# IFC Viewer Online (npm · ifc-viewer-mcp)

IFC/BIM with a 3D viewer: validate IFC, check IDS, Health Score, drawings, digital twins.

- Trust score: 64/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-04

## Components

- npm · `ifc-viewer-mcp`: 64/100 (this document), [markdown](https://verifymcp.io/servers/j03rul4nd-ifc-viewer-mcp/ifc-viewer-mcp.md), [page](https://verifymcp.io/servers/j03rul4nd-ifc-viewer-mcp/ifc-viewer-mcp)

## Channel facts

- Registry: `npm`
- Package: `ifc-viewer-mcp`
- Version: `1.0.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-04.

- **Supply Chain Security**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 95 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 48/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 68/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1754 tokens (~175/item across 10 items; 10 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 99/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 96% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the IFC Viewer Online MCP server?

IFC Viewer Online runs locally as an npm package, launched with npx -y ifc-viewer-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add j03rul4nd-ifc-viewer-mcp -- npx -y ifc-viewer-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "j03rul4nd-ifc-viewer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "ifc-viewer-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "j03rul4nd-ifc-viewer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "ifc-viewer-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add j03rul4nd-ifc-viewer-mcp -- npx -y ifc-viewer-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "j03rul4nd-ifc-viewer-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "ifc-viewer-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add j03rul4nd-ifc-viewer-mcp --command npx --arg -y --arg ifc-viewer-mcp
```

### Hermes

```yaml
mcp_servers:
  j03rul4nd-ifc-viewer-mcp:
    command: "npx"
    args: ["-y", "ifc-viewer-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "j03rul4nd-ifc-viewer-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "ifc-viewer-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add j03rul4nd-ifc-viewer-mcp -t stdio -c npx -a -y ifc-viewer-mcp
```

### Other

```json
{
  "mcpServers": {
    "j03rul4nd-ifc-viewer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "ifc-viewer-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-03 (score 64, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-11-02 (score 49)

First indexed and scored.

## MCP tools (10)

### `validate_ifc` (~194 tokens)

Validate an IFC file and get its Health Score

Check an IFC (BIM) model against the IFC Viewer Online rule set — schema, spatial structure, names, GlobalIds, ISO 19650, classification, MEP and more — and return its Health Score (0–100, higher is better), issue counts, the rules that cost the most points and the first issues with links to fix guides. Runs locally on this machine; the file is not uploaded anywhere. Use it when the user asks whether a model is OK, what is wrong with it, or how good it is.

Input parameters:

- `maxIssues` (integer): How many issues to list (the counts always cover all of them).
- `rules` (array): Run only these rule ids (see list_validation_rules). Default: the viewer's default rules.
- `source` (string, required): Path to a local file (absolute, or relative to where the server runs) or a public http(s) URL.

### `list_validation_rules` (~49 tokens)

List the IFC validation rules

List every rule validate_ifc can run: its id, category, severity and whether it is on by default. Use it to pick rules for validate_ifc or to explain what a rule checks.

### `check_ids` (~140 tokens)

Check an IFC file against IDS requirements

Check an IFC model against an IDS file (buildingSMART Information Delivery Specification 1.0) and return, per specification, pass/fail, how many elements applied, passed and failed, and the first failures with the element and the reason. Runs locally; nothing is uploaded. Use it when the user has an .ids file, or exchange requirements to verify a delivery against.

Input parameters:

- `ids` (string, required): The IDS: local path, public URL, or the IDS XML text itself.
- `ifc` (string, required): The IFC model: local path or public http(s) URL.
- `maxFailures` (integer): Failures to list per specification.

### `open_in_3d_viewer` (~352 tokens)

Open IFC models in the 3D viewer

Build a link that opens one or more public IFC files in the free IFC Viewer Online 3D viewer (runs in the browser: orbit, section, measure, properties, validation with Health Score badge). Optional: drop them on the city map, isolate a class, pick a camera view, open a floor plan in the drawings pane, add point clouds. Also returns an <iframe> to embed the same view in a web page, wiki or dashboard. Use it whenever the user wants to see, show, share or embed a model in 3D. Give the link to the user to click; this tool does not open a window by itself.

Input parameters:

- `isolate` (string): Show only this IFC class, e.g. IfcWall, IfcDoor, IfcSpace.
- `lang` (string): Interface language: en, es, ca, fr, de, it, pt, ja, zh or th.
- `map` (boolean): Place the models on the 3D city map at their own georeference.
- `models` (array, required): Public http(s) URLs of IFC files. Several URLs load together as one federated scene. Local paths do not work here: the browser has to download the file.
- `scans` (array): Public point-cloud URLs (LAS/LAZ/E57/PLY…) to load with the models.
- `ui` (string): Interface preset: full (all panels), minimal, kiosk (no chrome), client (read-only for clients), article (for embedding in pages).
- `validate` (boolean): Run validation after loading (default true).
- `view` (string): Camera view once the models load.

### `open_drawings` (~177 tokens)

Open technical drawings next to a model

Build a link that opens IFC models with the drawings pane beside the 3D view and a floor plan already cut from the model. In that pane the user can also drop DXF or PDF drawings, place them over the model, calibrate the scale, compare plan against model, add dimensions and text, and export to DXF, SVG or PDF. Use it when the user wants a 2D plan, to check a drawing against the model, or to mark up a sheet.

Input parameters:

- `lang` (string): Interface language: en, es, ca, fr, de, it, pt, ja, zh or th.
- `models` (array, required): Public http(s) URLs of IFC files. Several URLs load together as one federated scene. Local paths do not work here: the browser has to download the file.

### `read_dxf` (~146 tokens)

Summarise a DXF drawing

Read a DXF drawing (ASCII, R12 to current) and summarise it: DXF version, units, layers with how many entities each, entity types, drawing extents and the text found on it (room names, labels, title block). Runs locally. Use it to tell what a drawing contains before placing it next to a model with open_drawings. DWG is detected but not read: ask the user to save it as DXF.

Input parameters:

- `maxTexts` (integer): How many text strings to return.
- `source` (string, required): Path to a local file (absolute, or relative to where the server runs) or a public http(s) URL.

### `open_3d_sketch` (~102 tokens)

Open the 3D sketch studio

Link to the 3D sketch studio: draw strokes in 3D space with a pen, finger or mouse — over a blank canvas or around a model — on a phone, tablet, foldable or desktop, and export to SVG, PSD, ORA or Blender. Free, in the browser, no account. Use it when the user wants to sketch an idea, mark up a design in 3D or make a concept drawing.

### `list_digital_twins` (~115 tokens)

List live digital twin scenes

List the ready-made city digital twins (Barcelona, Helsinki, Tokyo): georeferenced IFC models on terrain and the OpenStreetMap city, painted with live open data (bikes, EV chargers, traffic, air quality, trains). Each has a link and an embed link. Also returns the link to the twin builder, where the user builds their own twin (AGV warehouse, import tracking) from a CSV or live feed. Use it when the user asks for a digital twin demo or wants to start one.

### `read_fiware_entities` (~253 tokens)

Read entities from a FIWARE context broker

Read entities from a FIWARE context broker (Orion, Orion-LD, Scorpio, Stellio) over NGSI-LD or NGSIv2 and return them as flat records (id, type, each attribute value with its unit, lat/lon, observedAt) — the same shape the viewer's twin panel binds to IFC elements. The request goes from this machine straight to the broker. Use it to see what live data a broker offers before linking it to a model.

Input parameters:

- `api` (string): ld = NGSI-LD, v2 = NGSIv2.
- `broker` (string, required): Broker root, e.g. https://orion.example.com:1026
- `context` (string): JSON-LD @context URL (NGSI-LD), for short attribute names.
- `limit` (integer): How many entities to return.
- `servicePath` (string): Fiware-ServicePath (NGSIv2 only).
- `tenant` (string): NGSILD-Tenant / Fiware-Service, if the broker uses one.
- `type` (string): Entity type, e.g. AirQualityObserved, ParkingSpot. NGSI-LD needs one.

### `search_port_library` (~138 tokens)

Search the Port de Barcelona IFC library

Search the Port de Barcelona BIM object library (cranes, bollards, fenders, signs, buildings… IFC, CC BY 4.0) by words and category. Each hit has its IFC download URL and a link that opens it in the 3D viewer. Use it when the user needs port or maritime infrastructure objects for a model or twin.

Input parameters:

- `category` (string): Only this category (the answer lists them).
- `limit` (integer)
- `query` (string): Words to look for in the object name, e.g. "grua", "bolardo", "crane". Empty lists everything.

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/j03rul4nd-ifc-viewer-mcp/ifc-viewer-mcp#diagnostics

## Score history

- 2026-11-04: 64
- 2026-11-03: 64
- 2026-11-02: 49

## Common questions

### What is the IFC Viewer Online MCP server?

IFC Viewer Online is an MCP server listed in the public MCP registry as io.github.j03rul4nd/ifc-viewer-mcp. IFC/BIM with a 3D viewer: validate IFC, check IDS, Health Score, drawings, digital twins. This page covers its npm package (ifc-viewer-mcp).

### Is the IFC Viewer Online MCP server safe to use?

IFC Viewer Online scores 64 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 4 November 2026. It declares no install or post-install scripts. 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 IFC Viewer Online MCP server expose?

IFC Viewer Online exposes 10 tools: validate_ifc, list_validation_rules, check_ids, open_in_3d_viewer, open_drawings, and 5 more. Their descriptions and schemas cost roughly 1,666 tokens of context every time the server is loaded.

### Is the IFC Viewer Online MCP server still maintained?

IFC Viewer Online is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the IFC Viewer Online MCP server under?

IFC Viewer Online declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/ifc-viewer-mcp
- Socket report: https://socket.dev/npm/package/ifc-viewer-mcp
- Repository: https://github.com/j03rul4nd/ifc-viewer-online
- Website: https://www.ifcvieweronline.eu/blog/ifc-mcp-server-claude-bim-3d-viewer/
- Changelog RSS feed: https://verifymcp.io/servers/j03rul4nd-ifc-viewer-mcp/ifc-viewer-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/j03rul4nd-ifc-viewer-mcp/ifc-viewer-mcp.json
- HTML version of this page: https://verifymcp.io/servers/j03rul4nd-ifc-viewer-mcp/ifc-viewer-mcp