Tacit MCP (ucl-sbde/tacit-mcp) is an MCP server listed on the M8ven Trust Index. It scores 68 out of 100, grade C. It declares 4 tools. No publisher has claimed this listing.

C
Caution
68/100

Tacit MCP

Connects AI assistants to Tacit building digital twins to query buildings, equipment, sensors, and zones using natural language. It provides tools for exploring Brick-compliant knowledge graphs, fetching historical sensor data, and accessing site documents.

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

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Who stands behind it

ucl-sbde

Source: Glama

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Install from

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
⚠️
Known vulnerabilities in dependencies: 2 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
4 tools verified — handlers match their declared behaviour
4 read-only tools verified — handlers contain no write/delete/exec
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: TACIT_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes4 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

tacit_list_files

List documents and files associated with a site. Returns metadata for files uploaded to a site: spec sheets, maintenance documents, BIM source files, 3D models, and knowledge graph data. Useful for answering questions like "What documentation exists for this building?" or "Are there spec sheets fo

tacit_graphql
tacit_list_sites

List all building sites the current API key has access to. Each site represents a physical location (building, campus, warehouse) managed in Tacit. Sites are the top-level container. You need a site ID to query buildings, equipment, points, zones, and systems. Returns: Array of sites with id, name

tacit_timeseries

Query historical or live sensor data for one or more points. Points are identified by their timeseriesId (UUID). Use tacit_graphql first to find points and their timeseriesId values. Args: - site_id (string, required): The site ID - point_ids (string, required): Comma-separated timeseriesId UU

// known CVEs in dependencies2 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.6.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.6.1GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configHOST0.0.0.0 Bind address
configMCP_PATH/mcp MCP endpoint path
🔐 secretTACIT_API_KEY"": "your-api-key"
configTACIT_API_URLNo https://app.betacit.com API base URL (for self-hosted deployments)
configTACIT_OAUTH_ISSUERSet to enable OAuth 2.1 mode
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deployPORT
// quality suggestions

Tool inputs are validated

3/4 tool handlers declare input schemas (75%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tests exist

No test files found

Add tests that exercise each declared tool.

Secrets not logged

1 secret value sent to console.log

Redact or omit secret values from log output.

Production dependencies are patched

0 critical, 2 high severity in production deps — @modelcontextprotocol/sdk@1.6.1 (high), @modelcontextprotocol/sdk@1.6.1 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Domain consistency

npm scope @tacit doesn't match GitHub owner ucl-sbde

Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
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commit: 53772936854c8ab2b9c64e270c4301210cca2395
code hash: acbd8ee14bc7514042a32e026108066a4e9072ca2252609f5c85ac8e4d2bd89f
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