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@getfacade/mcp

@getfacade/mcp

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by getfacade

@getfacade/mcp

MCP server for GetFacade.ai: an agent creates a building, uploads a photo of it, gets the exterior designed, priced and documented, without a human in front of a screen.

Each design is worked out for the country the building stands in: materials that are applicable there, manufacturer products that are actually sold there, and the technical build-up behind the surface. The render shows that on the photo of the house.

The estimate and the album come from the same design:

  • The estimate prices it line by line, in materials and labour, at what those materials cost in that country.

  • The album documents it for the crew that builds it: the build-up of the facade, safety notes and the norms behind them.

The server is a thin wrapper over the public GetFacade API. It stores nothing, caches nothing and decides nothing: every rule (pricing, admission, the colour grammar, every message) stays on the server, and the wrapper only carries calls and answers.

Connect by URL

Most clients connect without installing anything. Add a custom connector with this URL and sign in to your GetFacade account when asked:

https://app.getfacade.ai/mcp
  • Claude (claude.ai and desktop): Settings → Connectors → Add custom connector.

  • Claude Code: claude mcp add --transport http getfacade https://app.getfacade.ai/mcp

  • ChatGPT, Cursor, VS Code and other MCP clients: add a remote (HTTP) server with the same URL.

On the sign-in screen you set a spend cap for the connection. It spends tokens from the agent wallet of your account and never buys tokens on its own. The connection appears among your agent keys in the app, where it can be revoked at any time.

A photo attached to a chat has no link the connector can read. create_building returns photos_page, the building's photo page in the app: add the photo there, and list_photos picks it up. A direct public link to an image works with upload_photo as well.

Related MCP server: Estimaite MCP Server

Run locally

The package below runs the same tools on your own machine with an agent key. Use it for automation, or when the photos are files on that machine.

Requirements

  • Node.js 20+

  • An agent API key. Issue one for yourself at app.getfacade.ai → Account → Settings → API. The value is shown once and cannot be recovered; each key carries a hard spend cap.

  • Agent access is paid. There are no trial credits in it: the key spends from the agent wallet, and without a balance the first paid call is refused with an explanation. An active Pro Plan fills that wallet up to 1,000 credits once per billing period; past that, credits are bought.

Setup

Claude Desktop / any MCP client, mcpServers section:

{
  "mcpServers": {
    "getfacade": {
      "command": "npx",
      "args": ["-y", "@getfacade/mcp"],
      "env": { "GETFACADE_API_KEY": "your-key" }
    }
  }
}

To run a checkout instead of the published package, point the client at it: "command": "node", "args": ["/path/to/mcp/src/index.js"].

Variable

Required

Default

GETFACADE_API_KEY

yes

—

GETFACADE_API_BASE_URL

no

https://api.getfacade.ai/api/v1

GETFACADE_LANG

no

en

Messages, including refusals, come from the service in the language of GETFACADE_LANG. Set it to the language the answer should be read in.

Tools

Tool

What it does

create_building

Creates a building. The name is unique per account. Say where it stands, or the place is inferred from the connection the call arrives on.

upload_photo

Takes a file path (local) or an image link (URL connection). Registers the file, uploads the bytes, confirms, waits for the answer: a view to design from, a drawing or reference kept with the building, or a refusal with the reason.

list_photos

The views of a building, including photos added in the app. view_id is what start_design takes.

start_design

Creates a design and queues its render. Returns a job id.

refine_design

Changes a finished design in words. Every step after the first.

get_job

Polls one render, estimate or album.

list_jobs

Recent jobs across the account, unfinished first.

list_designs

Designs of a building with their renders and finished picture.

order_estimate

Orders a cost estimate for chosen renders.

order_album

Orders the PDF album for chosen renders.

upscale_render

Enlarges a finished render. Costs tokens, asynchronous.

get_estimate

The estimate itself: totals, assumptions and every line.

add_estimate_line

Adds one line to an estimate.

update_estimate_line

Edits one line of an estimate.

delete_estimate_line

Removes one line from an estimate.

delete_render

Deletes one render. The main render's design returns to draft.

delete_design

Deletes one design with the renders under it.

delete_building

Deletes a building with everything under it.

list_token_packages

The packages this account can buy.

buy_tokens

Refills this key's wallet. Local package only. See below.

get_balance

Agent wallet, key cap, and whether the next paid call will be accepted.

report_problem

Reports a defect in this API. Free, and works on an empty wallet.

Rendering is asynchronous: start_design, refine_design, order_estimate and order_album return a job id immediately, and get_job reports when it is done. A finished estimate reads ready where a render and an album read completed. The only call that waits is upload_photo, which polls until the answer is in.

A paid call is never ordered twice

start_design, refine_design, order_estimate, order_album and upscale_render cost money, and the charge follows the job that gets created. If one of them times out, the honest question is whether the job exists, and the agent cannot answer it from where it stands.

So this server answers it instead. Every paid call goes out under a name of its own (Idempotency-Key), and this server, not the agent, retries it under that same name when the connection fails or when the API says the first attempt is still running. The API recognises the repeat and hands back the original job, so a timeout costs one design, not two.

Nothing about this reaches the tool arguments: ordering the same design twice on purpose stays possible, because two calls are two names. What is gone is the accidental second order.

The API requires that name on every paid call made with an API key, so calling it without this wrapper means sending the header yourself. The reference is at getfacade.ai/agents.

What the key can reach

A key is a bearer secret that lives in your agent's config, so its reach is the published agent surface and nothing else: buildings, photos, designs, renders, estimates, albums, the jobs list and the API wallet. Anything outside that answers 403 AGENT_SURFACE_FORBIDDEN, including the account's own sign-in settings, its subscription and its payment history. Changing those, and issuing or revoking keys, is done by a person signed in to the app.

The reference is at getfacade.ai/agents.

A finished render (result_url, main_render_url) and a finished album (result_url) are served from stable URLs: no signature, no expiry. An assistant can hand one straight to a person as the answer to "show me the result", with nothing to refresh and no second call.

The honest half of that: because the link is unsigned it asks nobody for permission, so it keeps working for whoever it is forwarded to, and it cannot be recalled afterwards. Share it as deliberately as any other link that is public forever. GET /renders/{render}/download is a different thing — a short-lived signed URL with a filename, for saving the file rather than for sharing it.

Deletions are soft on the server: a person can undo them in the app, this server cannot.

buy_tokens works only if the key was issued with purchasing enabled (a switch on the issue screen), and only up to what the key may still spend — a purchase never lifts the key's own spend cap. It answers charged when the payment provider took it from a saved payment method, or requires_human with a checkout_url for a person to open. Either way the tokens are credited when the payment is confirmed, so poll get_balance.

Issuing keys and buying a subscription are deliberately absent: a key that can issue itself a key has no ceiling, and a subscription is bought by a person, in the app.

License

MIT (see LICENSE) — this wrapper carries calls and answers and nothing else, so there is nothing in it to keep closed. The GetFacade service it talks to is a separate matter: using it is governed by the terms at getfacade.ai/terms, and a key is issued to an account, not to this package.

Development

npm install
npm test    # smoke test against a stub of the API

test/live-journey.mjs drives the whole journey through a real MCP client against a real API with a real key. It is not part of npm test, because it spends actual credits; the header of the file says how to run it.

Releases: see RELEASING.md.

Available Tools

21 tools
add_estimate_lineAdd a line to an estimateA

Add one line to a generated estimate. unit must be a display code of the estimate's own measurement system — read an existing line to see which codes it uses rather than guessing. Totals are recomputed by the server.

Inputs: name (required), section (required), quantity (required), unit_price (required), +3 more.

buy_tokensBuy tokens for this keyA

Buy one token package for this key's wallet. Only works if the key was issued with purchasing enabled, and only up to what the key may still spend — a purchase cannot lift the key's own spend cap. The answer says charged when the payment provider took it from the saved payment method, or requires_human with a checkout_url a person has to open. Either way the tokens arrive asynchronously: poll get_balance.

Inputs: package (required).

create_buildingCreate a buildingA

Create a building (a house to design). The name must be unique within the account, max 50 characters — reusing a name is refused, so pick a distinct one instead of retrying the same. goals is the free-form brief (max 10000 chars).

Inputs: name (required), goals, construction_region.

delete_buildingDelete a buildingA
DestructiveIdempotent

Delete a building with everything under it: photos, designs, renders, estimates and albums. Deletion is soft on the server side and can be undone by a person in the app; this tool cannot undo it. Tokens already spent are not refunded.

Inputs: building_id (required).

delete_designDelete a designA
DestructiveIdempotent

Delete one design (concept) of a building, with the renders under it. Deletion is soft on the server side and can be undone by a person in the app; this tool cannot undo it.

Inputs: design_id (required), building_id (required).

delete_estimate_lineRemove a line from an estimateA
DestructiveIdempotent

Remove one line from a generated estimate. Totals are recomputed by the server.

Inputs: line_id (required), estimate_id (required).

delete_renderDelete a renderA
DestructiveIdempotent

Delete one render. Deleting the main render of a design returns that design to draft, so it can be rendered again without creating a new one. Deletion is soft on the server side and can be undone by a person in the app; this tool cannot undo it.

Inputs: render_id (required).

get_balanceCheck the agent walletA
Read-only

What this key can still spend: the api-scope balance of the account and the cap of this key. is_admissible is the server's own answer to "will the next paid call be accepted" — read it instead of comparing the numbers yourself.

Inputs: no named parameters.

get_estimateRead an estimateA
Read-only

The finished estimate: its totals, the area and duration it assumes, and every line with its quantity, unit and price. This is the only way to see what was estimated — get_job reports the status of an estimate, never its content. The unit of a line is the display code to reuse in add_estimate_line.

Inputs: estimate_id (required).

get_jobCheck one jobA
Read-only

Poll one queued job. kind says what it is: a render, an estimate, or an album (albums are listed per design, so an album lookup needs design_id). The finished status differs by kind: a render and an album read completed, an estimate reads ready. Stop polling on any of those and on failed, where error says what went wrong and error_code names it; repeat that reason as it stands instead of composing one. A render and an album report expected_seconds, how long that job usually takes end to end, so the wait between polls can be paced by it; an estimate does not, and reads null. The result_url of a finished job is a permanent public link: no signature, no expiry, so it can be handed to a person as it stands. It also keeps working for anyone it is forwarded to and cannot be recalled, so pass it on as deliberately as any other shared link.

Inputs: job_id (required), kind, design_id.

list_designsList designs of a buildingA
Read-only

All designs of a building with their renders. This is where the render ids for order_estimate, order_album and refine_design come from — main_render_id is the finished render of a design, null while nothing has finished, and main_render_url is its permanent public link (no signature, no expiry, safe to hand to a person, and not recallable once shared). Per-render state is not here: poll get_job for that.

Inputs: building_id (required).

list_jobsList recent jobsA
Read-only

Recent jobs across the account — renders, estimates and albums in one list, unfinished ones first. Use it to catch up after a restart: each row carries the kind and design_id that get_job asks for, and the building_id the job belongs to. Use get_job to poll a single known job.

Inputs: kind, limit.

list_token_packagesList the token packagesA
Read-only

The packages this account can buy, with their price and how many tokens each carries. Read this before buy_tokens instead of assuming a ladder — the packages and their prices change.

Inputs: no named parameters.

order_albumOrder a PDF albumA

Document the design as a PDF album (the blueprint document) for the renders you name: the materials, the build-up of the facade, safety notes and the regulatory references behind them. This is the document a crew builds from. Name the estimate_id of the estimate whose prices belong in it: without one the album takes the newest finished estimate of the design, which is not necessarily the one that was just ordered. Requires a completed main render on that design, otherwise the API refuses with an explanation. requirements is not honoured on every account: when it is not, the album is still made and notices says so, in the API's own words. The finished album is a permanent public link, so it can be handed to a person as it stands, and it stays readable for anyone it is forwarded to.

Inputs: design_id (required), render_ids (required), language, estimate_id, +3 more.

order_estimateOrder a cost estimateA

Price the design, line by line, in materials and labour, for the renders you name. The figures come from the design itself: what the specified materials and build-up cost in this country. Currency and measurement system default to the building's country and the written text to the account language; do not guess any of them, omit them unless the caller asked for a specific one. The money follows the house, the words follow the reader: a building in one country can be priced in its own currency and still be written up in the language the person asking reads.

Inputs: design_id (required), render_ids (required), building_id (required), currency, +3 more.

refine_designRefine a designA

Revise a finished design in words: "put a canopy over the front door", "make the roof darker". The revision is applied to the finished design, so what is not mentioned stays as it is — this is the tool for every step after the first, not start_design. Give it either the render_id of the picture to change (the job id start_design returned) or the design_id (with building_id) of the design whose finished main render should be changed. The parent render must be finished; refining an unfinished one is refused. Queues a render and returns a new job id, plus the design_id the result lands in (the server keeps every step as its own design, so the previous picture is never overwritten). Styles, colors and brands are optional here: pass them only to change them.

Inputs: instruction (required), seed, colors, design_id, +5 more.

report_problemReport a problem with this APIA

Report something wrong with this API itself: a field that is documented but never arrives, a refusal whose wording leaves no way forward, a call that only works on the second try, a result that does not match what was asked for. Free, and it works on an empty wallet, so a refusal can be reported the moment it happens. This is not the way to reach a person about an account or a charge, and no reply comes back through it; what comes back is a reference to quote. Say what was attempted, what was expected and what happened instead, and put the tool name and the ids in context so the report can be traced.

Inputs: message (required), context, category.

start_designStart a design renderA

Design the exterior of this house on a chosen view, and show the result as a picture. The design is worked out against the building's country: which materials are applicable there, which manufacturer products are really sold there, and what the build-up behind the surface is — the render is how that decision is shown, not a picture made for its own sake. Creates a new design (concept) and queues the work; returns a job id to poll with get_job. prompt is the free-form wish for this design ("a modern facade with a wide porch"). Colors accept the same strings the apps use: "palette:1", "paint:412", "siding:88@double-4-dutchlap" or "#RRGGBB" — order carries the 60/30/10 role, the first entry is the dominant wall color; brand_selections names real manufacturer products: "siding:brand:12", "siding:line:40@double-4-dutchlap", "paint:product:412". Omit seed unless reproducing an earlier render. To change a design that already rendered, use refine_design instead of starting another one.

Inputs: view_id (required), building_id (required), seed, colors, +4 more.

update_estimate_lineEdit a line of an estimateA
DestructiveIdempotent

Change one line of a generated estimate — its name, quantity, unit, unit price, category or section. Only the fields passed are changed. Totals are recomputed by the server.

Inputs: line_id (required), estimate_id (required), name, unit, +4 more.

upload_photoUpload a photo of the buildingA

Upload an exterior photo of the building and wait for it to be validated. Three legs: register the view, PUT the bytes to storage, confirm. Validation is asynchronous; the result says whether the photo was accepted, and a rejected photo cannot be rendered. The wait is bounded: a pending answer means validation is still running, and calling this again with the same file resumes it on the same view rather than uploading a second copy.

Inputs: file_path (required), building_id (required), wait_for_validation.

upscale_renderUpscale a renderA

Enlarge a completed render to a higher resolution. Costs tokens like a render and runs asynchronously: poll the returned job with get_job. A render that is already upscaled, or not finished yet, is refused by the API with an explanation.

Inputs: render_id (required).

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    TDQS

    A4.1/5.0

    Scored across 21 tools

    Disambiguation5/5

    Each tool targets a distinct resource or action: jobs are polled with get_job, renders are listed through list_designs, new designs use start_design and revisions use refine_design. Even adjacent tools like order_estimate and order_album are clearly separated by output.

    Naming Consistency5/5

    All tool names follow a consistent snake_case verb_noun pattern: list_*, create_*, get_*, delete_*, *_design, and *_estimate. The vocabulary is uniform and predictable.

    Tool Count3/5

    21 tools is on the heavy side for a single server, and several resources have many small operations such as the estimate line CRUD. That said, each tool has a defensible role, and the breadth comes from the multi-stage facade workflow.

    Completeness4/5

    The core lifecycle is well covered: building creation, photo upload, starting and refining designs, rendering, estimating, reversing, albums, and token management. Minor gaps remain, such as no list_buildings or update_building, but an agent can work around them.

    Maintenance

    ActivitySlowing
    ResponsivenessNo recent community issues

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