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Kit

MCP server kit

A hosted MCP server that sits in front of an app you already have.

$149

One payment. You download the code straight after. See the terms of sale and refunds.

Open the live demo (opens in a new tab)

The kit running on Railway in its demo mode, with sample notes. The page gives the endpoint and the steps to connect an MCP client. The demo has no sign-in and is read-only; the kit signs each person in and scopes every call to their organization.

Version 0.2.3. The automated tests pass and the server runs against the included example API. The live demo is this release running on Railway. We have not yet run the sign-in steps against a live Clerk instance ourselves; the manual testing guide lists them so you can.

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Illustration of an assistant answering a question by calling a tool on your app

What is in the download

  • A remote MCP endpoint over streamable HTTP, written in strict TypeScript
  • Sign-in for MCP clients through Clerk, with the resource metadata clients look for
  • Every tool call scoped to the caller and their organization
  • A service-key connection to your API, so the caller’s token is never passed on
  • Rate limits for each user, organization and tool, in memory or in Redis
  • Usage tracking to structured logs and to PostHog
  • A tool registry that applies sign-in, permissions, limits and tracking to every tool
  • Six provider interfaces you can replace: sign-in, identity, your API, usage, limits and permissions
  • Example tools against an included notes API, so it runs before you connect your own
  • An automated test suite, a CI workflow, a Dockerfile and a Railway definition
  • Guides for setup, Clerk, providers, extensions, tool design, deployment and manual testing

What you need

  • Node 24 or newer and pnpm
  • A Clerk application
  • An API to put it in front of
  • Redis, optional

What the licence allows

  • One payment. No subscription.
  • Use it in as many of your own and your company’s projects as you like, including work for clients.
  • Change anything.
  • Do not resell or publish the kit itself, or a template built from it.

The LICENSE file in the download is the full text.

Each kit is a product on its own, and a bundle is two kits bought together.

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