@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:

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

Terminal

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

Then set environment variables:

server.ts

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):

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"
      }
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

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

bash

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

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

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:

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

Terminal

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