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🏛️ Legends MCP

npm version License: MIT

Chat with legendary founders & investors in Claude. No API key required!

Ever wanted to ask Elon Musk about first principles? Get Warren Buffett's take on your investment? Have Steve Jobs roast your product design? Get Paul Graham and Marc Andreessen to debate your startup idea?

Now you can. With Party Mode, multiple legends can discuss your questions together!


✨ What's New in v1.4

Feature

Description

🎭 Party Mode

Multiple legends discuss your question together

🔮 Smart Suggest

Proactively recommends relevant legends

🎯 Auto Match

Deep analysis of which legends fit your topic

🔒 Security Fixes

Prompt injection protection, input sanitization


Related MCP server: polydev-ai

🚀 Quick Start

Claude Code (~/.claude/settings.json):

{
  "mcpServers": {
    "legends": {
      "command": "npx",
      "args": ["legends-mcp"]
    }
  }
}

That's it. No API key needed. Restart Claude Code and start chatting!


🎭 Party Mode - Multi-Legend Discussions

Ask complex questions and get perspectives from multiple legends:

You: "How should I approach raising my seed round?"

Claude: *Activates Party Mode with Paul Graham, Marc Andreessen, and Bill Gurley*

Paul Graham: "The best fundraising advice is: make something people want first.
Don't optimize for raising money. Optimize for building something users love..."

Marc Andreessen: "Software is eating the world, and VCs know it. Show us
the market size. Show us why NOW is the time..."

Bill Gurley: "Valuation is a vanity metric. What matters is finding partners
who truly understand your business..."

When Party Mode Activates

  • Complex questions with multiple valid perspectives

  • "Pros and cons" or "different viewpoints" requests

  • Debates between different schools of thought

  • Questions matching 2+ legends' expertise


🔮 Smart Suggest - Proactive Recommendations

The suggest tool analyzes your question and returns ready-to-execute actions:

User: "How do I build a crypto exchange?"

suggest() returns:
┌─────────────────────────────────────────────────┐
│ primary_action: {                               │
│   tool: "party_mode",                           │
│   params: {                                     │
│     question: "How do I build a crypto exchange"│
│     legends: ["cz-binance", "brian-armstrong"]  │
│   }                                             │
│ }                                               │
│                                                 │
│ suggested_actions: [                            │
│   { tool: "party_mode", ... },                  │
│   { tool: "summon_legend", id: "cz-binance" },  │
│   { tool: "summon_legend", id: "brian-armstrong"│
│   { tool: "auto_match", ... }                   │
│ ]                                               │
└─────────────────────────────────────────────────┘

Claude picks the best option and executes it!

👥 The Council of Legends (36 Total)

🚀 Tech Titans

Legend

Specialty

Elon Musk

First principles, physics thinking, building the impossible

Steve Jobs

Product design, reality distortion, user experience

Jeff Bezos

Day 1 thinking, customer obsession, long-term vision

Jensen Huang

GPUs, AI infrastructure, CUDA everything

Satya Nadella

Enterprise transformation, cloud, culture change

💰 Legendary Investors

Legend

Specialty

Warren Buffett

Value investing, compound interest, circle of competence

Charlie Munger

Mental models, multidisciplinary thinking, inversion

Ray Dalio

Principles, radical transparency, macro investing

Peter Thiel

Zero to one, contrarian bets, monopolies

Marc Andreessen

Software eating world, venture capital, tech optimism

🌱 Startup Sages

Legend

Specialty

Paul Graham

Essays, YC wisdom, making things people want

Sam Altman

Startups, AI/AGI, scaling companies

Naval Ravikant

Wealth creation, leverage, specific knowledge

Reid Hoffman

Network effects, blitzscaling, LinkedIn

Brian Chesky

Design thinking, Airbnb, company culture

⛓️ Crypto Builders

Legend

Specialty

CZ (Changpeng Zhao)

Exchange building, BUIDL, global expansion

Vitalik Buterin

Ethereum, smart contracts, crypto philosophy

Anatoly Yakovenko

Solana, proof of history, performance

Balaji Srinivasan

Network state, crypto predictions, tech trends

...and 17 more legends including Tim Ferriss, Gary Vaynerchuk, Tobi Lütke, and others!


🛠️ All Tools

Tool

Purpose

Example

suggest

🔮 Proactive recommendations

Analyzes your question, suggests best legend(s)

party_mode

🎭 Multi-legend discussion

Get 2-5 legends to discuss together

summon_legend

👤 Single legend advice

Channel one legend's perspective

auto_match

🎯 Deep legend discovery

Detailed analysis of which legends fit

list_legends

📋 Browse all legends

See all 36 available legends

search_legends

🔍 Find by keyword

Search by expertise, name, or topic

get_legend_context

📖 Deep dive

Get frameworks, principles, examples

get_legend_insight

💡 Quick wisdom

Get a concise insight on any topic


🔒 Security

v1.3+ includes security hardening:

  • ✅ Prompt injection protection - User context isolated from system prompts

  • ✅ Input sanitization - Detects and neutralizes injection attempts

  • ✅ Safe output encoding - JSON encoding prevents markdown injection

  • ✅ No CWD loading - Only loads bundled legends (opt-in for custom)

  • ✅ No external APIs - Zero network requests, zero data leakage


📊 How It Works

┌─────────────────────────────────────────────────────────────┐
│                    ARCHITECTURE                              │
├─────────────────────────────────────────────────────────────┤
│                                                              │
│   User Question                                              │
│        │                                                     │
│        ▼                                                     │
│   ┌──────────────────┐                                       │
│   │  suggest()       │  ← Analyzes question                  │
│   │  "Who can help?" │                                       │
│   └────────┬─────────┘                                       │
│            │                                                 │
│            ▼                                                 │
│   ┌──────────────────┐     ┌──────────────────┐             │
│   │  party_mode()    │ OR  │  summon_legend() │             │
│   │  (multi-legend)  │     │  (single legend) │             │
│   └────────┬─────────┘     └────────┬─────────┘             │
│            │                        │                        │
│            ▼                        ▼                        │
│   ┌──────────────────────────────────────────────┐          │
│   │           legends/*.yaml                      │          │
│   │  (36 bundled persona files - NO API calls!)  │          │
│   └──────────────────────────────────────────────┘          │
│            │                                                 │
│            ▼                                                 │
│   Claude adopts persona(s) and responds in character!       │
│                                                              │
└─────────────────────────────────────────────────────────────┘

Zero external APIs. Zero API keys. Just Claude + persona data.


🎯 Usage Examples

Get startup advice from multiple perspectives

"What's the most important thing for a first-time founder?"
→ Party Mode: Paul Graham + Sam Altman + Brian Chesky discuss

Deep dive on investing

"Should I invest in Bitcoin?"
→ Warren Buffett (skeptic) vs Balaji (bull) debate

Technical decisions

"How do I scale my database?"
→ Summon Jeff Bezos for Day 1 / SOA thinking

Life advice

"How do I build wealth?"
→ Naval Ravikant on leverage, specific knowledge, equity

⚙️ Environment Variables

Variable

Default

Description

LEGENDS_MCP_LEGENDS_DIR

(bundled)

Custom legends directory

LEGENDS_MCP_ALLOW_CWD

false

Allow loading from current directory

LEGENDS_MCP_DEBUG

false

Enable debug logging


⚠️ Disclaimers

⚠️ NOT affiliated with, endorsed by, or representative of any real individual
⚠️ NOT financial, legal, or professional advice
⚠️ AI personas for EDUCATIONAL and ENTERTAINMENT purposes only
⚠️ Based on publicly available information, speeches, and writings
⚠️ Always do your own research (DYOR)

The views expressed by these AI personas are generated interpretations, not actual statements from the real people.


🤝 Contributing

Want to add a legend? PRs welcome!

Each legend needs:

  • legends/<name>/skill.yaml with identity, voice, principles, patterns

  • Authentic voice based on public knowledge

  • Clear guardrails (things they'd never say)

See existing legends for examples.


📄 License

MIT - Use freely, but include the disclaimers.


Available Tools

8 tools
auto_matchA

Automatically find the most relevant legends for your question.

How it works:

  1. Analyzes your question for topics and keywords

  2. Matches relevant legends based on their expertise

  3. Returns matched legends with key insights

Use this when:

  • You're not sure which legend to ask

  • You want to see who has expertise in your topic

  • You want quick insights before a full conversation

What you get:

  • Top 2-3 most relevant legends

  • Why each was matched

  • A key insight from each

  • Suggested next steps

Examples:

  • "How do I raise money for my startup?" → Paul Graham, Marc Andreessen

  • "What's the future of AI?" → Sam Altman, Jensen Huang

  • "How should I think about risk?" → Ray Dalio, Howard Marks

DISCLAIMER: AI personas for educational purposes only.

Inputs: question (required), max_matches, include_prompts.

get_legend_contextA

Get EXTREMELY DETAILED information about a legendary founder or investor.

This tool provides:

  • Full identity - Who they are, their background, their worldview

  • Voice & style - How they communicate, characteristic phrases

  • Core principles - Their fundamental beliefs and values

  • Thinking frameworks - Step-by-step methods they use for decisions

  • Anti-patterns - What they would NEVER do

  • Example conversations - See them respond in character

  • Use cases - When to consult this legend

Formats available:

  • full - Everything (recommended for deep understanding)

  • frameworks - Just their thinking methods

  • principles - Just their beliefs

  • voice - Just their communication style

  • examples - Just sample conversations

  • system_prompt - For custom AI integrations

  • markdown - Readable overview

DISCLAIMER: AI personas for educational purposes only. Not affiliated with real individuals.

Inputs: legend_id (required), format, include_related.

get_legend_insightB

Get a quick insight or wisdom snippet from a legendary founder/investor. Returns formatted wisdom in the style of a thought leader.

Inputs: legend_id (required), topic.

list_legendsA

List all legendary founders and investors you can chat with.

The council includes:

  • Tech Titans: Elon Musk, Steve Jobs, Jeff Bezos, Jensen Huang

  • Investors: Warren Buffett, Charlie Munger, Peter Thiel, Marc Andreessen

  • Startup Sages: Paul Graham, Sam Altman, Naval Ravikant, Reid Hoffman

  • Crypto Builders: CZ, Anatoly Yakovenko, Mert Mumtaz, Michael Heinrich

Each legend has unique thinking frameworks, principles, and perspectives.

Set vibe="fun" for a more entertaining presentation.

Inputs: category, vibe.

party_modeA

Activate Party Mode - multiple legendary figures discuss your question together!

How it works:

  1. Ask a question about any topic

  2. Party mode selects relevant legends (or you can specify)

  3. Each legend responds in their authentic voice

  4. Get diverse perspectives from multiple experts

Use this when:

  • You want multiple viewpoints on a complex topic

  • You're making a big decision and want varied advice

  • You want to see how different thinkers approach a problem

  • You want an engaging group discussion format

Examples:

  • "What makes a great startup founder?" → Panel of founders discuss

  • "Is Bitcoin a good investment?" → Crypto experts + traditional investors debate

  • "How do you build company culture?" → Tech leaders share perspectives

DISCLAIMER: AI personas for educational purposes only.

Inputs: question (required), legends, category, max_legends.

search_legendsA

Search for legends by name, description, expertise, or tags.

Examples:

  • "crypto" → finds CZ, Anatoly, Mert, Michael

  • "investor" → finds Warren Buffett, Charlie Munger, Peter Thiel

  • "first principles" → finds Elon Musk

  • "AI" → finds Sam Altman, Jensen Huang

Use this for query-based discovery when you're not sure which legend to summon.

Inputs: query (required).

suggestA

🔮 PROACTIVE LEGEND SUGGESTER - Returns ready-to-execute actions!

⚡ USE THIS PROACTIVELY on questions about: business, startups, investing, crypto, AI, leadership, decisions, life advice

HOW IT WORKS:

  1. Pass user's message → suggest({ message: "..." })

  2. Get back primary_action with ready-to-use params

  3. EXECUTE the suggested action (party_mode or summon_legend)

RETURNS READY ACTIONS:

{
  "primary_action": {
    "tool": "party_mode",           // or "summon_legend"
    "params": { ... },              // Ready to pass directly!
    "description": "Get perspectives from Paul Graham, Marc Andreessen"
  },
  "suggested_actions": [ ... ],     // All options
  "instruction": "🎯 RECOMMENDED: Use party_mode..."
}

EXAMPLE FLOW:

User: "How do I raise my seed round?"

1. Call: suggest({ message: "How do I raise my seed round?" })

2. Response includes:
   primary_action.tool = "party_mode"
   primary_action.params = { question: "...", legends: ["paul-graham", "marc-andreessen", "bill-gurley"] }

3. Execute: party_mode(primary_action.params)
   → Multiple legends discuss the question!

OR for single legend:

primary_action.tool = "summon_legend"
primary_action.params = { legend_id: "paul-graham", context: "..." }

Execute: summon_legend(primary_action.params)
→ Paul Graham responds in character!

WHEN TO USE EACH TOOL:

  • party_mode: Complex questions, "pros/cons", "different perspectives", debates

  • summon_legend: Specific expertise needed, single mentor preferred

  • auto_match: Deep analysis, unsure which legend, want detailed matching

ALL 3 ARE ALWAYS SUGGESTED - pick the best fit for the user's needs!

DISCLAIMER: AI personas for educational purposes only.

Inputs: message (required).

summon_legendA

Summon a legendary founder or investor. Returns their persona context so Claude can roleplay as them.

How it works:

  1. Call this tool with a legend_id

  2. Claude receives the legend's full persona (identity, voice, principles, frameworks)

  3. Claude adopts this persona and responds in character

Use this when the user wants to:

  • Get advice from a specific legend

  • Have a conversation with a legendary figure

  • Apply a legend's thinking framework to their problem

Available legends include: Elon Musk, Warren Buffett, Steve Jobs, Jensen Huang, Charlie Munger, Paul Graham, Jeff Bezos, Sam Altman, Marc Andreessen, Naval Ravikant, Reid Hoffman, Peter Thiel, CZ, Anatoly Yakovenko, and more.

DISCLAIMER: AI personas for educational purposes only. Not affiliated with real individuals.

Inputs: legend_id (required), context.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    TDQS

    A4/5.0

    Scored across 8 tools

    Disambiguation5/5

    Each tool has a distinct purpose: auto_match finds relevant legends, get_legend_context provides detailed info, get_legend_insight gives quick wisdom, list_legends shows all, party_mode enables multi-legend discussion, search_legends queries by keywords, suggest recommends actions, and summon_legend roleplays. No overlap despite some functional relatedness.

    Naming Consistency5/5

    All tool names follow a consistent lowercase with underscore pattern (e.g., get_legend_context, list_legends) or are single words (suggest, party_mode). The naming is predictable and uses verb_noun structure where applicable.

    Tool Count5/5

    With 8 tools, the server is well-scoped for its purpose: discovering, understanding, searching, and interacting with legendary figures. Each tool earns its place without redundancy or excess.

    Completeness4/5

    The tool set covers the main lifecycle: discovery (auto_match, search_legends, list_legends), information (get_legend_context, get_legend_insight), and interaction (summon_legend, party_mode, suggest). Minor gaps like comparing legends directly are not critical.

    Maintenance

    ActivityMaintained
    ResponsivenessNo recent community issues

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