Now live on Product Hunt →

Type 3 words.
Get a production-ready prompt.

Prompt Packer is an MCP server that turns vague ideas like write a login function into detailed, structured prompts — with error handling, security, tests, and validation baked in. Works right inside Claude Code, Cline, Cursor, and MiMo Code.

Install in 30 seconds See how it works
No API key needed to start
3 free optimizations / day
Open source (MIT)
prompt-packer · optimize
You type
▋
Prompt Packer expands it into
Optimized prompt

Works natively with the tools you already use

Features

Everything you need to prompt like a senior engineer

Stop hand-writing 200-word prompts. Prompt Packer adds the structure, edge cases, and quality bar that makes AI-generated code actually ship.

AI-Powered Optimization

Transforms one line into a detailed, structured prompt covering error handling, security, validation, and testing requirements.

7 Smart Templates

Auto-detect picks the right one, or choose Code, Debug, Docs, Refactor, Architecture, or General for tailored output.

Cloud Prompt Library

Save, search, and reuse your best prompts. Synced across every device and every editor.

Batch Processing

Optimize dozens of prompts in one call. Perfect for backlogs, refactors, and multi-file work.

Works Everywhere

Any MCP-compatible tool — Claude Code, Cline, Cursor, MiMo Code, and anything built on the Model Context Protocol.

No Keys to Manage

The AI runs on our servers. One Prompt Packer key is all you need — no provider accounts or API keys to juggle.

How it works

From half a thought to a complete prompt

Four steps. No copy-pasting into a browser tab — it all happens inside your editor.

01

Install once

A single npm install -g prompt-packer-mcp puts the MCP server on your machine.

02

Connect your tool

Add one small JSON block to Claude Code, Cline, Cursor, or MiMo Code settings. Done.

03

Type your idea

Write write a login function. Prompt Packer intercepts and expands it.

04

Ship better code

Your AI now receives a senior-grade prompt — with security, tests, and edge cases baked in.

The difference

Same model. Wildly different output.

The prompt is the only thing that changed. Here's what a senior-grade prompt looks like next to a vague one.

Without Prompt Packer 
> write a login function

// the model guesses. it usually:
//  - forgets rate limiting
//  - stores passwords in plain text
//  - skips input validation
//  - has no tests
//  - ships a vulnerability
With Prompt Packer 
You are a senior software architect.
Generate a production-ready login function:

• Input validation & sanitization
• bcrypt password hashing
• JWT token generation & refresh
• Rate limiting & brute-force protection
• SQL injection prevention
• Unit + integration tests
• Comprehensive error handling
• Security logging & audit trail
Templates

One for every job

Seven purpose-built templates. auto picks the right one for you.

⚡
auto
Auto-detects the best template. The default — and usually right.
🔨
code
New features, functions, components — built to ship.
🐞
debug
Find and fix bugs with a methodical, reproducible flow.
📖
docs
Documentation, READMEs, and guides that don't lie.
♻️
refactor
Improve structure, naming, and quality — without behavior change.
🏛️
arch
System design, trade-offs, and scalability planning.
✨
general
Any other prompt enhancement you can think of.
Quick start

Up and running in 30 seconds

Install the server, drop one config block into your editor, done.

1 · Install

bash 
npm install -g prompt-packer-mcp

2 · Get an API key (optional — free tier needs no key)

The free tier (3 optimizations/day) works with no key at all. To unlock higher limits and the prompt library, message our bot to grab a paid plan:

@prompt_packer_subscription_bot

3 · Connect your editor

~/.claude/settings.json

That's it. Start typing — Prompt Packer does the rest.

Pricing

Start free. Upgrade when it pays for itself.

Pay once a month in USDT. Cancel anytime. Every plan includes all templates and the prompt library.

Free
$0/mo
Try it forever
  • 3 optimizations / day
  • 3 saved prompts
  • 4 basic templates
  • Basic optimization
Start free
Starter
$9/mo
For the daily driver
  • 150 optimizations / day
  • 99 saved prompts
  • All 7 templates
  • Search your library
  • Batch processing
Choose Starter
Most popular
Pro
$29/mo
For serious builders
  • 500 optimizations / day
  • Unlimited saved prompts
  • Advanced prompts
  • Few-shot examples
  • Priority processing
Choose Pro
Team
$149/mo
For squads & agencies
  • 1,000 optimizations / day
  • Unlimited saved prompts
  • Highest quality prompts
  • Priority support
Choose Team

Plans are billed monthly in USDT (TRC20). Message @prompt_packer_subscription_bot on Telegram to subscribe.

FAQ

Questions, answered

Do I need my own AI API key?
No. The optimization runs on our servers — you only need a Prompt Packer API key. Nothing else to sign up for or manage.
Can I use it without paying?
Yes. The free plan gives you 3 optimizations per day, forever. No credit card required to sign up.
Is my data safe?
Optimization itself doesn't keep your input — prompts are processed and discarded. The only thing we store is what you explicitly save to your prompt library (so you can reuse it across devices), and you can delete any saved prompt at any time.
Which editors does it support?
Anything that speaks MCP — Claude Code, Cline, Cursor, and MiMo Code today, plus any future MCP-compatible tool.
How do payments work?
Plans are paid monthly in USDT (TRC20) through our Telegram bot. Send payment, share the transaction hash, and your API key arrives instantly.
Is the code open source?
The MCP client is MIT-licensed open source on GitHub. The optimization engine runs as a managed service.

Stop writing prompts.
Start writing code.

Join the developers letting Prompt Packer do the prompt engineering, so they can focus on shipping.

View on npm Star on GitHub