PortlandMaps (Unofficial)

by GPTNowLLC · remote · local (npm) · no sign-in to list tools · v0.2.5 · published by GitHub user GPTNowLLC

Unofficial MCP server for the public PortlandMaps property/permit/zoning API. Not city-affiliated.

Final · 1Changes · 2

Compare Registry entry

11 tools: 1 do something that can't be undone, 2 change things and 8 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things2Claude Code: ask: see these tools
Only reads8Claude Code: allow: see these tools

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http portlandmaps https://portlandmaps-mcp.vercel.app/mcp/v2

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnconvert_geometry
The server marks "convert_geometry" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "convert_geometry" says "convert": a word for a change.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

11 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

convert_geometry1:1 wrapper for /api/geometry/.1 finding
Why it is in this group
- The name "convert_geometry" says "convert": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "convert_geometry" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "convert_geometry" says "convert": a word for a change.
  What this check looks for
Description, as the server wrote it
1:1 wrapper for /api/geometry/. Convert geometry between ESRI, WKT, GeoJSON, GPolyline, and EncodedGPolyline.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Changes things 2Creates or changes something that can be changed back.Claude Code: ask

render_parcel_shapeRender a property's lot as an interactive UI component (inline SVG): a City of Portland aerial photo underlay (showing the true roofline) with the parcel outline, the building foot…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
Render a property's lot as an interactive UI component (inline SVG): a City of Portland aerial photo underlay (showing the true roofline) with the parcel outline, the building footprint(s) on the lot, approximate setback dimensions, a north arrow, and faint neighbouring parcels overlaid on top. Provide a detailType+detailId to fetch geometry, or pass rings directly. Aerial, footprints, and neighbours come from Portland's public ArcGIS layers; set basemap="none" to drop the photo and includeContext=false for just the bare outline. Renders in MCP Apps hosts (Claude) and legacy mcp-ui hosts.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
suggest_portlandmaps_address1:1 wrapper for /api/suggest/.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
1:1 wrapper for /api/suggest/. Search PortlandMaps autocomplete for addresses, intersections, landmarks, or IDs. ANSWER GUIDANCE: when this data answers a resident's zoning, permit, property, or city-code question, write for a Portland resident or small-business owner with no code, zoning, or permitting background. Lead with a 3–5 sentence plain-English summary (never open with a data table). Then cite EVERY rule, fee, number, timeline, or contact INLINE in the same sentence with both its exact code section AND a full https:// portland.gov URL (e.g. PCC 33.110.255.C, https://www.portland.gov/code/33/110/255) — never cite vaguely ("Title 33", "the BDS website") and never drop the URL. Define every acronym, add a numbered "what to do next" list, and if a number can't be cited to a specific section + URL, say so rather than stating it bare.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Only reads 8Looks things up and changes nothing.Claude Code: allow

get_assessor_data1:1 wrapper for /api/assessor/.No findings
Why it is in this group
- The name "get_assessor_data" says "get": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/assessor/. Search assessor records by address, property IDs, geometry, or assessor filters.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_permit_data1:1 wrapper for /api/permit/.No findings
Why it is in this group
- The name "get_permit_data" says "get": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/permit/. Search building/trade/enforcement permit records. ANSWER GUIDANCE: when this data answers a resident's zoning, permit, property, or city-code question, write for a Portland resident or small-business owner with no code, zoning, or permitting background. Lead with a 3–5 sentence plain-English summary (never open with a data table). Then cite EVERY rule, fee, number, timeline, or contact INLINE in the same sentence with both its exact code section AND a full https:// portland.gov URL (e.g. PCC 33.110.255.C, https://www.portland.gov/code/33/110/255) — never cite vaguely ("Title 33", "the BDS website") and never drop the URL. Define every acronym, add a numbered "what to do next" list, and if a number can't be cited to a specific section + URL, say so rather than stating it bare.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_portlandmaps_detail1:1 wrapper for /api/detail/.No findings
Why it is in this group
- The name "get_portlandmaps_detail" says "get": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/detail/. Fetch a detail record by detail_type, detail_id, and sections. ANSWER GUIDANCE: when this data answers a resident's zoning, permit, property, or city-code question, write for a Portland resident or small-business owner with no code, zoning, or permitting background. Lead with a 3–5 sentence plain-English summary (never open with a data table). Then cite EVERY rule, fee, number, timeline, or contact INLINE in the same sentence with both its exact code section AND a full https:// portland.gov URL (e.g. PCC 33.110.255.C, https://www.portland.gov/code/33/110/255) — never cite vaguely ("Title 33", "the BDS website") and never drop the URL. Define every acronym, add a numbered "what to do next" list, and if a number can't be cited to a specific section + URL, say so rather than stating it bare.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
list_detail_typesReturn the detail_type values accepted by get_portlandmaps_detail and the identifier each expects.No findings
Why it is in this group
- The name "list_detail_types" says "list": a word for reading.
Description, as the server wrote it
Return the detail_type values accepted by get_portlandmaps_detail and the identifier each expects.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
lookup_agol1:1 wrapper for /api/agol/.No findings
Why it is in this group
- The name "lookup_agol" says "lookup": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/agol/. Retrieve City of Portland ArcGIS Online metadata, webmaps, locators, and portal info.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
query_intersects1:1 wrapper for /api/intersects/.No findings
Why it is in this group
- The name "query_intersects" says "query": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/intersects/. Spatial intersection against named city layers such as row, taxlot, describe, street, and waterbody.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
search_landuse_cases1:1 wrapper for /api/landuse/.No findings
Why it is in this group
- The name "search_landuse_cases" says "search": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/landuse/. Search land use review cases, including Historic Resource Review and Tree Review. ANSWER GUIDANCE: when this data answers a resident's zoning, permit, property, or city-code question, write for a Portland resident or small-business owner with no code, zoning, or permitting background. Lead with a 3–5 sentence plain-English summary (never open with a data table). Then cite EVERY rule, fee, number, timeline, or contact INLINE in the same sentence with both its exact code section AND a full https:// portland.gov URL (e.g. PCC 33.110.255.C, https://www.portland.gov/code/33/110/255) — never cite vaguely ("Title 33", "the BDS website") and never drop the URL. Define every acronym, add a numbered "what to do next" list, and if a number can't be cited to a specific section + URL, say so rather than stating it bare.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
search_sewer_records1:1 wrapper for /api/sewer/.No findings
Why it is in this group
- The name "search_sewer_records" says "search": a word for reading.
Description, as the server wrote it
1:1 wrapper for /api/sewer/. Search sewer assets, as-builts, and easements.
Annotations the server declares
- 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.

Install

Pinned to version 0.2.5. Values in angle brackets are yours to fill in.

claude mcp add --transport http portlandmaps https://portlandmaps-mcp.vercel.app/mcp/v2

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__portlandmaps__get_portlandmaps_detail",
      "mcp__portlandmaps__get_assessor_data",
      "mcp__portlandmaps__get_permit_data",
      "mcp__portlandmaps__search_landuse_cases",
      "mcp__portlandmaps__search_sewer_records",
      "mcp__portlandmaps__query_intersects",
      "mcp__portlandmaps__lookup_agol",
      "mcp__portlandmaps__list_detail_types"
    ],
    "ask": [
      "mcp__portlandmaps__suggest_portlandmaps_address",
      "mcp__portlandmaps__convert_geometry",
      "mcp__portlandmaps__render_parcel_shape"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as portlandmaps. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.GPTNowLLC/portlandmaps-mcp/changes.xml

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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.

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Source: MCP Registry · repository. Synced Oct 21, 2026, 18:16 UTC.

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