Grove Hopper Property Tax Check
com.grovehopper.www/property-tax-appealwww.grovehopper.comstreamable-httpv1.0.0Scanned
Check any US address for property tax over-assessment: value, appeal deadline, exemptions. No login.
5 tools: 3 change things and 2 only read.
- Reads private data · 1
- Reads text others write · 4
- Can send data out · 0
- No findings
Anlyon alternative
3 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
5 tools
Changes things 3Claude Code: ask
answer_property_tax_questionUse this for any general property tax question that is not about one specific address: "how do I appeal my property tax assessment", "does a deck raise property taxes", "does finis…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.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Use this for any general property tax question that is not about one specific address: "how do I appeal my property tax assessment", "does a deck raise property taxes", "does finishing a basement or a kitchen remodel increase property taxes", how assessments and exemptions work, what evidence wins an appeal. Applies to any US state. Returns sourced answers from Grove Hopper county and state guides and research posts, with links, and points the person to the free check for their own address. Optionally pass a state and county to prefer local guide answers. Do not use when the person gives an address and wants it checked (use check_property_tax_assessment). Read-only.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
calculate_property_taxUse this when someone wants to estimate a property tax bill ("how much is my property tax"), see what a home improvement would add ("does a deck raise property taxes, and by how mu…Reads text others writeNo findings
Why it is in this group
- 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Use this when someone wants to estimate a property tax bill ("how much is my property tax"), see what a home improvement would add ("does a deck raise property taxes, and by how much"), or see what a successful appeal would save per year. Works for any US address, county or state. Give the assessed value from the tax bill or notice, or a street address and the assessed value is looked up. For the tax rate give any one of: the current annual tax bill, a rate in percent, a millage rate, or just the state and county (or an address) and the typical local effective rate is used and labeled as an estimate. Scenarios: estimate_bill, improvement (add improvementCost or addedAssessedValue), appeal (add newAssessedValue or reductionPercent). The formula and rate source are shown. Read-only.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: true
check_property_tax_assessmentUse this when someone asks "is my property tax too high", "is my home over-assessed", "what is my home assessed at", or wants to know if they can appeal the property tax assessment…Reads text others writeNo findings
Why it is in this group
- 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Use this when someone asks "is my property tax too high", "is my home over-assessed", "what is my home assessed at", or wants to know if they can appeal the property tax assessment on a specific US address. Works for any US address. Takes a full street address, confirms the property and county, and returns the assessed value with its tax year and source link (read from the official county record where we connect to it directly, otherwise found by a live search of county and public record pages, and it says which), an estimated annual tax bill with the rate used, what a 10% lower value would save, the appeal deadline with days left, who hears the appeal and how to file, and a result card with a button to the free Grove Hopper report (comparable sales and assessments, strongest appeal angle, unclaimed exemptions). Can take up to about 25 seconds for addresses that need the live search. Do not use for general questions with no address (use answer_property_tax_question) or for non-US properties. Read-only; nothing is filed or submitted.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: true
Only reads 2Show 2 read-only tools
find_property_tax_exemptionsUse this when someone asks about "property tax exemptions for seniors", veteran or disabled-veteran property tax exemptions, disability exemptions, a homestead exemption, or a seni…Reads text others writeNo findings
Why it is in this group
- The name "find_property_tax_exemptions" says "find": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Use this when someone asks about "property tax exemptions for seniors", veteran or disabled-veteran property tax exemptions, disability exemptions, a homestead exemption, or a senior property tax freeze. Works for any US state and county. Takes a state, optionally a county, and the situation (senior, veteran, disabled, homestead). Returns each program with what it does, who qualifies, how and by when to apply, and source links, from Grove Hopper county research, our 50-state roundups and a live search of official pages where needed. Do not use for appealing an assessment (use get_property_tax_appeal_deadline). Can take up to about 25 seconds when the live search is needed. Read-only.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: true
get_property_tax_appeal_deadlineUse this when someone asks for the "property tax appeal deadline", "when is the last day to appeal my property tax assessment", or where and how to file a property tax appeal.Reads private dataReads text others writeNo findings
Why it is in this group
- The name "get_property_tax_appeal_deadline" says "get": a word for reading.
What it can reach
- private-dataThe description's first sentence says "file": it reads files.
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Use this when someone asks for the "property tax appeal deadline", "when is the last day to appeal my property tax assessment", or where and how to file a property tax appeal. Works for any US address or county. Give a street address, or a county and state. Returns the exact deadline date with days left, the board or office that hears the appeal, the filing method, form and steps, and source links. Where a county sets deadlines per township or town (for example in Illinois, New York, New Jersey, Massachusetts and Michigan), a street address returns the date for that parcel's township or town. Where the deadline runs from the date on the assessment notice (for example in Texas, Florida, Georgia and Washington), it returns the rule and computes the exact day when given the notice date. Can take up to about 25 seconds for counties that need the live search. Do not use for exemption applications (use find_property_tax_exemptions). Read-only.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: true
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 outbound.
- Reads private data1
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write4
- 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.
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http property-tax-appeal https://www.grovehopper.com/mcpclaude mcp add --transport http property-tax-appeal https://www.grovehopper.com/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__property-tax-appeal__get_property_tax_appeal_deadline",
"mcp__property-tax-appeal__find_property_tax_exemptions"
],
"ask": [
"mcp__property-tax-appeal__check_property_tax_assessment",
"mcp__property-tax-appeal__calculate_property_tax",
"mcp__property-tax-appeal__answer_property_tax_question"
],
"deny": []
}
}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 property-tax-appeal. Review it before you use it.
Capability tags behind 4 rules
- mcp__property-tax-appeal__check_property_tax_assessment untrusted-input
- mcp__property-tax-appeal__get_property_tax_appeal_deadline private-data, untrusted-input
- mcp__property-tax-appeal__find_property_tax_exemptions untrusted-input
- mcp__property-tax-appeal__calculate_property_tax untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/com.grovehopper.www/property-tax-appeal/verify?hash=f6af255c1bacc0abf3a0ab7b6a733f0ecda421e34fe09986c034f7379f49b13a" | jq -e '.changed == false'Pinned hash f6af255c1bac, from Nov 3, 2026, 22:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/com.grovehopper.www/property-tax-appeal/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/com.grovehopper.www/property-tax-appeal)Source: MCP Registry. Synced Nov 3, 2026, 22:17 UTC.