@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.

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

MCP Servers