eFon — International Call Rates & VoIP

Live per-minute prices for international calls and cheap VoIP calls abroad with eFon — a pay-as-you-go app for iOS and Android that calls mobiles and…

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What it can do

  • Get Call Rates: 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,
  • Compare Call Rates: 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 mor
  • How To Call: 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 differen

What data it sees

Do you need an account

No: the server works without sign-in

Live per-minute prices for international calls and cheap VoIP calls abroad with eFon — a pay-as-you-go app for iOS and Android that calls mobiles and landlines in 200+ countries, with no subscription and no connection fees. A simple alternative to Skype credit, calling cards and expensive operator roaming rates.

Tools

  • get_call_rates — current eFon rates (EUR and USD) for calling any country: every rate line, the cheapest price, announced price changes, the country page and app links.
  • compare_call_rates — compare call prices to up to 20 countries at once, cheapest first.
  • how_to_call — how to dial any country from any other: exit code, example mobile and landline numbers, time difference and good hours to call.

Countries can be given in any language, as an ISO code or as a dialing code (India, MX, Nigeria, +44). Read-only, free, no API key needed.

Try: "How much is a call to India from the US?", "Compare rates to Pakistan, Bangladesh and Nepal", "How do I dial a UK number from Germany?"

How to connect

How to connect eFon — International Call Rates & VoIP to Claude

The server address to paste into Claude settings:

https://call-rates--contact-0kf2.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect eFon — International Call Rates & VoIP to ChatGPT

The server address to paste into ChatGPT settings:

https://call-rates--contact-0kf2.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect eFon — International Call Rates & VoIP to Cursor

The server address to paste into Cursor settings:

https://call-rates--contact-0kf2.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (3)

Raw names from tools/list. Only developers need these.

get_call_ratesCurrent 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".
compare_call_ratesCheapest 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?").
how_to_callDialing 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.