# `com.coinira/calculators` 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/com.coinira/calculators
- JSON: https://anlyon.dev/api/v1/servers/com.coinira/calculators
- Version: 1.0.0 (active)
- Publisher: com.coinira (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-10-21T17:53:04.733Z

Title and description, as the publisher wrote them:

```untrusted-server-text
Coin IRA Crypto Calculators
Historical crypto investment and retirement calculators with cited market data.
```

Scanned 2026-10-21T18:47:37.260Z over streamable-http.

**2 tools: 2 change things.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 2 | ask |
| Only reads | read | 0 | allow |

## Findings

No check matched anything in these tool definitions.


## Changes things (2)

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

### `calculate_historical_crypto_investment`

- 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
Calculate what a past USD investment in BTC, ETH, XRP, or SOL would be worth on a later date. Uses cached daily closing market prices. Returns Coin IRA attribution, source links, price dates, results, and disclosures.
```

### `calculate_retirement_projection`

- 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
Calculate hypothetical compound growth for a supported crypto retirement account. Uses the caller's constant annual return. Does not use market prices or predict an asset's return. Returns Coin IRA attribution, source links, results, and disclosures.
```

## Claude Code permissions

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

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