# `com.saveproptax/saveproptax` 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.saveproptax/saveproptax
- JSON: https://anlyon.dev/api/v1/servers/com.saveproptax/saveproptax
- Version: 1.0.0 (active)
- Publisher: com.saveproptax (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Repository: https://github.com/atifnayeem-oss/saveproptax-mcp
- Metadata from the official MCP Registry, synced 2026-10-21T18:02:13.400Z

Title and description, as the publisher wrote them:

```untrusted-server-text
SavePropTax
Free check of a California home for a Proposition 8 property tax reduction, plus owner filing.
```

Scanned 2026-10-21T18:36:27.914Z over streamable-http.

**3 tools: 2 change things and 1 only read.**

| 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 | 1 | allow |

## Exfil surface

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

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | `mcp__saveproptax__get_filing_status` |
| 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 (2)

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

### `check_property_tax_savings`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
Free check of whether a California home qualifies for a Proposition 8 decline-in-value property tax reduction. Returns a status (qualifies, fair_assessment, not_enough_data, not_residential, window_closed, county_not_served, already_filed, address_not_found, needs_more_info, busy), the current assessment, our opinion of value from recent comparable sales, and the estimated annual savings. When the property qualifies, the result includes a continueToken for start_filing. Checking is free and can only ever lower a tax bill, never raise it.
```

### `start_filing`

- The name "start_filing" says "start": a word for a change.

Description, as the server wrote it:

```untrusted-server-text
Start a county filing for a property that qualified in check_property_tax_savings. Prepares the county's own review form and emails a signing link to the OWNER'S email address. The link is never returned here: the owner personally reviews, signs, and pays a flat $29 before anything is filed. Requires the continueToken from a qualifying check (valid 24 hours).
```

## Only reads (1)

Looks things up and changes nothing. Claude Code: allow.

### `get_filing_status`

- The name "get_filing_status" says "get": a word for reading.
- Tag private-data: The description's first sentence says "document": it reads documents.

Description, as the server wrote it:

```untrusted-server-text
Coarse status of a filing by document id: awaiting_signature, awaiting_payment, filed, delivered, or unknown. Returns no personal information, addresses, or amounts.
```

## Claude Code permissions

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

```json
{
  "permissions": {
    "allow": [
      "mcp__saveproptax__get_filing_status"
    ],
    "ask": [
      "mcp__saveproptax__check_property_tax_savings",
      "mcp__saveproptax__start_filing"
    ],
    "deny": []
  }
}
```

Capability tags behind the rules (a read tagged outbound is asked about):

- `mcp__saveproptax__get_filing_status`: private-data

## Remote posture

What an anonymous client saw at the remote endpoint, last 2026-10-22T14:40:13.192Z, unchanged since 2026-10-22T14:40:13.192Z. No credentials were sent and no tool was called. Values are shown as the endpoint returned them. Method: https://anlyon.dev/methodology#remote-posture

| Fact | Observed |
| --- | --- |
| 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` |

- **warn** Tools that change things, listed to anyone ([unauth-remote-writes](https://anlyon.dev/methodology#unauth-remote-writes))

```untrusted-server-text
The endpoint served tools/list without credentials, and the list has 2 tools that change things (2 write). Whether a call also works without credentials was not tested: tools are never called.

https://saveproptax.com/mcp: tools/list returned 3 tools to an anonymous client, including check_property_tax_savings (write), start_filing (write)
```