# Delta MCP

> Delta MCP is a free app that sits between your AI and its MCP servers: one program per task instead of one tool call per step.

- Free, with no account.
- Coming soon for macOS, Windows and Linux; runs on your computer. The command is `mcpdelta`; the site is mcpdelta.com.
- Finds 12 AI apps (Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Gemini CLI, Cline, LM Studio and 4 more), switches 10 of them over for you (Codex and Zed are set up by hand for now), and works with any MCP server.
- Your AI does each task as one program: checked before the first call, applied all or nothing, read back, kept in Activity and undoable.
- 3.3 to 24.1 times fewer tokens on multi-step tasks, measured with Claude Code and Sonnet 5.5; a single one-step question costs more.
- Not open source.
- Contact: contact@mcpdelta.com.

Delta MCP is not related to Delta Lake, Edge Delta, Delta Air Lines or Delta Exchange. Every English page below has a plain Markdown version; all of them in one file: https://www.mcpdelta.com/llms-full.txt

## Start here
- [Delta MCP](https://www.mcpdelta.com/index.md): Delta MCP is a free app between your AI apps and their MCP servers. One program per task, not one tool call per step: 3.3–24.1× fewer tokens, measured.
- [How it works](https://www.mcpdelta.com/how-it-works.md): Your AI writes each MCP task as one typed program instead of calling tools one by one. Delta MCP checks it, applies it all or nothing, and keeps it in Activity.
- [Benchmarks](https://www.mcpdelta.com/benchmarks.md): Delta MCP vs direct MCP calls on eight scenarios in Claude Code: 3.3–24.1× fewer tokens on multi-step tasks, plus cost, model calls, speed and the method.
- [Security and privacy](https://www.mcpdelta.com/security.md): Delta MCP runs on your computer. Your tools, tasks and history never leave it. Payments always ask you, and every change is recorded and undoable.
- [Privacy policy](https://www.mcpdelta.com/privacy.md): What the Delta MCP website collects and why: no cookies, a click counter that can’t follow you, and your email used once to tell you the app is out.
- [Pricing](https://www.mcpdelta.com/pricing.md): Yes, Delta MCP is free: every feature, no account, no limit on servers. Supporters can help from $5 a month and get beta versions and a Discord community.
- [Download](https://www.mcpdelta.com/download.md): Delta MCP, the free app that makes MCP faster, cheaper and undoable, is coming soon for macOS, Windows and Linux. Leave your email to hear the day it’s out.

## Guides
- [Guides](https://www.mcpdelta.com/guides.md): Straight, sourced answers about MCP: why it costs tokens, where each AI app keeps its servers, what Claude Code limits mean, and MCP vs CLI.
- [How to reduce MCP token usage, and why MCP burns tokens](https://www.mcpdelta.com/guides/reduce-mcp-token-usage.md): How to reduce MCP token usage: measure it with /context, see the two costs (tool menu and round trips), and compare every fix, Tool Search included.
- [Claude Code usage limit reached? What your MCP servers cost](https://www.mcpdelta.com/guides/claude-code-usage-limit-mcp.md): What Claude Code's "You've hit your limit" means (session, weekly, Opus, spend), how /usage shows what your MCP servers cost, and what to cut first.
- [MCP config file locations: Claude, Cursor, VS Code and more](https://www.mcpdelta.com/guides/mcp-clients.md): Where Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Gemini CLI and Codex keep their MCP config: file path, JSON key, remote servers and tool limits.
- [MCP vs CLI for AI agents: where the token bill comes from](https://www.mcpdelta.com/guides/mcp-vs-cli.md): MCP or CLI for your AI agent? What each costs in tokens, what the measurements show, when a CLI wins, when MCP does, and where code beats both.

## Docs
- [Docs home](https://www.mcpdelta.com/docs.md): Everything about Delta MCP: install it in two minutes, use Activity, Undo and shortcuts, and learn what your AI sees and how it writes a task.
- [Quickstart](https://www.mcpdelta.com/docs/quickstart.md): Install Delta MCP, let it find the MCP servers your AI apps use, and switch them over in two minutes. Everything can be put back in one click.
- [Supported AI apps and MCP clients](https://www.mcpdelta.com/docs/supported-apps.md): The 12 AI apps (MCP clients) Delta MCP finds on your computer, including Claude, Cursor and VS Code, how each is switched over, and the two you set up by hand.
- [Connectors](https://www.mcpdelta.com/docs/connectors.md): The MCP servers Delta MCP serves to your AI, and how to see them, sign in, choose which apps use them and put them back.
- [Modes](https://www.mcpdelta.com/docs/modes.md): How much your AI may change on its own, connector by connector. Four modes, single actions set apart, and how a question reaches you.
- [Activity and Undo](https://www.mcpdelta.com/docs/activity-and-undo.md): Every task your AI does, with each change before and after, and how Undo puts things back or tells you what it can't.
- [Shortcuts](https://www.mcpdelta.com/docs/shortcuts.md): Keep a task that worked, run it again with or without your AI, share it as a file, and trust one that comes from someone else.
- [Put everything back](https://www.mcpdelta.com/docs/put-everything-back.md): Return every AI app to exactly how it was before Delta MCP, from Settings or a terminal, and see what is and isn't undone.
- [The three tools](https://www.mcpdelta.com/docs/three-tools.md): The only three tools your AI sees from Delta MCP: delta, delta_read and delta_apply. What each one does, and when your AI uses which.
- [Writing a task](https://www.mcpdelta.com/docs/writing-a-task.md): How your AI writes a task as one program, and what Delta MCP checks before the first call: types, errors, the plan, all or nothing, read back and Undo.
- [Documents](https://www.mcpdelta.com/docs/documents.md): Deep objects, such as a test with steps and actions, read and rewritten as a few lines of text. How it works, and the rule that keeps it safe.
- [Shortcuts in code](https://www.mcpdelta.com/docs/shortcuts-in-code.md): How a program keeps a task that worked as a shortcut, how any AI calls it in one line, and how you run it again, share it or trust one from elsewhere.
- [The Delta MCP skill](https://www.mcpdelta.com/docs/delta-skill.md): The small skill file that tells your AI to prefer Delta MCP over direct tools. What it says, word for word, and why its description never changes.
- [The mcpdelta command line](https://www.mcpdelta.com/docs/cli.md): Every mcpdelta command at a glance: diagnose, use, restore, undo and more. What each one does, its options, and which one to use when.
- [Switch and put back](https://www.mcpdelta.com/docs/cli-switch.md): See what your MCP servers cost, move them behind Delta MCP and put them back, from a terminal. Each plan is shown before anything changes.
- [Modes and payments](https://www.mcpdelta.com/docs/cli-modes.md): See and set what your AI may change on its own, connector by connector, and check the payments switch, from a terminal.
- [History and undo](https://www.mcpdelta.com/docs/cli-history.md): Read the journal of what Delta MCP did, undo a task by its id and see what Delta MCP did in place of your AI, from a terminal.
- [Run shortcuts from the command line](https://www.mcpdelta.com/docs/cli-shortcuts.md): List your kept shortcuts and run one again without AI, for 0 tokens, by hand, in a scheduled task or in a script.
- [The text form](https://www.mcpdelta.com/docs/cli-text-form.md): What the command line offers for the text form of deep objects: compile a server, check the round trip on real objects and serve it as documents.
- [Troubleshooting](https://www.mcpdelta.com/docs/troubleshooting.md): What to check when a server doesn’t show up, a tool is missing, a change didn’t apply or an AI app doesn’t go through Delta MCP.
- [Where your data lives](https://www.mcpdelta.com/docs/data.md): Where Delta MCP keeps its files on your computer, what is protected, what never leaves it, the short list of what does, and how to erase it all.
- [Uninstall Delta MCP](https://www.mcpdelta.com/docs/uninstall.md): Remove Delta MCP and leave your AI apps as they were. Put everything back, restart your AI apps, then delete the app and its data.
- [Frequently asked questions](https://www.mcpdelta.com/docs/faq.md): Short answers about Delta MCP: is it free, is it open source, does it change your MCP servers, where your data goes, undo, payments and how to stop.

## Languages
- [中文](https://www.mcpdelta.com/zh/llms.txt): Delta MCP 是一款免费应用，位于你的 AI 和它的 MCP 服务器之间：每个任务一个程序，而不是每一步一次工具调用。
- [हिन्दी](https://www.mcpdelta.com/hi/llms.txt): Delta MCP एक मुफ़्त ऐप है, जो आपके AI और उसके MCP सर्वर के बीच बैठता है: हर कदम पर एक टूल कॉल की जगह, हर काम के लिए एक प्रोग्राम।
- [Español](https://www.mcpdelta.com/es/llms.txt): Delta MCP es una app gratuita que se sitúa entre tu IA y sus servidores MCP: un programa por tarea en lugar de una llamada a una herramienta por paso.
- [العربية](https://www.mcpdelta.com/ar/llms.txt): Delta MCP تطبيق مجاني يعمل وسيطًا بين الذكاء الاصطناعي لديك وخوادم MCP التي يستخدمها: برنامج واحد لكل مهمة، بدل استدعاء أداة في كل خطوة.
- [Français](https://www.mcpdelta.com/fr/llms.txt): Delta MCP est une app gratuite qui se place entre votre IA et ses serveurs MCP : un programme par tâche au lieu d’un appel d’outil par étape.
- [বাংলা](https://www.mcpdelta.com/bn/llms.txt): Delta MCP একটি ফ্রি অ্যাপ, যা আপনার এআই আর তার MCP সার্ভারগুলোর মাঝখানে বসে: প্রতি ধাপে একটি টুল কলের বদলে প্রতি কাজে একটি প্রোগ্রাম।
- [Português](https://www.mcpdelta.com/pt/llms.txt): O Delta MCP é um app gratuito que fica entre sua IA e seus servidores MCP: um programa por tarefa em vez de uma chamada de ferramenta por etapa.
- [Bahasa Indonesia](https://www.mcpdelta.com/id/llms.txt): Delta MCP adalah aplikasi gratis yang berada di antara AI Anda dan server MCP-nya: satu program per tugas, bukan satu panggilan tool per langkah.
- [اردو](https://www.mcpdelta.com/ur/llms.txt): Delta MCP ایک مفت ایپ ہے جو آپ کے اے آئی اور اس کے MCP سرورز کے درمیان رہتی ہے: ہر قدم پر ایک ٹول کال کے بجائے، ہر کام کے لیے ایک پروگرام۔
- [Русский](https://www.mcpdelta.com/ru/llms.txt): Delta MCP — бесплатное приложение, которое работает между вашим ИИ и его MCP-серверами: одна программа на задачу вместо одного вызова инструмента на каждый шаг.
- [Deutsch](https://www.mcpdelta.com/de/llms.txt): Delta MCP ist eine kostenlose App, die zwischen Ihrer KI und ihren MCP-Servern sitzt: ein Programm pro Aufgabe statt eines Tool-Aufrufs pro Schritt.
- [Italiano](https://www.mcpdelta.com/it/llms.txt): Delta MCP è un’app gratuita che sta tra la tua IA e i suoi server MCP: un programma per task invece di una chiamata a uno strumento per passaggio.
- [Nederlands](https://www.mcpdelta.com/nl/llms.txt): Delta MCP is een gratis app die tussen je AI en de bijbehorende MCP-servers zit: één programma per taak in plaats van één toolaanroep per stap.
- [Ελληνικά](https://www.mcpdelta.com/el/llms.txt): Το Delta MCP είναι μια δωρεάν εφαρμογή που βρίσκεται ανάμεσα στο AI σας και στους MCP servers του: ένα πρόγραμμα ανά εργασία αντί για μία κλήση εργαλείου ανά βήμα.

## Optional
- [Full text of this site](https://www.mcpdelta.com/llms-full.txt): every page above in one Markdown file
- [News feed (Atom)](https://www.mcpdelta.com/feed.xml): announcements, including the release