Koskamo

Warrant MCP

The Warrant MCP server allows AI agents to interact with signed, hash-addressed decision records. It enables verification of agent decisions by recomputing them offline, checking reliance states, and auditing provenance through a stdio interface.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Warrant MCP logo, by s0fractalCommunity listingLocal stdioSource reviewed; not executedPublished by s0fractal
Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

  • Popularity 5 GitHub stars

What you can do with it

  • Verify agent decisions by recomputing them offline
  • Check reliance states of decision records
  • Audit provenance of AI agent actions

Source and maintenance

Community listingRegistry 0.9.0MIT
mcp-registry: io.github.s0fractal/warrant@0.9.0Source repositoryProject website
Last repository push
Latest release
v0.12.0
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

warrant-verify 0.9.0

pypi
warrant-verify package definition
{
  "version": "0.9.0",
  "transport": "stdio",
  "identifier": "warrant-verify",
  "registryType": "pypi",
  "registryBaseUrl": "https://pypi.org",
  "environmentVariables": [
    {
      "name": "WARRANT_STORE",
      "description": "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."
    },
    {
      "name": "WARRANT_KEY",
      "description": "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."
    },
    {
      "name": "WARRANT_ACTOR",
      "description": "Actor id written into filed warrants. Defaults to mcp-client@<hostname>."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "warrant-mcp": {
      "command": "uvx",
      "args": [
        "warrant-verify==0.9.0"
      ],
      "env": {
        "WARRANT_STORE": "<YOUR_WARRANT_STORE>",
        "WARRANT_KEY": "<YOUR_WARRANT_KEY>",
        "WARRANT_ACTOR": "<YOUR_WARRANT_ACTOR>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "warrant-mcp": {
      "command": "uvx",
      "args": [
        "warrant-verify==0.9.0"
      ],
      "env": {
        "WARRANT_STORE": "<YOUR_WARRANT_STORE>",
        "WARRANT_KEY": "<YOUR_WARRANT_KEY>",
        "WARRANT_ACTOR": "<YOUR_WARRANT_ACTOR>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "warrant-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "warrant-verify==0.9.0"
      ],
      "env": {
        "WARRANT_STORE": "<YOUR_WARRANT_STORE>",
        "WARRANT_KEY": "<YOUR_WARRANT_KEY>",
        "WARRANT_ACTOR": "<YOUR_WARRANT_ACTOR>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "warrant-mcp": {
      "command": "uvx",
      "args": [
        "warrant-verify==0.9.0"
      ],
      "env": {
        "WARRANT_STORE": "<YOUR_WARRANT_STORE>",
        "WARRANT_KEY": "<YOUR_WARRANT_KEY>",
        "WARRANT_ACTOR": "<YOUR_WARRANT_ACTOR>"
      }
    }
  }
}

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