X402 Ethereum RPC vs Swap API

In-depth architectural comparison of the X402 Ethereum RPC and Swap API MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

Choose X402 Ethereum RPC when:

• You need dedicated capabilities in the Finance & Fintech domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore X402 Ethereum RPC Details

Choose Swap API when:

• You need dedicated capabilities in the Finance & Fintech domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: EVM token-swap calldata generation, Quote and price-impact details, Configurable maximum slippage.

Explore Swap API Details

Feature & Specification Comparison

Specification	X402 Ethereum RPC Finance & Fintech	Swap API Finance & Fintech
Summary	Ethereum mainnet JSON-RPC paid per call in USDC on Base. No account, no API key: the wallet pays.	MCP server for SwapAPI - get executable token swap calldata for EVM chains
Category & Scope	Finance & Fintech	Finance & Fintech

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "x402-ethereum-rpc": {
      "command": "npx",
      "args": [
        "-y",
        "wrangler"
      ]
    }
  }
}

{
  "mcpServers": {
    "mcp-207": {
      "command": "npx",
      "args": [
        "-y",
        "@swapapi/mcp"
      ]
    }
  }
}

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