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1820.ch – Telefonbuch Schweiz

by 1820.ch · remote · no sign-in to list tools · v1.0.1 · published by ch.1820

Swiss phone directory: search people and businesses, reverse number lookup, business categories.

Read only
CompareRegistry entry

4 tools: 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http telefonbuch https://mcp.1820.ch/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Only reads 4Claude Code: allow
  • browse_business_categoryLists public directory entries in one business category, optionally narrowed to a locality/postcode/canton.No findings

    Why it is in this group

    • The name "browse_business_category" says "browse": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • idempotentHint: true
    • readOnlyHint: true
    • title: Browse a business category
  • get_directory_entryFetches 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.No findings

    Why it is in this group

    • The name "get_directory_entry" says "get": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • idempotentHint: true
    • readOnlyHint: true
    • title: Get a directory entry
  • reverse_phone_lookupLooks up the public directory entry (or entries) associated with a Swiss phone number.No findings

    Why it is in this group

    • The name "reverse_phone_lookup" says "lookup": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • idempotentHint: true
    • readOnlyHint: true
    • title: Reverse phone lookup
  • search_swiss_directoryFull-text search over the Swiss public phone/business directory (1820.ch).No findings

    Why it is in this group

    • The name "search_swiss_directory" says "search": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • idempotentHint: true
    • readOnlyHint: true
    • title: Search the Swiss directory

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http telefonbuch https://mcp.1820.ch/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__telefonbuch__browse_business_category",
      "mcp__telefonbuch__get_directory_entry",
      "mcp__telefonbuch__reverse_phone_lookup",
      "mcp__telefonbuch__search_swiss_directory"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as telefonbuch. Review it before you use it.