Koskamo

Sellat MCP

An open-source MCP server that allows AI agents to generate proof of existence for local files by hashing them locally and anchoring the SHA-256 hash on Polygon and Bitcoin. It supports creating proofs, verifying integrity, adding qualified eIDAS timestamps, and downloading evidence packages without the original file ever leaving the user's machine.

Package and access

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

Sellat MCP logo, by SellatCommunity listingLocal stdioSource reviewed; not executedPublished by Sellat
You need:create a free account at sellat.app , then a key in your dashboard ( API keys )SELLAT_API_TOKEN — your API key ( SELLAT_API_KEY is accepted too)
Vendor documentation

What you can do with it

  • Protect a file by hashing it locally and creating a blockchain proof of existence
  • Verify a file against a proof.json or evidence package to ensure integrity
  • Add a qualified eIDAS timestamp to an existing proof for legal validity
  • Check the status of a proof to see if it has been anchored on Polygon or Bitcoin

Source and maintenance

Community listingRegistry 0.3.2
mcp-registry: io.github.skanthemore/sellat-mcp@0.3.2Source repositoryProject website
Maintenance checked

Packages and installation

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

sellat-mcp 0.3.2

npmnpx
sellat-mcp package definition
{
  "version": "0.3.2",
  "transport": "stdio",
  "identifier": "sellat-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "SELLAT_API_TOKEN",
      "format": "string",
      "isRequired": true,
      "description": "Your Sellat API key (sellat_…), from sellat.app → Dashboard → API"
    },
    {
      "name": "SELLAT_DOWNLOAD_DIR",
      "format": "filepath",
      "description": "Where certificates and evidence packages are saved (default: the system's downloads folder)"
    },
    {
      "name": "SELLAT_API_URL",
      "format": "string",
      "description": "Another Sellat environment (default: https://sellat.app)"
    }
  ]
}

Tools

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

No tool definitions available.

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": {
    "sellat-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "sellat-mcp@0.3.2"
      ],
      "env": {
        "SELLAT_API_TOKEN": "<YOUR_SELLAT_API_TOKEN>",
        "SELLAT_DOWNLOAD_DIR": "<YOUR_SELLAT_DOWNLOAD_DIR>",
        "SELLAT_API_URL": "<YOUR_SELLAT_API_URL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "sellat-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "sellat-mcp@0.3.2"
      ],
      "env": {
        "SELLAT_API_TOKEN": "<YOUR_SELLAT_API_TOKEN>",
        "SELLAT_DOWNLOAD_DIR": "<YOUR_SELLAT_DOWNLOAD_DIR>",
        "SELLAT_API_URL": "<YOUR_SELLAT_API_URL>"
      }
    }
  }
}

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": {
    "sellat-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "sellat-mcp@0.3.2"
      ],
      "env": {
        "SELLAT_API_TOKEN": "<YOUR_SELLAT_API_TOKEN>",
        "SELLAT_DOWNLOAD_DIR": "<YOUR_SELLAT_DOWNLOAD_DIR>",
        "SELLAT_API_URL": "<YOUR_SELLAT_API_URL>"
      }
    }
  }
}

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": {
    "sellat-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "sellat-mcp@0.3.2"
      ],
      "env": {
        "SELLAT_API_TOKEN": "<YOUR_SELLAT_API_TOKEN>",
        "SELLAT_DOWNLOAD_DIR": "<YOUR_SELLAT_DOWNLOAD_DIR>",
        "SELLAT_API_URL": "<YOUR_SELLAT_API_URL>"
      }
    }
  }
}

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