eFon MCP server

Which servers in the official MCP registry are eFon's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-18

← Back to eFon

Whose server it is

Registry namecom.efon/call-ratesverified in the MCP registry

The registry name sits under efon.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-18

Stateanswerschecked 2026-10-18
Tools4
Server calls itselfcom.efon/call-rates
Server version1.2.0
Protocol version2025-06-18

On 2026-10-18 the server answered initialize and tools/list without a sign-in. First answer in 157 ms.

Tools it offers4 tools · read 2026-10-18

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, the country page URL and app download links. Rates are…
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 more than one country ("rates to India, Pakistan and…
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 difference and the hours when it is daytime on both ends…
lookup_calling_code
Reverse lookup of an international dialing code: which country (or countries, for shared codes like +1, +7 or +44) a code such as +36, 0036 or +1 876 belongs to, with capital, example number and the eFon rate page. Use this for "which…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

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

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.