blockapps/griphook

Mercata MCP Server

MCP Server for the Mercata blockchain API, enabling Claude to interact with the Mercata marketplace, manage assets, stakes, and reserves.

Tools

get-reserve-details-of-assets

Get the current TVL (Total Value Locked), price, and reserve & escrow details of assets.

• Optional inputs:
  • assetNames (array of strings): List of asset names to get TVL, price, and reserve & escrow details for
• Returns: Detailed information about reserves including TVL, price, and escrow positions

get-mercata-user-details

Get detailed profile information for a specific user.

• Optional inputs:
  • user (string): The username to look up (if omitted, uses the currently authenticated user)
• Returns: User's assets and reserves with detailed information

purchase-asset-for-user

Purchase an asset for the user on the Mercata blockchain.

• Required inputs:
  • asset (string): Asset name to purchase
  • quantity (number): Quantity to purchase
• Returns: Purchase confirmation and transaction details

borrow-usdst-for-user

Borrow USDST for the user from a reserve on the Mercata blockchain.

• Required inputs:
  • reserveAddress (string): The reserve address to borrow from
  • escrowAddress (string): The escrow address representing the user position on the reserve
  • quantity (number): Amount to borrow
• Returns: Borrow confirmation and transaction details

stake-asset-for-user

Stake an asset of the user on a reserve on the Mercata blockchain.

• Required inputs:
  • assetName (string): The asset name to stake
  • quantity (number): Quantity to stake
• Returns: Staking confirmation and transaction details

Weather Tools

The server also includes weather tools for retrieving weather alerts and forecasts:

get-alerts

Get weather alerts for a specific state in the US.

• Required inputs:
  • state (string): Two-letter state code (e.g., CA, NY)
• Returns: List of active weather alerts for the specified state

get-forecast

Get weather forecast for a specific location.

• Required inputs:
  • latitude (number): Latitude of the location
  • longitude (number): Longitude of the location
• Returns: Detailed weather forecast for the specified location

Installation

Prerequisites

Node.js version 18.0.0 or higher is required

Clone the repository:

git clone https://github.com/blockapps/ba-mcp.git
cd ba-mcp

Install dependencies and build the project:

npm install
npm run build

Usage with Claude Desktop

Locating the Configuration File

The Claude Desktop configuration file is typically located at:

• macOS: ~/Library/Application Support/Claude Desktop/claude_desktop_config.json
• Windows: %APPDATA%\Claude Desktop\claude_desktop_config.json
• Linux: ~/.config/Claude Desktop/claude_desktop_config.json

If the file doesn't exist yet, you'll need to create it.

Configuring the MCP Server

Add the following to your claude_desktop_config.json file:

{
  "mcpServers": {
    "mercata": {
      "command": "/path/to/your/node",
      "args": ["/path/to/ba-mcp/build/index.js"],
      "env": {
        "BA_USERNAME": "your-mercata-username",
        "BA_PASSWORD": "your-mercata-password"
      }
    }
  }
}

For example:

{
  "mcpServers": {
    "mercata": {
      "command": "/Users/username/.nvm/versions/node/v21.7.1/bin/node",
      "args": ["/Users/username/Documents/projects/ba-mcp/build/index.js"],
      "env": {
        "BA_USERNAME": "youremail@example.com",
        "BA_PASSWORD": "yourpassword"
      }
    }
  }
}

Environment Variables

Required environment variables:

• BA_USERNAME: Your Mercata platform username
• BA_PASSWORD: Your Mercata platform password

Optional environment variables:

• CLIENT_ID: Your OAuth client ID
• CLIENT_SECRET: Your OAuth client secret
• OPENID_DISCOVERY_URL: URL for OpenID discovery
• MARKETPLACE_URL: URL for the Mercata marketplace

Troubleshooting

If you encounter permission errors, verify that:

• You have provided the correct credentials in your environment variables
• The user has sufficient permissions for the operations you're attempting
• The authentication token is being properly retrieved and used

Development

To set up a development environment:

1. Clone the repository: git clone https://github.com/blockapps/ba-mcp.git
2. Install dependencies: npm install
3. Build the project: npm run build
4. Run the server with proper credentials

License

This MCP server is licensed under the ISC License. See the LICENSE file for details.