Country Calling Codes

by Kajdep · remote · no sign-in to list tools · v1.4.0 · published by GitHub user Kajdep

Calling codes, phone analysis, dialing guidance, batch normalization and calling windows.

Changes · 3

Compare Registry entry

11 tools: 3 change things and 8 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things3Claude Code: ask: see these tools
Only reads8Claude Code: allow: see these tools

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

claude mcp add --transport http countrycallingcodesmcp https://www.countrycalling.codes/api/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnlookup_country_calling_code
The server marks "lookup_country_calling_code" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "lookup_country_calling_code" says "lookup": a word for reading.
What this check looks for

Tools

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

11 tools

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

format_international_phone_numberNormalize a phone number into a plausible international format using reviewed country-specific rules.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Normalize a phone number into a plausible international format using reviewed country-specific rules. Processing is ephemeral. This tool does not query carriers, HLR/HSS, MNP databases, or live subscribers.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
lookup_country_calling_codeLook up international country calling codes by free text, ISO code, dial code, or region.1 finding
Why it is in this group
- The name "lookup_country_calling_code" says "lookup": a word for reading.
- The input takes a statement or command to run (input.code), which can change anything it can reach.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "lookup_country_calling_code" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "lookup_country_calling_code" says "lookup": a word for reading.
  What this check looks for
Description, as the server wrote it
Look up international country calling codes by free text, ISO code, dial code, or region. Optionally return reviewed, source-linked dialing examples. This tool does not verify live subscriber numbers.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
normalize_phone_numbersNormalize up to 100 records with unique IDs.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Normalize up to 100 records with unique IDs. Invalid records produce individual errors. Optionally identify canonical duplicate candidates; no contacts are changed or stored.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Only reads 8Looks things up and changes nothing.Claude Code: allow

analyze_phone_numberAnalyze a number using versioned numbering metadata.No findings
Why it is in this group
- The name "analyze_phone_number" says "analyze": a word for reading.
Description, as the server wrote it
Analyze a number using versioned numbering metadata. National numbers need numberCountryCode; exit prefixes need originCountryCode. Reports uncertainty and rule evidence, never live subscriber status.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
compare_phone_numbersCompare two numbers after analysis.No findings
Why it is in this group
- The name "compare_phone_numbers" says "compare": a word for reading.
Description, as the server wrote it
Compare two numbers after analysis. Missing context produces indeterminate. Extensions must match unless extensionPolicy is explicitly ignore; equality does not establish ownership.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
diagnose_dialing_problemExplain formatting issues and propose reviewed prefix repairs for confirmation.No findings
Why it is in this group
- The description's first verb is "explain": a word for reading.
Description, as the server wrote it
Explain formatting issues and propose reviewed prefix repairs for confirmation. Uses the same analyzer. Cannot determine why a network rejected a call.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
find_calling_windowsFind overlapping working hours using explicit IANA time zones and dates.No findings
Why it is in this group
- The name "find_calling_windows" says "find": a word for reading.
Description, as the server wrote it
Find overlapping working hours using explicit IANA time zones and dates. Handles overnight shifts and DST; never infers location from phone numbers or contacts participants.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_dialing_instructionsPrepare origin-specific dialing guidance for reviewed countries.No findings
Why it is in this group
- The name "get_dialing_instructions" says "get": a word for reading.
Description, as the server wrote it
Prepare origin-specific dialing guidance for reviewed countries. Provide origin and destination separately; no phone number returns safe placeholder patterns. Network-dependent results remain conditional.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_phone_capabilitiesDiscover supported countries, per-operation review coverage, evidence, dataset versions and request limits before choosing a phone workflow.No findings
Why it is in this group
- The name "get_phone_capabilities" says "get": a word for reading.
Description, as the server wrote it
Discover supported countries, per-operation review coverage, evidence, dataset versions and request limits before choosing a phone workflow.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_phone_input_rulesGet reviewed display placeholders and trunk-prefix guidance.No findings
Why it is in this group
- The name "get_phone_input_rules" says "get": a word for reading.
Description, as the server wrote it
Get reviewed display placeholders and trunk-prefix guidance. Examples are not validation masks. English fallback and unsupported editorial coverage are explicit.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
resolve_phone_regionResolve a phone number to metadata-backed country candidates or non-geographic numbering.No findings
Why it is in this group
- The name "resolve_phone_region" says "resolve": a word for reading.
Description, as the server wrote it
Resolve a phone number to metadata-backed country candidates or non-geographic numbering. Results are numbering assignments, not current location or carrier.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

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 1.4.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http countrycallingcodesmcp https://www.countrycalling.codes/api/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__countrycallingcodesmcp__get_phone_capabilities",
      "mcp__countrycallingcodesmcp__analyze_phone_number",
      "mcp__countrycallingcodesmcp__get_dialing_instructions",
      "mcp__countrycallingcodesmcp__compare_phone_numbers",
      "mcp__countrycallingcodesmcp__resolve_phone_region",
      "mcp__countrycallingcodesmcp__get_phone_input_rules",
      "mcp__countrycallingcodesmcp__diagnose_dialing_problem",
      "mcp__countrycallingcodesmcp__find_calling_windows"
    ],
    "ask": [
      "mcp__countrycallingcodesmcp__normalize_phone_numbers",
      "mcp__countrycallingcodesmcp__lookup_country_calling_code",
      "mcp__countrycallingcodesmcp__format_international_phone_number"
    ],
    "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 countrycallingcodesmcp. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.Kajdep/countrycallingcodesmcp/changes.xml

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Source: MCP Registry · repository. Synced Oct 21, 2026, 18:17 UTC.

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