How to Use the First Principles Prover MCP in Claude Code

Q: How do I add First Principles Prover to Claude Code?

Use the claude mcp add command with the server endpoint. Claude Code will then recognize the validatefirstprinciples tool as a local command.

Use the First Principles Prover with Claude Code to force axiomatic rigor in your headless pipelines.

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Connect First Principles Prover MCP to Claude Code

Create your Vinkius account to connect First Principles Prover to Claude Code 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 Code

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Claude

Perplexity

Axiomatic pipeline verification

Claude Code operates in the terminal, where bad assumptions can break a build. This tool forces the agent to validate its reasoning via the `validate_first_principles` tool before executing commands. By stripping out analogical reasoning, you ensure your CI/CD scripts are built on solid logic. It prevents the agent from adopting common, but flawed, industry hacks.

Jargon-free reasoning for Claude Code

Standard agents love buzzwords that sound correct but mean nothing. This tool purges that noise. Claude Code uses this to ensure that every step in its execution is grounded in hard, verifiable data. It is the best way to keep your headless workflows predictable.

Constraint-based execution

The 6-pivot trap forces the agent to deconstruct problems into fundamental truths. You can pipe this logic directly into your automation. If the agent can't prove its logic is axiomatic, it stops. This prevents your pipelines from executing code based on shaky, non-logical assumptions.

Setup guide

Set up First Principles Prover MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see first-principles-prover-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest First Principles Prover transactions." It will automatically discover and invoke the available First Principles Prover tools.

Terminal

claude mcp add --transport http first-principles-prover-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the First Principles Prover MCP

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

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "first-principles-prover-mcp": {
      "type": "url",
      "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 Code

Use the `claude mcp add` command with the server endpoint. Claude Code will then recognize the `validate_first_principles` tool as a local command.

It is built for that. You can force Claude Code to run a validation check on every PR to ensure the proposed changes are logically sound.

Absolutely. It forces the agent to isolate the root cause of a bug using first principles rather than guessing based on similar error logs.

The server is strictly for logical validation. It does not touch your env files or secrets, and it operates within a zero-trust sandbox.

Vinkius hosts the server in an ephemeral sandbox. Your reasoning data is never logged or shared, providing a clean boundary between your terminal and the validation logic.

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