# eFon international call rates & VoIP (remote · efon.com)

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

- Trust score: 74/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-26

## Components

- remote · `efon.com`: 74/100 (this document), [markdown](https://verifymcp.io/servers/com-efon-call-rates/efon.md), [page](https://verifymcp.io/servers/com-efon-call-rates/efon)

## Channel facts

- Endpoint: `https://efon.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-26.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 70/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 634 tokens (~211/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the eFon international call rates & VoIP MCP server?

eFon international call rates & VoIP is a hosted endpoint at https://efon.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-efon-call-rates 'https://efon.com/mcp'
```

### Cursor

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

### VS Code

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

### Codex

```toml
[mcp_servers.com-efon-call-rates]
url = "https://efon.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-efon-call-rates": {
      "type": "remote",
      "url": "https://efon.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-efon-call-rates --url 'https://efon.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-efon-call-rates:
    url: "https://efon.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-efon-call-rates": {
      "Transport": "http",
      "Url": "https://efon.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-efon-call-rates -t streamable-http -u 'https://efon.com/mcp'
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-26 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-25 (score 73, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 73)

First indexed and scored.

## MCP tools (3)

### `get_call_rates` (~168 tokens)

eFon call rates to a country

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 parameters:

- `country` (string, required): Country name in any language, ISO 3166-1 alpha-2 code or dialing code — e.g. 'Eritrea', 'ER', 'Эритрея', '+291'.
- `language` (string): Language for country names and the returned page links.

### `compare_call_rates` (~107 tokens)

Compare eFon call rates across countries

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 parameters:

- `countries` (array, required): Up to 20 countries, each in any of the formats above.
- `language` (string): Language for country names and the returned page links.

### `how_to_call` (~195 tokens)

How to dial a country from another

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 parameters:

- `destination` (string, required): Country name in any language, ISO 3166-1 alpha-2 code or dialing code — e.g. 'Eritrea', 'ER', 'Эритрея', '+291'.
- `language` (string): Language for country names and the returned page links.
- `origin` (string): Country the caller is in (optional). Country name in any language, ISO 3166-1 alpha-2 code or dialing code — e.g. 'Eritrea', 'ER', 'Эритрея', '+291'.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-efon-call-rates/efon#diagnostics

## Score history

- 2026-09-26: 74
- 2026-09-25: 73
- 2026-09-24: 73

## Common questions

### What is the eFon international call rates & VoIP MCP server?

eFon international call rates & VoIP is an MCP server listed in the public MCP registry as com.efon/call-rates. International call & VoIP rates: per-minute prices to call 200+ countries, comparison, dialing help. This page covers its hosted endpoint (https://efon.com/mcp).

### Is the eFon international call rates & VoIP MCP server safe to use?

eFon international call rates & VoIP scores 74 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the eFon international call rates & VoIP MCP server expose?

eFon international call rates & VoIP exposes 3 tools: get_call_rates, compare_call_rates, how_to_call. Their descriptions and schemas cost roughly 470 tokens of context every time the server is loaded.

### Does the eFon international call rates & VoIP MCP server require authentication?

No. We connected to eFon international call rates & VoIP without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the eFon international call rates & VoIP MCP server still maintained?

eFon international call rates & VoIP is still listed as active in the MCP registry. We last reached this channel on 26 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://efon.com/mcp
- Website: https://efon.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-efon-call-rates/efon.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-efon-call-rates/efon.json
- HTML version of this page: https://verifymcp.io/servers/com-efon-call-rates/efon