Contract Gate MCP Server

Semantic Contract Enforcement at Ingestion - Patent Pending Stop bad data before it reaches your warehouse, lakehouse, or ML pipeline. It runs locally over stdio via the published package.

People who work with Contractgate and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Rust.

VERIFIED ACTIVE

LAST COMMIT 2026-09-17 · ★ 3 · #134 OF 153 MAINTAINED CLOUD INFRASTRUCTURE · VERIFIED 2026-09-18

MIT · Rust servers · how we verify → /methodology

01 · Install Contract Gate

before you install - you'll need

Set CONTRACTGATE_API_KEY before connecting.

Claude Code

claude mcp add nightmoose-contractgate -- npx -y @contractgate/mcp-server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "nightmoose-contractgate": {
      "command": "npx",
      "args": [
        "-y",
        "@contractgate/mcp-server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package @contractgate/mcp-server - the @contractgate scope differs from the repo owner (nightmoose); confirm it's the project's official package

registry namespace io.github.nightmoose is GitHub-verified and matches the repo owner

03 · What Contract Gate can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.1.0 · 2026-04-28

ContractGate v0.1.0 · Semantic Contract Enforcement at Ingestion - Patent Pending · ContractGate is a high-performance validation gateway that stops bad data before it reaches your warehouse, lakehouse, or ML pipeline.…

04 · Who maintains Contract Gate

ContractGate is maintained by nightmoose. It's the only MCP server we track from this author; the repo dates to Apr 2026.

05 · Facts

repository: github.com/nightmoose/contractgate
website: https://app.datacontractgate.com/mcp-reference.md
category: cloud infrastructure - ranked #134 of 153 actively-maintained cloud infrastructure servers as of 2026-09-18.
registry: io.github.nightmoose/contractgate (active, first published 2026-09-17)
packages: npm:@contractgate/mcp-server

06 · Contract Gate FAQ

What is Contract Gate?

Semantic Contract Enforcement at Ingestion - Patent Pending Stop bad data before it reaches your warehouse, lakehouse, or ML pipeline. It runs locally over stdio via the published package.

Is Contract Gate still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-17. We re-verify nightly.

How do I install Contract Gate?

Run `npx -y @contractgate/mcp-server`. The README documents one environment variable (CONTRACTGATE_API_KEY) to set first. Set CONTRACTGATE_API_KEY before connecting. You can also paste the ready-made client config above.

Does Contract Gate run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Contract Gate

Alternatives to Contract Gate

Maintained cloud infrastructure servers if Contract Gate isn't the fit.

Pairs well with

Servers that cover what Contract Gate doesn't - only shown when the pairing reason fits the companion.

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