Skip to content
verify mcp Beta VerifyMCP is currently in beta. If you notice any issues, get in touch and we’ll put it right.

Bucky

REMOTE · BUCKYBUILD.COM · SCANNED SEP 21

Zoning, parcel, and development feasibility for a street address in Canada and the US.

Available components

+4 this week 84 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security80
Transport & Reachability100
Schema Quality & AI Usability73
  • 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
  • AI-judged instruction clarity (good).Pass
  • Context-footprint check failed: tool/resource definitions use about 3845 tokens (~295/item across 13 items; 11 tools + 2 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management80
  • Stability observed for 24 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage93
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 79% of tool parameters carry a description.Partial
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a current MCP spec version (2026-07-28).Pass
  • Supports UI / widget rendering.Pass
Install

How do I install the Bucky MCP server?

Bucky is a hosted endpoint at https://buckybuild.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · buckybuild.com

# add to Claude Code
claude mcp add --transport http com-buckybuild-bucky 'https://buckybuild.com/api/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "com-buckybuild-bucky": {
      "url": "https://buckybuild.com/api/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "com-buckybuild-bucky": {
      "type": "http",
      "url": "https://buckybuild.com/api/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.com-buckybuild-bucky]
url = "https://buckybuild.com/api/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-buckybuild-bucky": {
      "type": "remote",
      "url": "https://buckybuild.com/api/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add com-buckybuild-bucky --url 'https://buckybuild.com/api/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  com-buckybuild-bucky:
    url: "https://buckybuild.com/api/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "com-buckybuild-bucky": {
      "Transport": "http",
      "Url": "https://buckybuild.com/api/mcp"
    }
  }
}
# add to Vellum
assistant mcp add com-buckybuild-bucky -t streamable-http -u 'https://buckybuild.com/api/mcp'
// mcp.json
{
  "mcpServers": {
    "com-buckybuild-bucky": {
      "type": "http",
      "url": "https://buckybuild.com/api/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 21 Sept 26 +1
    • Resource “Bucky” now points somewhere else: ui://bucky/app.html → ui://bucky/app.html?v=48a465c08e93 security
    • Tool “getProjectContext” rewrote its description, which is the text the model reads security
    • Tool “produceProjectReport” rewrote its description, which is the text the model reads security
    • Tool “runFeasibilityAnalysis” rewrote its description, which is the text the model reads security
    • Tool “saveToProject” rewrote its description, which is the text the model reads security
    • Tool “setProjectMapListing” rewrote its description, which is the text the model reads security
    • Tool “updateProject” rewrote its description, which is the text the model reads security
    • Schema quality: 257 → 295 functional
    • Tool coverage: 68% → 79% functional
    • Schema quality: excellent → good functional
    • “getProjectContext” added an optional parameter “project” cosmetic
    • “produceProjectReport” added an optional parameter “project” cosmetic
    • “runFeasibilityAnalysis” added an optional parameter “project” cosmetic
    • “saveToProject” added an optional parameter “project” cosmetic
    • “setProjectMapListing” added an optional parameter “project” cosmetic
    • “updateProject” added an optional parameter “project” cosmetic
    • “explainFeasibilityStatus” reworded the description of “status” cosmetic
    • “getProjectContext” reworded the description of “projectId” cosmetic
    • “produceProjectReport” reworded the description of “projectId” cosmetic
    • “runFeasibilityAnalysis” reworded the description of “projectId” cosmetic
    • “saveToProject” reworded the description of “projectId” cosmetic
    • “setProjectMapListing” reworded the description of “projectId” cosmetic
    • “updateProject” reworded the description of “projectId” cosmetic
    • “produceProjectReport” made “projectId” optional cosmetic
    • “runFeasibilityAnalysis” made “projectId” optional cosmetic
    • “setProjectMapListing” made “projectId” optional cosmetic
    • “updateProject” made “projectId” optional cosmetic
  • 19 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

  • 17 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

  • 16 Sept 26 0
    • Tool “explainFeasibilityStatus” rewrote its description, which is the text the model reads security
    • Tool “getFeasibilitySnapshot” rewrote its description, which is the text the model reads security
    • Tool “getProjectContext” rewrote its description, which is the text the model reads security
    • Tool “saveToProject” rewrote its description, which is the text the model reads security
    • Tool “updateProject” rewrote its description, which is the text the model reads security
    • Schema quality: 212 → 257 functional
    • Tool coverage: 59% → 68% functional
    • Schema quality: good → excellent functional
    • New tool “setProjectMapListing” functional
    • “saveToProject” added an optional parameter “externalRef” cosmetic
    • “updateProject” added an optional parameter “externalRef” cosmetic
    • “explainFeasibilityStatus” reworded the description of “status” cosmetic
    • “saveToProject” reworded the description of “address” cosmetic
    • “saveToProject” reworded the description of “lat” cosmetic
    • “saveToProject” reworded the description of “lng” cosmetic
    • “submitBuckyFeedback” reworded the description of “submissionId” cosmetic
    • “submitBuckyFeedback” made “submissionId” optional cosmetic
  • 15 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

  • 13 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

  • 11 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

  • 8 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 21 Sept 2026 · Probed https://buckybuild.com/api/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=buckybuild.com CN=YR2,O=Let's Encrypt,C=US 30 Jul 2026 28 Oct 2026 RSA 2048 SHA256-RSA 65a8a161d8f489170d331f90a4100e30138
SANs: buckybuild.com
CN=YR2,O=Let's Encrypt,C=US (CA) CN=Root YR,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 RSA 2048 SHA256-RSA 4ebd24947e24d394802d84a52fd5b319
CN=Root YR,O=ISRG,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 RSA 4096 SHA256-RSA f24b6d17f9d9ad7cb1c9fea78782699f

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of buckybuild.com. Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
buckybuild.com. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200
Header Value
strict-transport-security max-age=31536000; includeSubDomains; preload
content-security-policy default-src 'none'; frame-ancestors 'none'; report-to csp-endpoint; report-uri /api/security/csp-report
x-content-type-options nosniff
x-frame-options DENY
referrer-policy strict-origin-when-cross-origin
permissions-policy geolocation=(self), microphone=(self), camera=(), payment=*, usb=()

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://buckybuild.com/api/mcp Verified 200
http (plaintext) http://buckybuild.com/api/mcp HTTPS enforced 308 https://buckybuild.com/api/mcp
MCP tools · 11 exposed · ~3,783 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
explainFeasibilityStatus ~341

Explain one Bucky coverage or per-fact provenance status and the safe next action. This is a pure static lookup: it does not inspect an address, retrieve property data, or call a database, geocoder, AI model, or third-party API. Accepts exactly one of: live, live_unavailable, planned_not_live, geo_division_uncatalogued, unseeded_place, geocode_failed, cited, cited_conditional, conditional_unresolved, no_limit_in_bylaw, not_extracted, site_specific_schedule, unverified_default.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
statusstringyesA Bucky coverage resolution status or per-fact provenance status returned by a feasibility result. Must be copied verbatim from a feasibility result — one of: live, live_unavailable, planned_not_live…

No output schema declared.

No examples provided.

getBuckyMcpGuide ~179

Return a static guide to the Bucky MCP surface: what works without sign-in, how to start OAuth by calling a gated tool, how to connect Cursor or the CLI with a real account, and feasibility safety rules. Makes no database, geocoding, AI, or third-party API call.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…

No output schema declared.

No examples provided.

getFeasibilitySnapshot ~391

Look up what can be built at a specific street address in Canada or the US. Returns the lot (area, width, depth), its zone and permitted uses, and the building envelope (height, storeys, site coverage, FSR, and front/rear/side/flanking setbacks) in one call. Use when someone asks what they can build, how tall, how close to the property line, how big their lot is, or what their property is zoned for. Do not use for questions that are not about a specific address — it resolves one address at a time and cannot search or compare. Every envelope value carries a `status`. A null value with status `no_limit_in_bylaw` means the bylaw sets no limit; a null value with status `not_extracted` means the value is unknown to Bucky; a null value with status `site_specific_schedule` means the zone is governed by a per-site schedule, not a zone table. Never report `not_extracted` or `site_specific_schedule` as "no limit" or as zero.

NameTypeReqDescription
addressstringyesStreet address to analyse, e.g. "4170 Sophia St, Vancouver BC".
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
sourcestringyesWhich question the caller is answering. Used for attribution and to pick the link back; the payload is the same either way.

No output schema declared.

No examples provided.

getProjectContext ~268

Load one project with analysis envelope, compact agentStatus, document summaries, evidence summaries, the project memory digest, and external_ref when the project was imported from another system. You do not need a UUID: pass `project` with the name the user said, or call with neither and the result lists their projects to choose from. Use before composing reports or after scheduling analysis.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
documentsLimitintegeryes
evidenceLimitintegeryes
projectstringProject name to match, when you do not have the UUID. Case-insensitive; an exact name wins over a partial one. Matching more than one lists the candidates instead of guessing.
projectIdstringProject UUID. Omit if you pass `project`.

No output schema declared.

No examples provided.

produceProjectReport ~355

Pass `projectId`, or `project` with the name the user said; with neither, the result lists their projects and no meter is spent. Compose a grounded report plan, optionally preview without spending export meter (`preview=true`), or confirm export (`confirm=true`) to save the plan and return a short-lived signed download URL plus a receipt — never PDF bytes in the tool result. Confirm spends `records.exports` and is irreversible.

NameTypeReqDescription
audiencestringyes
confirmbooleanyesWhen true, compose (if needed), save, export PDF, and return a download URL. Required when preview is false. Spends records.exports and cannot be undone.
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
detailstringyes
planNamestring
previewbooleanyesWhen true, compose only — no export meter spend and no download URL.
projectstringProject name to match, when you do not have the UUID. Case-insensitive; an exact name wins over a partial one. Matching more than one lists the candidates instead of guessing.
projectIdstringProject UUID. Omit if you pass `project`.
requeststring

No output schema declared.

No examples provided.

runFeasibilityAnalysis ~299

Enqueue a fresh deterministic analysis run for a saved project. Pass `projectId`, or `project` with the name the user said; with neither, the result lists their projects and nothing is queued. Returns immediately with `agentStatus` (`queued`, `running`, `current`, `failed`, or `none`) and a receipt id; does not block on completion. Irreversible: a queued run cannot be un-queued from MCP. Re-check with `getProjectContext`, but no more than once every 15 seconds — it is a multi-query bundle, not a status endpoint.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
projectstringProject name to match, when you do not have the UUID. Case-insensitive; an exact name wins over a partial one. Matching more than one lists the candidates instead of guessing.
projectIdstringProject UUID. Omit if you pass `project`.

No output schema declared.

No examples provided.

saveToProject ~747

Create a new project from a site (`create`), attach lots (`attach_parcels`, using lot.parcelExternalId from getFeasibilitySnapshot), or attach a knowledge reference (`attach_reference`). On `create`, pass `address`, or `lat` and `lng` from getFeasibilitySnapshot when you already have them: coordinates resolve the project to a city, and an address alone is geocoded server-side. Check `geography` on the result — `resolved: false` means the project has no city context and feasibility analysis will have nothing to resolve against, and `coordinateSource: "geocoded"` means the server picked the point, so confirm it is the right site. preview=true returns the field-level diff and writes nothing. A write returns a receipt. Not reversible on this surface: MCP cannot archive a project, detach a parcel, or detach a reference. attach_parcels and attach_reference take `projectId`, or `project` with the name the user said; with neither, the result lists their projects and nothing is attached. Create accepts idempotencyKey and externalRef (`<system>:<id>`, e.g. `notion:<page-id>`) so an imported project can be looked up later.

NameTypeReqDescription
actionstringyescreate: new project from a site. attach_parcels: attach lots to an existing project (use lot.parcelExternalId from getFeasibilitySnapshot). attach_reference: link a knowledge section to an existing p…
addressstringStreet address of the site. On `create` this is geocoded server-side when lat/lng are not supplied, and is what gets recorded as the project address.
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
externalRefstringProvenance of an imported project. Canonical form is `<system>:<id>` (e.g. `notion:<page-id>`). Unique per creator when set. Returned on getProjectContext. Distinct from idempotencyKey.
idempotencyKeystring
latnumberLatitude from getFeasibilitySnapshot. Supplied coordinates are never re-geocoded.
lngnumberLongitude from getFeasibilitySnapshot.
namestring
parcelExternalIdsarraySource parcel ids to attach. Copy lot.parcelExternalId from getFeasibilitySnapshot, or from bucky parcels search.
previewbooleanyesWhen true, return the field-level diff and write nothing.
projectstringProject name to match instead of a UUID, for attach_parcels and attach_reference. Matching more than one lists the candidates instead of guessing. Ignored by create.
projectIdstringExisting project UUID. Required by attach_parcels and attach_reference unless you pass `project`; ignored by create.
radiusMintegerSearch half-width in metres when resolving parcel ids. Default 150.
rolestringbuild is the lot being developed; context is surrounding land. Default build.
sectionUuidstring

No output schema declared.

No examples provided.

setProjectMapListing ~429

Put a project on the public Bucky map, or take it off. Pass `projectId`, or `project` with the name the user said; with neither, the result lists their projects and nothing is published. Listing publishes the build-lot centroid, the project name, its zone category, typology and lifecycle status to anyone — signed in or not. Nothing else about the project is published. The project must have a build lot with a centroid; a project that has only an address and no attached build parcel cannot be pinned. Ask the human before listing a site that is not already public knowledge. A client, a friend, or a private residence is theirs to publish, not yours. preview=true returns the current state, the exact pin that would be published, and any privacy warning, and writes nothing. Unlisting removes the pin but does not un-share anything already collected while it was public.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
listedbooleanyestrue lists the project on the public map; false removes it. Listing publishes the build-lot centroid and the project name to anyone, signed in or not.
previewbooleanyesWhen true, return the current listing state, the pin that would be published, and any privacy warning, and write nothing.
projectstringProject name to match, when you do not have the UUID. Case-insensitive; an exact name wins over a partial one. Matching more than one lists the candidates instead of guessing.
projectIdstringProject UUID. Omit if you pass `project`.

No output schema declared.

No examples provided.

submitBuckyFeedback ~243

Open a human-reviewed feedback form and submit it to the Bucky product team. Call only when the user explicitly asks to send feedback, report a problem, suggest an improvement, or praise something. The server asks the MCP client to show the form; nothing is saved unless the human accepts it. Do not use for silent agent self-reporting.

NameTypeReqDescription
affectedToolNamestringTool the user is commenting on, when already known
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
submissionIdstringOptional. A UUID for this submission; generated server-side when omitted. Pass the same UUID when retrying this exact feedback so it is not recorded twice.

No output schema declared.

No examples provided.

uiGetAnalysisStatus ~159

Return only the analysis `agentStatus` for a project. Cheap enough to poll. Used by the Bucky app view; the model should call getProjectContext instead.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
projectIdstringyes

No output schema declared.

No examples provided.

updateProject ~372

Patch project metadata (name, lifecycle status, externalRef). Pass `projectId`, or `project` with the name the user said; with neither, the result lists their projects and nothing is written. preview=true returns the field-level diff and writes nothing. A write returns a receipt; undoOperationId restores the captured prior fields. Does not archive or delete.

NameTypeReqDescription
contextstringyesExplain why you are calling this tool and how it fits into the user's overall goal. This parameter is used for analytics and user intent tracking. YOU MUST provide 15-25 words (count carefully). NEVE…
externalRefProvenance of an imported project. Canonical form is `<system>:<id>` (e.g. `notion:<page-id>`). Unique per creator when set. Pass null to clear.
lifecycleStatusstring
namestring
previewbooleanyesWhen true, return the field-level diff and write nothing. Combined with undoOperationId, returns the stored receipt.
projectstringProject name to match, when you do not have the UUID. Case-insensitive; an exact name wins over a partial one. Matching more than one lists the candidates instead of guessing.
projectIdstringProject UUID. Omit if you pass `project`.
undoOperationIdstringReceipt id from a prior updateProject write. Restores the captured prior fields. With preview=true, inspects the receipt instead.

No output schema declared.

No examples provided.

Common questions

What is the Bucky MCP server?

Bucky is an MCP server listed in the public MCP registry as com.buckybuild/bucky. Zoning, parcel, and development feasibility for a street address in Canada and the US. This page covers its hosted endpoint (https://buckybuild.com/api/mcp).

Is the Bucky MCP server safe to use?

Bucky scores 84 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the Bucky MCP server expose?

Bucky exposes 11 tools: getBuckyMcpGuide, explainFeasibilityStatus, getFeasibilitySnapshot, runFeasibilityAnalysis, getProjectContext, and 6 more. Their descriptions and schemas cost roughly 3,783 tokens of context every time the server is loaded.

Does the Bucky MCP server require authentication?

No. We connected to Bucky without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the Bucky MCP server still maintained?

Bucky is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.