How do I install Warrant?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 50 (Fair). The formula is published on the methodology page.

MCPpedia

Warrant MCP Server — Install for Claude, Cursor & VS Code | MCPpedia

Warrant MCP Server

Name: Warrant MCP Server
Author: s0fractal

Record an agent's decisions with reasons anyone can re-execute offline — verify recomputes them.

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Registrys0fractal

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Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "s0fractal-mcp-server": {
      "command": "uvx",
      "args": [
        "warrant-verify"
      ],
      "env": {
        "WARRANT_STORE": "",
        "WARRANT_KEY": "YOUR_WARRANT_KEY",
        "WARRANT_ACTOR": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
WARRANT_STORE	No	Absolute path to the warrant store this server files into and verifies. Defaults to .warrants relative to the server process's working directory, which an MCP host does not guarantee.
WARRANT_KEY	No	Ed25519 signing key. If unset, one is generated next to the store on the first filing and the result says so; any process that can read it can sign as this actor. Secret.
WARRANT_ACTOR	No	Actor id written into filed warrants. Defaults to mcp-client@<hostname>.

Warrant MCP Server

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