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longbook

Official registry AI and agents

Your longbook of bills, subscriptions and expenses, for your AI to read and to suggest changes to.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http longbook 'https://longbook.app/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "longbook": {
            "type": "http",
            "url": "https://longbook.app/mcp"
        }
    }
}
NPM package @longbook/mcp
Claude Code 
claude mcp add longbook -- npx -y @longbook/mcp@1.40.4 --vault
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "longbook": {
            "command": "npx",
            "args": [
                "-y",
                "@longbook/mcp@1.40.4",
                "--vault"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. longbook
  2. Status
  3. Layout
  4. License

longbook

A financial memory for your AI. longbook keeps your recurring money — subscriptions, insurance, EMIs, school fees, domains, renewals — as a meticulous, machine-readable memory that the AI you already use can read, fill, and build on. Your AI gathers from your statements and emails; longbook remembers, checks, and shows you every change for approval.

  • Native apps for iPhone and Mac (SwiftUI), one $38 purchase with a 7-day refund, one purchase unlocks every platform; longbook Cloud, $4 a month, covers what uses the server.
  • Your data is a folder of plain files you own — self-describing (llms.txt + a JSON Schema), synced through your own iCloud Drive.
  • Designed so it cannot hold secrets: no card numbers, no CVVs, no credentials — the schema and validators refuse them, which is what makes everything else safe.
  • Connects to your AI over MCP — locally for desktop AI apps, hosted for ChatGPT and phones.

Site: longbook.app · Contact: contact@longbook.app

Status

The domain engine (packages/core), the Swift data layer (packages/swift-core), the accounts and entitlements backend (supabase/) and the native app (apps/longbook) are all in place; the app runs on both platforms and ships through App Store Connect. Docs describe what exists today.

Layout

PathWhat it is
packages/coreThe domain engine — dates, money, selectors, insights, the data-policy scanner; pure TypeScript, no runtime deps
packages/swift-coreThe same data layer in Swift, as a multiplatform package (iOS 17+, macOS 14+) shared by both app targets
packages/swift-designThe design system — colour, type, spacing, and the SwiftUI pieces both apps draw with
packages/mcpThe MCP server — the memory's read and write tools over stdio for the AI on the owner's machine, and the engine behind the hosted twin at longbook.app/mcp, which reads the pushed copy and takes writes as proposals
packages/cardsSelf-contained HTML cards over the same numbers — the design system's tokens, exported once, feeding a second renderer
supabase/Accounts, trial clock, entitlements, purchases, the hosted MCP and hosted copy, statement reading, report sharing
apps/longbookThe native SwiftUI app — one target building for iOS and macOS, with the Home Screen widget
apps/longbook-siteThe static site at longbook.app — the pages, the guide and schema at stable addresses, and the edge functions behind /mcp and shared reports
docs/Architecture · Vault format · Agentic tools · Building · Contributing

License

GPL-3.0. Copyright © 2026 Rohit Kundliwal. Contributions are accepted under the licence grant in contributing. The longbook name and mark identify this project's own releases.

Frequently asked questions

What is longbook?

Your longbook of bills, subscriptions and expenses, for your AI to read and to suggest changes to.

How do I install longbook?

It runs as a remote server. In Claude Code: claude mcp add --transport http longbook 'https://longbook.app/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does longbook need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is longbook open source?

Yes. Its code is on GitHub under the GPL-3.0 license.

Who maintains longbook?

It is published by MXmaster2s. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.