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Opportunity Zones (opportunityzones.help)

help.opportunityzones.www/opportunityzones-helpwww.opportunityzones.helpstreamable-httpv1.2026.1102.0Scanned

Opportunity Zone address and tract lookup (2018 zones and the 2027 round), state data, program.

13 tools: 8 change things and 5 only read.

Tools: 0 delete, 0 irreversible, 8 write, 5 read.
  • Reads private data · 1
  • Reads text others write · 2
  • Can send data out · 0
  • 1 finding

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8 of these tools change something. Run those as governed actions.

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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.

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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.

13 tools

Changes things 8Claude Code: ask
  • calc_180_day_deadlineLast day to invest a gain in a QOF, with every start date the taxpayer may choose (direct, pass-through K-1, section 1231, RIC/REIT dividend, installment) and whether the window re…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
    Last day to invest a gain in a QOF, with every start date the taxpayer may choose (direct, pass-through K-1, section 1231, RIC/REIT dividend, installment) and whether the window reaches OZ 2.0 (Jan 1, 2027).

    Annotations the server declares

    • title: 180-day investment deadline
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • calc_2026_inclusionAmount of deferred gain included on Dec 31, 2026 for a pre-2027 QOF investment, with the 10%/15% basis step-up where the holding period was met, and an estimated tax at the user's …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
    Amount of deferred gain included on Dec 31, 2026 for a pre-2027 QOF investment, with the 10%/15% basis step-up where the holding period was met, and an estimated tax at the user's rate.

    Annotations the server declares

    • title: OZ 1.0 Dec 31, 2026 inclusion estimate
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • calc_90_percent_testAverages the two semiannual testing dates and, if the fund falls short, computes the Form 8996 Part IV penalty month by month (pass month-end figures in monthly for an exact figure…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
    Averages the two semiannual testing dates and, if the fund falls short, computes the Form 8996 Part IV penalty month by month (pass month-end figures in monthly for an exact figure; otherwise testing-date figures are applied to each half-year and the result is flagged as an approximation) at an underpayment rate the caller supplies.

    Annotations the server declares

    • title: QOF 90% asset test
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • calc_oz2_benefitModels an OZ 2.0 investment (5-year deferral, 10% or rural 30% step-up, 10-year exclusion capped at year 30) against paying tax now and investing the remainder.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
    Models an OZ 2.0 investment (5-year deferral, 10% or rural 30% step-up, 10-year exclusion capped at year 30) against paying tax now and investing the remainder.

    Annotations the server declares

    • title: OZ 2.0 benefit vs paying tax now
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • calc_substantial_improvementHow much must be added to a building's basis within 30 months (100%, or 50% in a zone made up entirely of rural areas).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
    How much must be added to a building's basis within 30 months (100%, or 50% in a zone made up entirely of rural areas).

    Annotations the server declares

    • title: Substantial improvement test
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • check_qozbChecks the 70% tangible property, 50% gross income, 40% intangibles and 5% nonqualified financial property tests and the excluded-business list.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
    Checks the 70% tangible property, 50% gross income, 40% intangibles and 5% nonqualified financial property tests and the excluded-business list.

    Annotations the server declares

    • title: Qualified Opportunity Zone Business tests
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • plan_working_capitalSpend-by dates for each cash infusion under the 31-month working capital safe harbor, and the 62-month outer limit available to start-up businesses.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
    Spend-by dates for each cash infusion under the 31-month working capital safe harbor, and the 62-month outer limit available to start-up businesses.

    Annotations the server declares

    • title: Working capital safe harbor timeline
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 5Show 5 read-only tools
  • get_key_datesThe program calendar: OZ 1.0 inclusion date, OZ 2.0 start, designation periods, filing dates.Reads private dataNo findings

    Why it is in this group

    • The name "get_key_dates" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "calendar": it reads calendars.
    Description, as the server wrote it
    The program calendar: OZ 1.0 inclusion date, OZ 2.0 start, designation periods, filing dates.

    Annotations the server declares

    • title: Opportunity Zone key dates
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_stateCounts of 2018 zones, rural zones, 2027-eligible tracts and their nomination/certification status for one state or territory, with the official source.No findings

    Why it is in this group

    • The name "get_state" says "get": a word for reading.
    Description, as the server wrote it
    Counts of 2018 zones, rural zones, 2027-eligible tracts and their nomination/certification status for one state or territory, with the official source.

    Annotations the server declares

    • title: Opportunity Zones in a state
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_tractStatus for an 11-digit census tract GEOID.No findings

    Why it is in this group

    • The name "get_tract" says "get": a word for reading.
    Description, as the server wrote it
    Status for an 11-digit census tract GEOID. A 2010 GEOID is checked against the 2018 designations and a 2020 GEOID against the 2027 round; many GEOIDs exist in both vintages. If you already geocoded a property, pass geoid_2010 and geoid_2020 instead of geoid.

    Annotations the server declares

    • title: One census tract's Opportunity Zone record
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • lookup_addressGeocodes a US street address (Census Bureau geocoder, falling back to OpenStreetMap; tract assignment by the FCC Census Block API) and returns its 2018 Opportunity Zone status (201…Reads text others writeNo findings

    Why it is in this group

    • The name "lookup_address" says "lookup": 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
    Geocodes a US street address (Census Bureau geocoder, falling back to OpenStreetMap; tract assignment by the FCC Census Block API) and returns its 2018 Opportunity Zone status (2010 tract), its status for the 2027 designation round (2020 tract: eligible, nominated or certified, with source), the rural flags, and Census ACS tract statistics.

    Annotations the server declares

    • title: Is this address in an Opportunity Zone?
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • lookup_coordinatesSame as lookup_address for a latitude/longitude point.Reads text others writeNo findings

    Why it is in this group

    • The name "lookup_coordinates" says "lookup": 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
    Same as lookup_address for a latitude/longitude point.

    Annotations the server declares

    • title: Opportunity Zone status for a point
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • 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 write2
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.

1 warn
  • Warnget_financing_link

    The server marks "get_financing_link" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_financing_link" says "get": a word for reading.

    What this check looks for

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.

All changes to this server

Install

Pinned to version 1.2026.1102.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http opportunityzones-help https://www.opportunityzones.help/api/oz/mcp
claude mcp add --transport http opportunityzones-help https://www.opportunityzones.help/api/oz/mcp

Run 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.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__opportunityzones-help__lookup_address",
      "mcp__opportunityzones-help__lookup_coordinates",
      "mcp__opportunityzones-help__get_tract",
      "mcp__opportunityzones-help__get_state",
      "mcp__opportunityzones-help__get_key_dates"
    ],
    "ask": [
      "mcp__opportunityzones-help__calc_180_day_deadline",
      "mcp__opportunityzones-help__calc_2026_inclusion",
      "mcp__opportunityzones-help__calc_oz2_benefit",
      "mcp__opportunityzones-help__calc_substantial_improvement",
      "mcp__opportunityzones-help__calc_90_percent_test",
      "mcp__opportunityzones-help__check_qozb",
      "mcp__opportunityzones-help__plan_working_capital",
      "mcp__opportunityzones-help__get_financing_link"
    ],
    "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 opportunityzones-help. Review it before you use it.

Capability tags behind 3 rules
  • mcp__opportunityzones-help__lookup_address untrusted-input
  • mcp__opportunityzones-help__lookup_coordinates untrusted-input
  • mcp__opportunityzones-help__get_key_dates private-data

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/help.opportunityzones.www/opportunityzones-help/verify?hash=35931bd88ec249e21ab4564c0c277a4969fae5b745e198d964a39ebe895be2b9" | jq -e '.changed == false'

Pinned hash 35931bd88ec2, from Nov 2, 2026, 17:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/help.opportunityzones.www/opportunityzones-help/changes.xml

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Badge

anlyon.dev badge for help.opportunityzones.www/opportunityzones-help
[![anlyon.dev](https://anlyon.dev/badge/help.opportunityzones.www/opportunityzones-help.svg)](https://anlyon.dev/servers/help.opportunityzones.www/opportunityzones-help)

Source: MCP Registry. Synced Nov 2, 2026, 17:17 UTC.