# Efon Call Rates MCP server

Source: https://glimind.com/server/mcp-registry%2Fcom.efon%2Fcall-rates
Registry id: `mcp-registry/com.efon/call-rates`
Status: live (checked 2026-10-27T12:51:29.574Z)

## Verdict

Efon Call Rates MCP server answered 99.62% of Glimind's liveness checks over 30 days, better than 18% of MCP servers, with 778 ms median handshake and 5 outages in 90 days. Its agent-readiness grade is A (96/100) across 4 tools, costing an agent about 1,021 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 99.62% | 18% of MCP servers |
| Median handshake latency | 778 ms | 25% of MCP servers |
| p95 handshake latency | 4072 ms | — |
| Checks in 30 days | 4,781 | — |
| Outages, 90 days | 5 | — |
| Median recovery | 26.1 h | — |
| Agent-readiness score | 96/100 (A) | 82% of MCP servers |
| Tools | 4 | — |
| Tool-list size for an agent | ~1,021 tokens | 72% of MCP servers |
| Days observed | 29 | — |

## Install

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

Claude Code:

```sh
claude mcp add --transport http efon-call-rates-mcp-server https://efon.com/mcp
```

## Tools (4)

- `compare_call_rates`: eFon rate comparison: cheapest per-minute price (EUR and USD) for several countries, sorted from cheapest to most expensive, each with its country page URL. Use
- `get_call_rates`: eFon per-minute prices (EUR and USD) for calling a country, live: every rate line (mobile / landline / specific networks or regions), the cheapest price, any an
- `how_to_call`: eFon dialing guide for calling a destination country from an origin country: exit code, country code, example mobile and landline numbers written the way to dia
- `lookup_calling_code`: eFon calling-code lookup: 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

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.