Across Protocol MCP

What it does

This MCP app indexes the Across Protocol documentation and integrates directly with the Across REST API. It allows developers to search documentation, query live bridge fees, and even perform cross-chain swaps via an interactive UI.

Key features

• Interactive Swap UI: Renders a sandboxed swap view using WalletConnect for secure, user-signed transactions.
• Live API Integration: Real-time fee quotes, supported chain lists, and deposit tracking.
• Documentation Search: TF-IDF search across indexed Across docs for instant answers.
• Cross-Chain Tooling: Generate ready-to-sign calldata for swaps and diagnose deposits.

Installation

Hosted (HTTP): Add to claude_desktop_config.json:

{
  "mcpServers": {
    "across-docs": {
      "url": "https://mcp.across.to/mcp"
    }
  }
}

Self-Hosted (stdio):

{
  "mcpServers": {
    "across-docs": {
      "command": "npx",
      "args": ["-y", "mcp-server-across"]
    }
  }
}

Supported hosts

• Claude Desktop
• Claude Code
• Cursor
• Codex
• Windsurf
• VS Code Copilot