MCP MeasureMCP Measure

index observed

eFon international call rates & VoIP

International call & VoIP rates: per-minute prices to call 200+ countries, comparison, dialing help.

Should I use this

Quality & Safety

A
Description quality
100%
Schema completeness
100%
Naming quality
87%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~812Tokens (tool definitions)
~1.5 KBTypical response size
Moderate attention impact (0.63% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "call-rates": {
      "url": "https://efon.com/mcp"
    }
  }
}

Remote endpoints

https://efon.com/mcpstreamable-http

What it can do

Tool inventory

Tools (3)

🟒 Read-only🟑 WriteπŸ”΄ Deleteβšͺ Unknown
🟒get_call_rates(country, language)

Current eFon per-minute prices (EUR and USD) for calling a country: every rate line (mobile / landline / specific networks or regions), the cheapest price, any announced price change, the country page URL and app download links. Rates are the same wherever the caller is. Use this for "how much does it cost to call X", "cheapest way to call X", "international / VoIP call rates to X" or "is calling X from abroad expensive".

Input Schema

{
  "type": "object",
  "properties": {
    "country": {
      "type": "string",
      "description": "Country name in any language, ISO 3166-1 alpha-2 code or dialing code β€” e.g. 'Eritrea', 'ER', 'ЭритрСя', '+291'."
    },
    "language": {
      "type": "string",
      "enum": [
        "en",
        "de",
        "fr",
        "nl",
        "da",
        "sv",
        "nb",
        "es",
        "pt",
        "it",
        "ar",
        "ti",
        "ru"
      ],
      "default": "en",
      "description": "Language for country names and the returned page links."
    }
  },
  "required": [
    "country"
  ]
}
🟒compare_call_rates(countries, language)

Cheapest eFon per-minute price (EUR and USD) for several countries at once, sorted from cheapest to most expensive, each with its country page URL. Use this when the user calls more than one country ("rates to India, Pakistan and Bangladesh", "which is cheaper to call, Mexico or Colombia?").

Input Schema

{
  "type": "object",
  "properties": {
    "countries": {
      "type": "array",
      "items": {
        "type": "string",
        "description": "Country name in any language, ISO 3166-1 alpha-2 code or dialing code β€” e.g. 'Eritrea', 'ER', 'ЭритрСя', '+291'."
      },
      "minItems": 1,
      "maxItems": 20,
      "description": "Up to 20 countries, each in any of the formats above."
    },
    "language": {
      "type": "string",
      "enum": [
        "en",
        "de",
        "fr",
        "nl",
        "da",
        "sv",
        "nb",
        "es",
        "pt",
        "it",
        "ar",
        "ti",
        "ru"
      ],
      "default": "en",
      "description": "Language for country names and the returned page links."
    }
  },
  "required": [
    "countries"
  ]
}
🟒how_to_call(destination, origin, language)

Dialing instructions for calling a destination country from an origin country: exit code, country code, example mobile and landline numbers written the way to dial them, the time difference and the hours when it is daytime on both ends, plus the eFon guide URL and the cheapest eFon rate. Omit origin for the international (+) format only.

Input Schema

{
  "type": "object",
  "properties": {
    "destination": {
      "type": "string",
      "description": "Country name in any language, ISO 3166-1 alpha-2 code or dialing code β€” e.g. 'Eritrea', 'ER', 'ЭритрСя', '+291'."
    },
    "origin": {
      "type": "string",
      "description": "Country the caller is in (optional). Country name in any language, ISO 3166-1 alpha-2 code or dialing code β€” e.g. 'Eritrea', 'ER', 'ЭритрСя', '+291'."
    },
    "language": {
      "type": "string",
      "enum": [
        "en",
        "de",
        "fr",
        "nl",
        "da",
        "sv",
        "nb",
        "es",
        "pt",
        "it",
        "ar",
        "ti",
        "ru"
      ],
      "default": "en",
      "description": "Language for country names and the returned page links."
    }
  },
  "required": [
    "destination"
  ]
}

Community

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Evidence

Recent observations

verifiedversion not recorded3 tools