Substrate Browser vs X402 Extract

In-depth architectural comparison of the Substrate Browser and X402 Extract 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 Substrate Browser 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 Substrate Browser Details

Choose X402 Extract 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 Extract Details

Feature & Specification Comparison

Specification	Substrate Browser Finance & Fintech	X402 Extract Finance & Fintech
Summary
Category & Scope	Finance & Fintech	Finance & Fintech
Quality signal

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": {
    "substrate-browser": {
      "command": "npx",
      "args": [
        "-y",
        "substrate-browser"
      ]
    }
  }
}

{
  "mcpServers": {
    "x402-extract": {
      "command": "npx",
      "args": [
        "-y",
        "x402-extract-mcp"
      ]
    }
  }
}

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