null},{"name":"entry","type":"object","required":true,"description":null},{"name":"retrieved_at","type":"string","required":true,"description":null},{"name":"source","type":"object","required":true,"description":null}],"hasOutputSchema":true,"hasExamples":false,"tokenEstimate":121},{"name":"reverse_phone_lookup","title":"Reverse phone lookup","description":"Looks up the public directory entry (or entries) associated with a Swiss phone number. Accepts national (\"079 123 45 67\"), E.164 (\"+41791234567\"), or compact notation. Returns an empty result list when the number has no findable public listing.","inputs":[{"name":"lang","type":"string","required":false,"description":"Response language: de, fr, it, or en. Defaults to de."},{"name":"phone_number","type":"string","required":true,"description":"The phone number to look up, in any common Swiss notation (national, E.164, or compact)."}],"outputs":[{"name":"results","type":"null|array","required":true,"description":null},{"name":"retrieved_at","type":"string","required":true,"description":null},{"name":"source","type":"object","required":true,"description":null}],"hasOutputSchema":true,"hasExamples":false,"tokenEstimate":118},{"name":"search_swiss_directory","title":"Search the Swiss directory","description":"Full-text search over the Swiss public phone/business directory (1820.ch). Matches ALL words in query, so a short keyword works best; put any place name in location, not query. For \"business type X in place Y\", browse_business_category with a category slug is an alternative. Use get_directory_entry for phone numbers and opening hours of a specific result.","inputs":[{"name":"entry_type","type":"string","required":false,"description":"Restrict results to person, business, or all entries."},{"name":"lang","type":"string","required":false,"description":"Response language: de, fr, it, or en. Defaults to de."},{"name":"limit","type":"integer","required":false,"description":"Maximum number of results, 1-20."},{"name":"location","type":"string","required":false,"description":"Locality, postcode, or canton (e.g. \"Baden\", \"5400\", \"ZH\") to narrow the search. Always put a place name here, never in query."},{"name":"query","type":"string","required":true,"description":"One short keyword: a person's or company name, or ONE business type (e.g. \"Müller\", \"Migros\", \"Coiffeur\"). Every word must match, so no sentences or extra adjectives. Never put a place name here — us…"}],"outputs":[{"name":"advertising_block_note","type":"string","required":true,"description":null},{"name":"results","type":"null|array","required":true,"description":null},{"name":"retrieved_at","type":"string","required":true,"description":null},{"name":"source","type":"object","required":true,"description":null}],"hasOutputSchema":true,"hasExamples":false,"tokenEstimate":245}],"toolsTruncatedAtCapture":false,"diagnostics":{"capturedAt":"2026-11-07T05:37:28.000Z","track":"remote","endpoint":"https://mcp.1820.ch/mcp","declaredUrl":null,"truncated":false,"tls":{"outcome":"valid","label":"Valid","version":"TLS 1.3","cipherSuite":"TLS_AES_128_GCM_SHA256","chainError":null,"certificates":[{"subject":"CN=1820.ch","issuer":"CN=WE1,O=Google Trust Services,C=US","notBefore":"2026-09-18T10:54:47Z","notAfter":"2026-12-17T11:52:36Z","keyType":"ECDSA","keyBits":256,"isCa":false},{"subject":"CN=WE1,O=Google Trust Services,C=US","issuer":"CN=GTS Root R4,O=Google Trust Services LLC,C=US","notBefore":"2023-12-13T09:00:00Z","notAfter":"2029-02-20T14:00:00Z","keyType":"ECDSA","keyBits":256,"isCa":true},{"subject":"CN=GTS Root R4,O=Google Trust Services LLC,C=US","issuer":"CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE","notBefore":"2023-11-15T03:43:21Z","notAfter":"2028-01-28T00:00:42Z","keyType":"ECDSA","keyBits":384,"isCa":true}]},"dnssec":{"result":"insecure","label":"Not signed","name":"mcp.1820.ch.","steps":[{"zone":".","outcome":"verified","label":"Verified"},{"zone":"ch.","outcome":"verified","label":"Verified"},{"zone":"1820.ch.","outcome":"insecure_proven","label":"Unsigned (proven)"}]},"auth":{"outcome":"none","label":"No authorisation required","gate":null,"gateLabel":null,"status":200,"authorizationServers":[]},"httpsRedirect":{"outcome":"https_enforced","label":"HTTPS enforced","status":301},"transports":[{"transport":"streamable-http","outcome":"verified","label":"Verified","status":200,"followed":false}],"provenance":null,"installScripts":[],"installScriptsTotal":null,"vulnerabilities":[],"vulnerabilitiesTotal":null,"dependencies":null},"mismatches":[],"changelog":{"trackingSince":"2026-09-27","recent":[{"id":"chg_01a1af60-7c1a-7b7c-a1b1-abab246aaf07","kind":"score.rubric_changed","summary":"We updated how we score, so this day's move reflects our rubric, not a change to the server","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-11-06","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a1af60-7c1a-7b7c-a1b1-abab246aaf07"},{"id":"chg_01a17bd5-7a58-7e55-b7ac-0ee72390b0ff","kind":"check.verdict","summary":"Stability (0.97 → pass)","materiality":"security","direction":"neutral","scoreDelta":null,"occurredOn":"2026-10-27","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a17bd5-7a58-7e55-b7ac-0ee72390b0ff"},{"id":"chg_01a176b1-6646-7d06-bc66-fc90409b5e08","kind":"score.total_changed","summary":"Trust score (84 → 85)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-26","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a176b1-6646-7d06-bc66-fc90409b5e08"},{"id":"chg_01a16c63-de5b-7d50-a725-11b5955ea841","kind":"score.total_changed","summary":"Trust score (83 → 84)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-24","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a16c63-de5b-7d50-a725-11b5955ea841"},{"id":"chg_01a16217-5f8a-78c2-ae0d-e5395825e7c9","kind":"score.total_changed","summary":"Trust score (82 → 83)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-22","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a16217-5f8a-78c2-ae0d-e5395825e7c9"},{"id":"chg_01a157ca-6422-76a5-b382-59e22e09685f","kind":"score.total_changed","summary":"Trust score (81 → 82)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-20","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a157ca-6422-76a5-b382-59e22e09685f"},{"id":"chg_01a14d87-83a2-7cac-ba68-e89bb355fd5d","kind":"score.total_changed","summary":"Trust score (80 → 81)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-18","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a14d87-83a2-7cac-ba68-e89bb355fd5d"},{"id":"chg_01a13e07-a066-7bea-a8c4-7ee7669be794","kind":"score.total_changed","summary":"Trust score (79 → 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77)","materiality":"functional","direction":"improvement","scoreDelta":2,"occurredOn":"2026-10-09","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a1214b-6a28-77e1-92d6-478be3613313"},{"id":"chg_01a10fb0-628f-7736-8c7a-591386b428cc","kind":"score.total_changed","summary":"Trust score (74 → 75)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-06","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a10fb0-628f-7736-8c7a-591386b428cc"},{"id":"chg_01a1003f-77b6-7efc-bd55-3083e3d6a9e9","kind":"score.total_changed","summary":"Trust score (73 → 74)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-10-03","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a1003f-77b6-7efc-bd55-3083e3d6a9e9"},{"id":"chg_01a0f0d7-88d4-79f2-82d1-6ea61ea3abc3","kind":"score.total_changed","summary":"Trust score (72 → 73)","materiality":"functional","direction":"improvement","scoreDelta":1,"occurredOn":"2026-09-30","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a0f0d7-88d4-79f2-82d1-6ea61ea3abc3"},{"id":"chg_01a0e688-e7fd-7ddc-9b33-3b444813b40e","kind":"score.rubric_changed","summary":"We updated how we score, so this day's move reflects our rubric, not a change to the server","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-09-28","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a0e688-e7fd-7ddc-9b33-3b444813b40e"},{"id":"chg_01a0e406-601c-703c-a50d-5a90b6343822","kind":"score.first_scored","summary":"First indexed and scored","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-09-27","url":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp#chg-chg_01a0e406-601c-703c-a50d-5a90b6343822"}],"truncated":false,"feedUrl":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp/changelog.json"},"links":{"html":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp","markdown":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp.md","changelogJson":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp/changelog.json","changelogRss":"https://verifymcp.io/servers/ch-1820-telefonbuch/mcp.xml","external":[{"label":"Remote endpoint","href":"https://mcp.1820.ch/mcp"},{"label":"Website","href":"https://1820.ch/ch/de/ki-assistenten"}]}}