Fortnox vs GPT55 Model Gateway

In-depth architectural comparison of the Fortnox and GPT55 Model Gateway 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 Fortnox 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 Fortnox Details

G

Choose GPT55 Model Gateway 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 GPT55 Model Gateway Details

Feature & Specification Comparison

Specification	Fortnox Finance & Fintech	G GPT55 Model Gateway Finance & Fintech
Summary	MCP server for Fortnox Swedish accounting API integration	Remote MCP gateway for GPT-5.6 Luna, Soul, Terra, and x402-paid agent tools with no API key.
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": {
    "fortnox": {
      "command": "npx",
      "args": [
        "-y",
        "fortnox-mcp-server"
      ]
    }
  }
}

{
  "mcpServers": {
    "gpt55-model-gateway": {
      "command": "npx",
      "args": [
        "-y",
        "gpt55-model-gateway"
      ]
    }
  }
}

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