Chassis

io.github.dvd90Published by GitHub account dvd90v0.1.2Updated Oct 24, 2026

Scaffold an Express 5 + TypeScript backend: database, auth, optional Next.js front end.

VerifiedSTDIODesktop onlyProductivity & WorkflowDeveloper Tools

Overview

AI-generated overview

Chassis scaffolds Express 5 + TypeScript backends, letting an assistant create a typed, linted project with a chosen database, auth provider and optional Next.

What you can do
List the available presets, databases, auth providers and add-ons, validated against the underlying CLI's supported options before anything runs. Scaffold a new backend project into a new or empty directory and report its layout, API root and next commands. Read the generated project's coding conventions for controllers, responses, errors, validation and definition of done. Optionally produce a fullstack workspaces monorepo with an API and Next.js front end, auth wired on both sides and declined modules removed.
When to use it
Use it when you want an assistant to go from a stack description such as an API with Postgres and auth to a project that already typechecks, lints and tests green, without knowing the CLI's flags. It is for starting new projects, not for working with an existing codebase.
Requirements
Runs as a local stdio process, typically launched with npx, so Node.js and npm are needed. Network access is required because project creation downloads the template from GitHub. No accounts, API keys or environment variables are declared.
Before you install
Creating a project writes files to disk and downloads a template from GitHub. A non-empty target directory is refused, so nothing is overwritten. Dependency installation is off by default and must be run separately or requested explicitly. This server creates projects; it is not the MCP server that exposes a generated project's own API.

Installation

In SourceWeft

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

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

chassis-mcp

An MCP server that scaffolds Chassis backends — a decorator-driven Express 5 + TypeScript starter with an optional database, auth provider and Next.js front end.

It lets an agent go from "build me an API with Postgres and auth" to a project that already typechecks, lints and tests green, without knowing the CLI's flags.

Install

Point your MCP client at the package. No global install needed:

json
{  "mcpServers": {    "chassis": {      "command": "npx",      "args": ["-y", "chassis-mcp"]    }  }}
Where that file lives
  • Claude Desktop — claude_desktop_config.json
  • Claude Code — claude mcp add chassis -- npx -y chassis-mcp
  • Cursor — .cursor/mcp.json
  • VS Code — .vscode/mcp.json

Tools

ToolWhat it does
list_chassis_optionsThe presets, databases, auth providers and add-ons on offer. Call it first when the stack isn't decided.
create_chassis_projectScaffolds into a new or empty directory and reports the layout, the API root and the next commands.
chassis_conventionsHow to write code in the result — controllers, responses, errors, validation, definition of done.

The option list is imported from create-chassis, not restated here, so this server can't advertise a stack the CLI doesn't support. An unsupported value is rejected with the list of valid ones before the CLI runs.

Example

Build me an API with Postgres, JWT auth and a Next.js front end, in ./shop

list_chassis_options       → sees `fullstack`, and that web=true implies a monorepocreate_chassis_project     → { directory: "./shop", preset: "fullstack" }                           ← { monorepo: true, apiRoot: "apps/api", nextSteps: [...] }chassis_conventions        → reads ./shop/AGENTS.md before writing any code

What lands is a workspaces monorepo with apps/api and apps/web, auth wired on both sides, and only the modules that were chosen — declined ones are removed from the source and from package.json.

Notes

  • Nothing is overwritten. A non-empty target directory is refused.
  • install defaults to false because it's slow; run npm install yourself, or pass install: true.
  • Creating a project downloads the template from GitHub, so it needs network access.
  • This is not the MCP server inside a generated project (npm run mcp), which exposes that project's API as tools. This one creates projects.

MIT · source · docs

Source: mcp-server/README.md at commit fae8662

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.1.2LatestSep 16, 2026

Score

50% of the applicable checks met

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  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts