Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Optimizes Manus AI credit usage by 30-75% via intelligent model routing and smart testing.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
Pick the AI app you use, then copy the settings.
You need
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"credit-optimizer": {
"command": "uvx",
"args": [
"mcp-credit-optimizer"
]
}
}
}Run this in your terminal
claude mcp add credit-optimizer -- uvx mcp-credit-optimizerPaste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"credit-optimizer": {
"command": "uvx",
"args": [
"mcp-credit-optimizer"
]
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Paste into .vscode/mcp.json in your project
{
"servers": {
"credit-optimizer": {
"type": "stdio",
"command": "uvx",
"args": [
"mcp-credit-optimizer"
]
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Runs on your computer; the tool list appears in your AI app after you install it.
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
The registry name was verified with the GitHub account rafsilva85, which owns the repo
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
This one runs on your computer; there is no internet endpoint
Runs on your computer and uses local settings instead
Runs on your computer; we can only read tool lists from internet endpoints
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
The registry does not list a required key, though some servers ask you to sign in on first use.
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
The GitHub repo last changed –, and the latest version (5.2.0) reached the registry 8 months ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.
In the same category: Spec Driven Development, Remote Desktop Commander, Date Math
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Exact date/time math for agents: business days, holidays, time zones, cron, RRULE, SLA. x402 paid.
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Zero downsides. 47% average savings. Pays for itself in ~36 prompts.
Audited across 53 adversarial scenarios. Quality Veto Rule: if it can't save without loss, it doesn't touch your task.
Get it: Landing Page · Gumroad ($12) · Power Bundle ($12) · SkillFlow Free MCP Server: PyPI · Smithery
Dev.to · PulseMCP · Smithery · MCPServers.org · Agensi.io · Indie Hackers · Awesome Manus AI
Manus charges credits per task. Most users waste 30–75% because of four default behaviors:
| Problem | What Happens | Waste |
|---|---|---|
| Wrong model routing | Simple tasks run in Max mode when Standard produces identical results | Up to 5x overpay |
| Slow browser navigation | Each page takes 8–45 seconds via browser tool calls, burning credits on wait time | 150+ seconds per 10 URLs |
| No chat detection | Tasks that cost $0 in Chat Mode (Q&A, brainstorm, translation) run in Agent Mode | 100% overpay |
| Context bloat | Tokens accumulate across steps — each subsequent step costs more than the last | Exponential growth |
These aren't bugs. They're default settings. The Power Stack overrides all four.
This is the most important thing to understand:
The Power Stack can never make things worse. It has a hardcoded Quality Veto Rule: if an optimization would reduce output quality by even 1%, it skips that optimization entirely. In the worst case, it does nothing. In the best case, it saves you 75%.
There is no scenario where installing the Power Stack produces a worse result than not having it.
Analyzes every prompt before execution and decides the cheapest path that delivers identical quality.
Replaces slow browser tool calls with a programmatic toolkit.
Credit Optimizer decides what to optimize. Fast Navigation decides how fast to execute it. Together, they multiply:
| Metric | Without Stack | With Stack | Improvement |
|---|---|---|---|
| Simple Q&A cost | Full price | $0 (Chat Mode) | 100% saved |
| 10-URL research | 150+ seconds | 1.3 seconds | 115x faster |
| Web scraping task | Full credits | 33% of original | 67% saved |
| Full-stack web app | Full credits | 40% of original | 60% saved |
| Research report | 12 minutes | 2 minutes | 6x faster |
| Average across all tasks | Baseline | 47% less | 47% saved |
The Power Stack costs $9 one-time (or $12 for the bundle with Fast Navigation). Here's how fast it pays for itself:
| Plan | Monthly Cost | 47% Wasted | Daily Waste | Payback |
|---|---|---|---|---|
| Plus ($39/mo) | 6,500 cr/day | ~3,055 cr/day | ~$0.44/day | ~20 prompts |
| Max ($99/mo) | 16,250 cr/day | ~7,637 cr/day | ~$0.92/day | ~10 prompts |
| Teams ($79/user/mo) | Varies | ~47% | Varies | 1–2 days |
After payback, every prompt saves you money. For the rest of your Manus subscription. Forever.
Annual savings estimate: ~$500–$1,000+ depending on usage.
~/skills/credit-optimizer/ and ~/skills/fast-navigation/pip install mcp-credit-optimizer
python -m mcp_credit_optimizer
Add to your MCP config:
{
"mcpServers": { "credit-optimizer": { "command": "python", "args": ["-m", "mcp_credit_optimizer"] } } }
Works with Claude Desktop, Cursor, Windsurf, Copilot, and any MCP-compatible client.
Why pay when the MCP server is free? The MCP server saves credits when you remember to call it. The Manus Skill saves credits on every single prompt automatically — no manual invocation needed. The Skill also includes Fast Navigation (115x speed boost), which is not available as MCP.
All 53 test scenarios pass with zero quality degradation:
| Category | Scenarios | Quality Loss |
|---|---|---|
| Code generation (Python, JS, React, SQL) | 12 | 0% |
| Creative writing (blog, marketing) | 8 | 0% |
| Data analysis (CSV, JSON, API) | 7 | 0% |
| Research (multi-source synthesis) | 6 | 0% |
| Translation & localization | 5 | 0% |
| Bug fixing & debugging | 5 | 0% |
| Documentation generation | 5 | 0% |
| Mixed-intent tasks | 5 | 0% |
*"Everyone hates the Manus credit-based system. It's insane how fast credits burn."* — Reddit, 90 upvotes
*"I used 100,000 credits in a week and a half. That's my entire monthly allocation gone."* — Reddit
*"Manus is so expensive it's absurd. $200/month and credits still run out."* — Reddit
The Power Stack exists because these frustrations are real — and fixable.
| Channel | URL |
|---|---|
| Landing Page | creditopt.ai |
| Buy Individual ($9) | Gumroad |
| Buy Bundle ($12) | Gumroad |
| SkillFlow | skillflow.builders |
| PyPI (Free MCP) | pypi.org |
| Smithery | smithery.ai |
| PulseMCP | pulsemcp.com |
| Awesome List | github.com/rafsilva85/awesome-manus-ai |
MIT — see LICENSE for details.
Built by [Rafael Silva](https://github.com/rafsilva85) · creditopt.ai