@clawswap/mcp-server

Send, swap, and bridge tokens cross-chain between Solana and Base — gasless, in one tool call. Built for AI agents using the Model Context Protocol (MCP).

What can it do?

Ask your AI agent any of these:

• "Send 10 USDC from Solana to Base"
• "How much would it cost to bridge 100 USDC to Base?"
• "Transfer my SOL to Base as ETH"
• "Swap 50 USDT from Base to Solana"
• "Move my stablecoins cross-chain"

The server handles the entire flow: quote → payment → signing → submission → settlement.

Quick Start

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "clawswap": {
      "command": "npx",
      "args": ["-y", "@clawswap/mcp-server"],
      "env": {
        "SOLANA_PRIVATE_KEY": "your-base58-solana-private-key",
        "BASE_PRIVATE_KEY": "0x-your-hex-base-private-key"
      }
    }
  }
}

Claude Code

claude mcp add clawswap -- npx -y @clawswap/mcp-server

Then set environment variables for the MCP server:

export SOLANA_PRIVATE_KEY="your-base58-solana-private-key"
export BASE_PRIVATE_KEY="0x-your-hex-base-private-key"

Tools

clawswap_bridge

Bridge tokens between Solana and Base. Handles the entire flow automatically.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | amount | string | yes | Human-readable amount, e.g. "100", "0.5" | | token | string | yes | Token symbol: USDC, USDT, SOL, ETH, WETH | | from | "solana" | "base" | yes | Source chain | | to | "solana" | "base" | yes | Destination chain | | recipient | string | no | Destination address (defaults to agent's own) | | destinationToken | string | no | Destination token (defaults to same or USDC) | | slippage | number | no | Slippage tolerance 0-1 (default 0.01) |

clawswap_quote

Preview a bridge quote without executing. Free, no payment required.

Same parameters as clawswap_bridge minus recipient.

clawswap_status

Check the status of a previously initiated bridge.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | requestId | string | yes | The requestId from clawswap_bridge |

Environment Variables

| Variable | Required | Description | |----------|----------|-------------| | SOLANA_PRIVATE_KEY | For Solana→Base | Base58-encoded Solana private key | | BASE_PRIVATE_KEY | For Base→Solana | 0x-prefixed hex Base/EVM private key | | SOLANA_RPC_URL | No | Solana RPC (default: https://api.mainnet-beta.solana.com) | | BASE_RPC_URL | No | Base RPC (default: https://mainnet.base.org) |

You only need keys for the direction(s) you want to bridge. The server starts with whatever is configured.

Fees

• Solana → Base: $0.50 USDC (paid automatically via x402 protocol, gas sponsored by ClawSwap)
• Base → Solana: Free (agent pays ~$0.001 Base gas directly)

Supported Tokens

• Solana: USDC, USDT, SOL
• Base: USDC, USDT, ETH, WETH

License

MIT