How to Use the First Principles Prover MCP in Claude

Q: Can I use First Principles Prover on both Claude Desktop and the web?

Yes. You can configure it locally via your claudedesktopconfig.json file for local stdio execution, or plug the Vinkius HTTPS URL directly into the custom connectors settings on Claude.ai.

Q: What happens when a reasoning check fails in Claude Desktop?

The validatefirstprinciples tool returns a failure status along with the specific logical gaps and blocklisted jargon detected. This feedback forces the desktop agent to rewrite its proposal from scratch using fundamental truths.

Force Claude Desktop to strip away lazy analogies and build your technical solutions from raw physical and logical axioms.

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Connect First Principles Prover MCP to Claude Desktop

Create your Vinkius account to connect First Principles Prover to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup First Principles Prover with Claude Desktop

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Perplexity

Run code architectures through the 6-pivot trap

The `validate_first_principles` tool intercepts lazy thinking by forcing your Claude Desktop agent to evaluate technical claims against raw physical and mathematical truths. Instead of letting the model copy-paste standard industry patterns, this tool blocks the prompt until the model strips away all business jargon. You'll see immediate changes in how the model designs systems. It stops recommending heavy frameworks just because everyone else uses them, focusing instead on compute constraints and basic logic.

Kill buzzword-driven design in Claude Desktop

By calling the `validate_first_principles` tool, your desktop agent runs a strict semantic check on every proposed architecture. This MCP Server rejects bloated industry buzzwords, forcing the model to define its terms using fundamental physical limits. This means you get architectures based on actual network latency and memory access times, not marketing promises. Your local agent stops acting like a junior consultant and starts acting like a systems engineer.

Axiomatic verification directly on your machine

The `validate_first_principles` tool runs locally via stdio to verify that every proposition in your chat resolves to established mathematical or logical axioms. This MCP Server acts as a strict gatekeeper, flagging unproven assumptions before they end up in your codebase. Because Claude Desktop executes this as a local subprocess, you get zero-latency verification of your design docs. No external APIs are called during this validation step, keeping your logical audits fast and private.

Setup guide

Set up First Principles Prover MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The First Principles Prover MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the First Principles Prover MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under first-principles-prover-mcp.

json

{
  "mcpServers": {
    "first-principles-prover-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by First Principles Prover. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about First Principles Prover MCP in Claude Desktop

It forces the agent through a 6-pivot cognitive trap. When Claude Desktop calls the `validate_first_principles` tool on this MCP Server, it cannot proceed until it strips away industry jargon and validates the core logic against physical or mathematical axioms.

Yes. You can configure it locally via your `claude_desktop_config.json` file for local stdio execution, or plug the Vinkius HTTPS URL directly into the custom connectors settings on Claude.ai.

The `validate_first_principles` tool returns a failure status along with the specific logical gaps and blocklisted jargon detected. This feedback forces the desktop agent to rewrite its proposal from scratch using fundamental truths.

No. The MCP Server handles the constraints programmatically through its tool schema. Once connected, your agent naturally queries the tool to validate its reasoning steps without manual prompt engineering.

Your raw logical premises and text analyses are processed inside Vinkius's secure, ephemeral V8 Isolate Sandbox. No data is stored or used for training, ensuring your proprietary system designs remain completely confidential.

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