Penumbra MCP Server

An MCP server providing tools for interacting with the Penumbra blockchain. This server enables privacy-preserving interactions with Penumbra's core features including transaction queries, validator set information, DEX state, and governance proposals.

Features

Current Tools

get_validator_set: Get the current validator set information
get_chain_status: Get current chain status including block height and chain ID
get_transaction: Get details of a specific transaction
get_dex_state: Get current DEX state including latest batch auction results
get_governance_proposals: Get active governance proposals

Planned Features

Transaction submission
Private staking operations
DEX trading (sealed-bid batch auctions)
Private governance voting
Liquidity position management

Installation

You can install the package via npm:

npm install @timeheater/penumbra-mcp

Or using yarn:

yarn add @timeheater/penumbra-mcp

Setup

Local Development from Source

Install dependencies:

npm install

Build the server:

npm run build

Run in development mode:

npm run watch

Claude Desktop Integration

To integrate with Claude desktop, add the following configuration to your Claude desktop settings file (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "penumbra-mcp": {
      "command": "node",
      "args": ["/Users/barton/infinity-topos/penumbra-mcp/build/index.js"],
      "env": {
        "PENUMBRA_NODE_URL": "https://rpc.penumbra.zone",
        "PENUMBRA_NETWORK": "mainnet",
        "PENUMBRA_CHAIN_ID": "penumbra-1",
        "PENUMBRA_REQUEST_TIMEOUT": "30000",
        "PENUMBRA_REQUEST_RETRIES": "5",
        "PENUMBRA_BLOCK_TIME": "6000",
        "PENUMBRA_EPOCH_DURATION": "100",
        "PENUMBRA_DEX_BATCH_INTERVAL": "60000",
        "PENUMBRA_DEX_MIN_LIQUIDITY": "1000",
        "PENUMBRA_DEX_MAX_PRICE_IMPACT": "0.05",
        "PENUMBRA_GOVERNANCE_VOTING_PERIOD": "1209600000",
        "PENUMBRA_GOVERNANCE_MIN_DEPOSIT": "100000"
      }
    }
  }
}

Replace /path/to/penumbra-mcp with the actual path where you've installed the server.

Using the MCP Server

Once configured, you can interact with Penumbra through Claude using the following tools:

Query validator set:

Tell Claude: "Show me the current Penumbra validator set"

Check chain status:

Tell Claude: "What's the current status of the Penumbra chain?"

Get transaction details:

Tell Claude: "Look up Penumbra transaction [HASH]"

View DEX state:

Tell Claude: "Show me the current Penumbra DEX state"

List governance proposals:

Tell Claude: "List active Penumbra governance proposals"

Development

npm run watch: Watch mode for development
npm run inspector: Run MCP inspector for testing
npm test: Run test suite

Environment Variables

Node Configuration

PENUMBRA_NODE_URL: URL of the Penumbra node (default: https://rpc.penumbra.zone)
PENUMBRA_REQUEST_TIMEOUT: HTTP request timeout in milliseconds (default: 30000)
PENUMBRA_REQUEST_RETRIES: Number of request retries (default: 5)

Chain Configuration

PENUMBRA_NETWORK: Network to connect to (default: mainnet)
PENUMBRA_CHAIN_ID: Chain ID (default: penumbra-1)
PENUMBRA_BLOCK_TIME: Block time in milliseconds (default: 6000)
PENUMBRA_EPOCH_DURATION: Number of blocks per epoch (default: 100)

DEX Configuration

PENUMBRA_DEX_BATCH_INTERVAL: Batch auction interval in milliseconds (default: 60000)
PENUMBRA_DEX_MIN_LIQUIDITY: Minimum liquidity amount (default: 1000)
PENUMBRA_DEX_MAX_PRICE_IMPACT: Maximum price impact as decimal (default: 0.05)

Governance Configuration

PENUMBRA_GOVERNANCE_VOTING_PERIOD: Voting period duration in milliseconds (default: 1209600000 - 14 days)
PENUMBRA_GOVERNANCE_MIN_DEPOSIT: Minimum proposal deposit amount (default: 100000)

Architecture

The server is built using TypeScript and implements the Model Context Protocol (MCP) for standardized tool interfaces. It currently provides mock implementations for core functionality, with plans to integrate directly with Penumbra's client libraries and node API endpoints.

Privacy Considerations

All interactions respect Penumbra's privacy-preserving design:

Shielded transactions
Private staking operations
Sealed-bid batch auctions
Anonymous governance voting

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

ISC