PostAgent vs X402 Ethereum RPC

In-depth architectural comparison of the PostAgent and X402 Ethereum RPC 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?

P

Choose PostAgent 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 PostAgent Details

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

Feature & Specification Comparison

Specification	P PostAgent Finance & Fintech	X402 Ethereum RPC Finance & Fintech
Summary	Print & mail PDF/HTML/Markdown/text/DOCX/images to US addresses; pay per call in x402 USDC on Base.	Ethereum mainnet JSON-RPC paid per call in USDC on Base. No account, no API key: the wallet pays.
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": {
    "postagent": {
      "command": "npx",
      "args": [
        "-y",
        "skills"
      ]
    }
  }
}

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

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