eFon international call rates & VoIP
REMOTE · EFON.COM · SCANNED SEP 26
International call & VoIP rates: per-minute prices to call 200+ countries, comparison, dialing help.
Available components
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. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability70
- AI-judged instruction clarity (excellent).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management7
- Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
remote · efon.com
claude mcp add --transport http com-efon-call-rates 'https://efon.com/mcp'
{
"mcpServers": {
"com-efon-call-rates": {
"url": "https://efon.com/mcp"
}
}
} {
"servers": {
"com-efon-call-rates": {
"type": "http",
"url": "https://efon.com/mcp"
}
}
} [mcp_servers.com-efon-call-rates] url = "https://efon.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-efon-call-rates": {
"type": "remote",
"url": "https://efon.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-efon-call-rates --url 'https://efon.com/mcp' --transport streamable-http
mcp_servers:
com-efon-call-rates:
url: "https://efon.com/mcp" {
"McpServers": {
"com-efon-call-rates": {
"Transport": "http",
"Url": "https://efon.com/mcp"
}
}
} assistant mcp add com-efon-call-rates -t streamable-http -u 'https://efon.com/mcp'
{
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 26 Sept 26 +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.
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 24 Sept 26 73
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 26 Sept 2026 · Probed https://efon.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_256_GCM_SHA384 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=efon.com | CN=YE2,O=Let's Encrypt,C=US | 15 Aug 2026 | 13 Nov 2026 | ECDSA 256 | ECDSA-SHA384 | 6905069a81468a9c1fb5607b6bcbd785c5e |
| SANs: efon.com, mta-sts.efon.com, www.efon.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of efon.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| efon.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; preload |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | same-origin |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://efon.com/mcp | Verified | 200 | |
| http (plaintext) | http://efon.com/mcp | HTTPS enforced | 301 | https://efon.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
compare_call_rates Compare eFon call rates across countries ~107
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?").
| Name | Type | Req | Description |
|---|---|---|---|
| countries | array | yes | Up to 20 countries, each in any of the formats above. |
| language | string | – | Language for country names and the returned page links. |
No output schema declared.
No examples provided.
get_call_rates eFon call rates to a country ~168
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".
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | yes | 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. |
No output schema declared.
No examples provided.
how_to_call How to dial a country from another ~195
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.
| Name | Type | Req | Description |
|---|---|---|---|
| destination | string | yes | 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'. |
No output schema declared.
No examples provided.
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.