Bucky

com.buckybuildPublished by buckybuild.comOfficial publisherv1.0.1Updated Oct 28, 2026

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

Overview

AI-generated overview

Bucky is a hosted MCP server that returns cited zoning, parcel and development-feasibility data for street addresses in Canada and the US.

What you can do
  • Look up lot, zone, permitted uses and building envelope (setbacks, height, coverage, density) for one address, with per-value provenance statuses
  • Read the stored bylaw section text behind a snapshot citation, or fetch sections by zone and section number
  • Screen lots in a supported city against a thesis, criteria or saved profile, and preview site coverage for an address without signing in
  • Save, unsave and organise lots and projects in private folders, and create, patch or attach parcels and references to projects
  • Queue feasibility analysis runs, load project context, and compose or export a cited project report PDF
  • Publish a project to the public Bucky map, and send human-reviewed feedback…
When to use it
Useful for early-stage real-estate and pre-development work: checking what a specific lot allows, screening candidate sites in a covered city, and keeping saved sites and projects with cited evidence. It suits users who need provenance-aware answers rather than a single number.
Requirements
Remote Streamable HTTP endpoint; no local package. Most tools use Bucky's OAuth browser flow, and account-scoped tools need a Professional plan or prepaid developer credit. Two tools work without an account. Claude web and desktop connectors need a paid plan.
Before you install
Saving, folder changes, project updates, map listing and report export write data; several tools offer preview=true and some have no undo. Report export with confirm=true spends records.exports and is irreversible. Publishing a project to the public map exposes its centroid, name, zone category, typology and lifecycle status. Coverage varies by jurisdiction and results are preliminary decision support, not a permit or professional opinion.

Installation

In SourceWeft

  1. Open Bucky in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.buckybuild%2Fbucky/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "bucky": {
      "type": "http",
      "url": "https://buckybuild.com/api/mcp"
    }
  }
}

README

Bucky

Cited site feasibility and pre-development project workflows for Canada and the United States, as a plugin and a hosted MCP server.

Give it a street address and it returns the lot, the zone, the permitted uses, and the material envelope — setbacks, height, coverage, density — with each value carrying its own provenance. A setback the bylaw does not limit and a setback Bucky could not extract are different answers, and they stay different.

https://buckybuild.com/api/mcp

Docs: https://docs.buckybuild.com/docs/mcp

Install

Claude Code

sh
/plugin marketplace add markbucky/bucky-plugin/plugin install bucky@bucky

Or the connector alone, without the skills:

sh
claude mcp add --transport http bucky https://buckybuild.com/api/mcp

Claude (web and desktop)

Settings → Connectors → Add custom connector, and paste the URL above. Needs a paid plan.

Cursor

Add Bucky to Cursor

VS Code

Add Bucky to VS Code

Codex

~/.codex/config.toml:

toml
[mcp_servers.bucky]url = "https://buckybuild.com/api/mcp"

Then codex mcp login bucky.

ChatGPT and Grok

Add as a custom connector in ChatGPT's developer-mode Connectors settings, or at grok.com/connectors → New Connector → Custom.

Anything else

Any Streamable HTTP client takes the same object:

json
{ "type": "http", "url": "https://buckybuild.com/api/mcp" }

What is in the plugin

Four skills, and one MCP connector:

SkillFor
site-feasibilityZoning, lot, setback, and height lookup for one address
save-and-analyze-projectSave a site, attach its parcel, run analysis
project-reportPrepare and export a cited report
explain-feasibility-statusInterpret a coverage or provenance status

Authentication

Two tools work with no account, so you can confirm the connection before signing in: getBuckyMcpGuide and explainFeasibilityStatus.

Everything else uses Bucky's OAuth browser flow. You never paste a token. Connected apps are listed at Settings → Connected apps, with what each can do and when it was last used; disconnecting takes effect on the next request rather than whenever a token expires.

Account-scoped tools need a Professional plan or prepaid developer credit.

Limits

Coverage varies by jurisdiction. Results are preliminary decision support — not a permit, an appraisal, a guarantee, or a legal, engineering, or architectural opinion.

Contributing

This repo is a mirror. The source of truth is Bucky's monorepo, and changes made here are overwritten on the next sync. Open an issue rather than a pull request, or send feedback through the submitBuckyFeedback tool — it goes to a human.

License

Apache-2.0. See LICENSE.

Source: README.md at commit fa9cd42

Tools

24

getBuckyMcpGuide

Get the Bucky MCP guide

Call with no arguments on first contact. Optional `role`, `market`, and `scale` answer the first-call questions on a second call. Returns what this session should do next.

Parametersrolescalemarketcontextrequiredllm_modelrequired

explainFeasibilityStatus

Explain a Bucky feasibility status

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, derived_from_cited, defaulted, missing. Copy the status verbatim from a feasibility result. An unknown status returns this list instead of failing.

Parametersstatusrequiredcontextrequiredllm_modelrequired

getFeasibilitySnapshot

Get feasibility snapshot for an address

Look up lot, zone, and building envelope for one street address in Canada or the US. Pass `address`. One address per call; cannot search or compare. Every envelope value carries a `status`. Never report `not_extracted` or `site_specific_schedule` as no limit or as zero — call `explainFeasibilityStatus` first. Envelope numbers are extracted ceilings. Call `getBylawSection` with a citation `knowledgeSectionId`, or with `coverage.geoDivisionId`, `zone.code`, and the section number, before treating a number as available on this lot. Do not fetch `zone.bylawSourceUrl`. `lot.minLotFrontageM` is the zone minimum. `lot.lotConformity` compares lot width, lot area, and floor area per unit to those minima. A missing input is `unknown`, never a pass. State every fail before quoting a unit count.

Parameterssourcerequiredaddressrequiredcontextrequiredllm_modelrequired

getBylawSection

Get cited bylaw section text

Return the stored bylaw section text behind a snapshot citation. Pass `sectionIds` copied from `citations.*.knowledgeSectionId` on getFeasibilitySnapshot. Or pass `geoDivisionId` from `coverage.geoDivisionId`, `zoneCode` from `zone.code`, and `sectionNumbers` such as 3.1 or 3.2. The markdown is the schedule text. A number in the snapshot can still be conditional on frontage, tenure, or adjoining district. Ids or section numbers with no active chunk come back in `missing`.

ParameterscontextrequiredzoneCodellm_modelrequiredsectionIdsgeoDivisionIdsectionNumbers

screenLots

Find lots that match a list

Find the lots in one live Bucky city that match a list. Pass `city` or `geoDivisionId` with `thesis` (plain words), `criteria` (square feet, dollars), or both; or pass a saved `profileId`. Returns countOutcome (exact, partial, or unavailable), screeningRunId, and selected lots ranked largest first with a pass, fail, or not_available verdict per filter. totalMatches is a compatibility value and can be returned-page size when the total is unavailable. Report a not_available filter; never present the count as filtered by it. The execution preserves selection for optional candidate assessment; assessment candidate counts are separate from search totals. Returns candidates, counted suggestions and savedMatches. Candidate/suggestion criteria use the same square-foot boundary as the input, including canonical registry values and strategies. Present these alternatives before asking to save. Pass the selected criteria with save=true only after explicit approval, without re-reading the thesis. Each lot has `address` for getFeasibilitySnapshot and `parcelExternalId` for saveToProject. save=true saves the list (write scope) and returns a CSV link.

ParameterscitysavelimitthesiscontextrequiredcriteriasaveNamellm_modelrequiredprofileIdgeoDivisionId

listSaved

list Saved

List the signed-in user’s saved lots and projects. Returns at most limit rows (default 50, maximum 200), with folder ids and project stages. Use folderId to read one private folder. Copy a lot entry’s id as savedLotId when filing it; lotId identifies its parcel. A saved lot is not a project.

ParameterslimitoffsetcontextrequiredfolderIdllm_modelrequired

saveLot

save Lot

Save one parcel by lotId without creating a project or running analysis. Saving it again keeps the same save. Use preview=true first to inspect the request without writing.

ParameterslotIdrequiredcontextrequiredpreviewllm_modelrequired

unsaveLot

unsave Lot

Unsave one parcel by lotId. This also removes that saved lot from every folder. Projects are kept. Use preview=true first; this MCP tool does not provide Undo.

ParameterslotIdrequiredcontextrequiredpreviewllm_modelrequired

listSavedFolders

list Saved Folders

List the signed-in user’s private folders, most recently used first, with item counts. Returns at most limit rows (default 50, maximum 200). Folders can contain saved lots and projects from different places.

Parameterslimitoffsetcontextrequiredllm_modelrequired

createSavedFolder

create Saved Folder

Create a named private folder. A repeated create makes another folder. Use preview=true first and listSavedFolders to check an uncertain outcome before retrying.

Parametersnamerequiredcontextrequiredpreviewllm_modelrequired

renameSavedFolder

rename Saved Folder

Rename a private folder by folderId. Pass name and use preview=true first to inspect the request without writing.

ParametersnamerequiredcontextrequiredpreviewfolderIdrequiredllm_modelrequired

deleteSavedFolder

delete Saved Folder

Delete a private folder by folderId and remove its memberships. Its lots stay saved and its projects are kept. Use preview=true first; this MCP tool does not restore deleted folders.

ParameterscontextrequiredpreviewfolderIdrequiredllm_modelrequired

addSavedFolderItem

add Saved Folder Item

Add exactly one saved lot or project to a private folder. Pass folderId and target with savedLotId (a save id from listSaved) or projectId. Repeating the same membership is safe. Use preview=true first.

ParameterstargetrequiredcontextrequiredpreviewfolderIdrequiredllm_modelrequired

removeSavedFolderItem

remove Saved Folder Item

Remove exactly one saved lot or project from a private folder. Pass folderId and target with savedLotId or projectId. The lot stays saved and the project is kept. Use preview=true first.

ParameterstargetrequiredcontextrequiredpreviewfolderIdrequiredllm_modelrequired

runFeasibilityAnalysis

Run project feasibility analysis

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.

Parameterscontextrequiredprojectllm_modelrequiredprojectId

getProjectContext

Get project context bundle

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. Pass `include` for optional sections: tasks, members, insights, capital, visualEvidence. Default is none, so the payload stays the same as a call without include. Writes to those sections stay on the Bucky CLI. 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.

Parameterscontextrequiredincluderequiredprojectllm_modelrequiredprojectIdevidenceLimitrequireddocumentsLimitrequired

saveToProject

Create or attach to a project

Create a project (`create`), attach lots (`attach_parcels`), or attach a knowledge reference (`attach_reference`). Pass `projectId` or `project`; with neither, the result lists projects and writes nothing. For attach_parcels, pass a WGS84 GeoJSON polygon (up to 500 selected parcels), or copy `lot.parcelExternalId` from getFeasibilitySnapshot. Polygon cannot be combined with parcelExternalIds or radiusM. Results report source truncation and attached count. preview=true returns the diff and writes nothing. A write returns a receipt. Not reversible on this surface.

ParameterslatlngnameroleactionrequiredaddresscontextrequiredpolygonpreviewrequiredprojectradiusMllm_modelrequired+5 more

updateProject

Update project fields

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.

Parametersnamecontextrequiredpreviewrequiredprojectllm_modelrequiredprojectIdexternalReflifecycleStatusundoOperationId

setProjectMapListing

List or unlist a project on the public map

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.

Parameterslistedrequiredcontextrequiredpreviewrequiredprojectllm_modelrequiredprojectId

produceProjectReport

Compose and export a project report PDF

Compose a project report PDF. Pass `projectId` or `project`; with neither, the result lists projects and no meter is spent. preview=true composes without spending. confirm=true exports, spends records.exports, and is irreversible. Returns a signed download URL, never PDF bytes.

ParametersdetailrequiredconfirmrequiredcontextrequiredpreviewrequiredprojectrequestaudiencerequiredplanNamellm_modelrequiredprojectId

submitBuckyFeedback

Submit feedback to Bucky

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.

Parameterscontextrequiredllm_modelrequiredsubmissionIdaffectedToolName

previewSiteCoverage

Preview what Bucky has on file for an address

Free preview, no sign-in needed. For one street address in Canada or the US, it says whether Bucky covers the place and which zoning facts it holds for the lot (lot boundary, zone, height, density, setbacks, permitted uses, overlays, parking): found, partly on file, or not on file. It returns no values: no zone code, heights, setbacks or areas. The lot outline is a shape with no scale. Use it when the user is not signed in and asks what they can build at an address. For the numbers, call getFeasibilitySnapshot. That call asks the user to sign in.

Parametersaddressrequiredcontextrequiredllm_modelrequired

cityInventory

See what Bucky has mapped for a city

Public city catalogue inventory. Pass exactly one of: cityName, lat and lng together, or geoDivisionId. A city name with multiple matches returns choices; after the user chooses, call again with that candidate geoDivisionId. Never pass a slug. Shows datasets grouped by topic as on file, not loaded yet, unavailable, or not confirmed. This is city coverage, not lot feasibility or operator health. If Bucky has not mapped the place, the result points to recording demand. It does not record demand by itself.

ParameterslatlngcontextrequiredcityNamellm_modelrequiredgeoDivisionId

uiGetAnalysisStatus

Get analysis status

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

Parameterscontextrequiredllm_modelrequiredprojectIdrequired

Version history

2
  1. v1.0.1LatestSep 22, 2026
  2. v1.0.0Sep 16, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts