# `dev.pages.ifta-calculator/ifta` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/dev.pages.ifta-calculator/ifta
- JSON: https://anlyon.dev/api/v1/servers/dev.pages.ifta-calculator/ifta
- Version: 1.0.0 (active)
- Publisher: dev.pages.ifta-calculator (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-10-29T11:17:37.964Z

Title and description, as the publisher wrote them:

```untrusted-server-text
Free IFTA Calculator
Read-only IFTA fuel-tax answers and quarterly estimates with official rates. Not tax advice.
```

Scanned 2026-10-29T11:18:04.518Z over streamable-http.

**1 tool: 1 change things.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 1 | ask |
| Only reads | read | 0 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | none |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | none |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | none |

## Findings

No check matched anything in these tool definitions.


## Changes things (1)

Creates or changes something that can be changed back. Claude Code: ask.

### `answer_ifta_question`

- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

Description, as the server wrote it:

```untrusted-server-text
Answers US/Canadian IFTA fuel-tax questions for trucking owner-operators: the Q3 2026 (Jul-Sep) due date, how the quarterly reconciliation works, and official IFTA 3Q2026 tax and surcharge rates per jurisdiction and fuel. If miles and gallons per jurisdiction are given, it estimates the quarter's tax owed or credit with the same maths as the free IFTA calculator at ifta-calculator.pages.dev. Only Q3 2026 rates are loaded. Estimates only, not tax advice and not a filed return. Read-only: it stores nothing and files nothing.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `ifta`:

```json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__ifta__answer_ifta_question"
    ],
    "deny": []
  }
}
```