Clawswap

npm version License: MIT npm downloads

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.

Installation

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:

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

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

{
  "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"
      }
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_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"
      }
    }
  }
}

OpenAI Codex

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

Or add to ~/.codex/config.toml:

[mcp_servers.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" }

Antigravity

Add to ~/.gemini/antigravity/mcp_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"
      }
    }
  }
}

Smithery

npx -y @smithery/cli install @clawswap/mcp-server --client claude

Supports multiple clients: claude, cursor, windsurf, cline, vscode, and more.

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