io.
by MassimoSun · remote · no sign-in to list tools · v0.1.3 · published by GitHub user MassimoSun
SMS verification for AI agents: buy a number, get the code, cancel with refund. Free sandbox.
9 tools: 1 can delete or cancel things, 1 change things and 7 only read.
Scanned Oct 22, 2026
- Deletes or cancels1Claude Code: deny: see these tools
- Can't be undone0Claude Code: ask
- Changes things1Claude Code: ask: see these tools
- Only reads7Claude Code: allow: see these tools
No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.
claude mcp add --transport http smsverbot https://kremledroid.duckdns.org/mcpTools
Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.
9 tools
Deletes or cancels 1Claude Code: deny
cancel_orderCancel an order and refund the balance exactly once.No findings
Why it is in this group
- The name "cancel_order" says "cancel": a word for removing or ending something.
Description, as the server wrote it Cancel an order and refund the balance exactly once.
Changes things 1Claude Code: ask
buy_numberBuy a phone number and debit the prepaid balance.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Buy a phone number and debit the prepaid balance.
Only reads 7Claude Code: allow
get_balanceReturn the current prepaid balance.No findings
Why it is in this group
- The name "get_balance" says "get": a word for reading.
Description, as the server wrote it Return the current prepaid balance.
get_priceGet the retail price for a service and country without buying.No findings
Why it is in this group
- The name "get_price" says "get": a word for reading.
Description, as the server wrote it Get the retail price for a service and country without buying.
list_countriesList countries available for SMS activation.No findings
Why it is in this group
- The name "list_countries" says "list": a word for reading.
Description, as the server wrote it List countries available for SMS activation.
list_servicesList services available for SMS activation in a country.No findings
Why it is in this group
- The name "list_services" says "list": a word for reading.
Description, as the server wrote it List services available for SMS activation in a country.
order_historyReturn recent orders for the API key.No findings
Why it is in this group
- The description's first verb is "return": a word for reading.
Description, as the server wrote it Return recent orders for the API key.
wait_for_codeWait for an SMS code for an existing order.No findings
Why it is in this group
- The name "wait_for_code" says "wait": a word for reading.
Description, as the server wrote it Wait for an SMS code for an existing order.
whoamiVerify an API key and return its id and balance in rubles.No findings
Why it is in this group
- The name "whoami" says "whoami": a word for reading.
Description, as the server wrote it Verify an API key and return its id and balance in rubles.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Remote posture
What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.
Looked at Oct 22, 2026, 14:53 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.
- Reachable
- yes
- HTTP status of an anonymous initialize
- 200
- tools/list served without credentials
- yes
- Tools that change things, listed without credentials
- 2
- Protocol version
- 2025-06-18
- WWW-Authenticate on 401
- not observed
- resource_metadata in WWW-Authenticate
- none
- RFC 9728 protected resource metadata
- none
- Authorization servers
- none
- Legacy HTTP+SSE transport
- no
- Dynamic client registration
- not observed
- Client ID metadata documents
- not observed
- HighThe whole server
The endpoint served tools/list without credentials, and the list has 2 tools that change things (1 destructive, 1 write). Whether a call also works without credentials was not tested: tools are never called.
What this check looks forMatched text
https://kremledroid.duckdns.org/mcp: tools/list returned 9 tools to an anonymous client, including cancel_order (destructive), buy_number (write)
Install
Pinned to version 0.1.3. Values in angle brackets are yours to fill in.
claude mcp add --transport http smsverbot https://kremledroid.duckdns.org/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__smsverbot__list_services",
"mcp__smsverbot__list_countries",
"mcp__smsverbot__get_price",
"mcp__smsverbot__wait_for_code",
"mcp__smsverbot__get_balance",
"mcp__smsverbot__order_history",
"mcp__smsverbot__whoami"
],
"ask": [
"mcp__smsverbot__buy_number"
],
"deny": [
"mcp__smsverbot__cancel_order"
]
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as smsverbot. Review it before you use it.