💸 B2B SaaS Pricing Model, PLG & Enterprise "SSO-Tax" Auditor — MCP Server

A standalone, self-contained Model Context Protocol (MCP) Server written in Python (mcp_server.py) that enables AI assistants (Claude Desktop, Cursor, Windsurf, Cline, and custom MCP clients) to inspect any B2B SaaS domain's pricing pages and extract its Go-To-Market (GTM) sales motion, pricing model, starting USD price point, free tier / trial availability, billing infrastructure stack, and whether SAML / SSO is gated behind an Enterprise plan ("SSO Tax") directly over local stdio.

Zero third-party API keys or external cloud subscriptions are required. All HTTP probing (httpx) and HTML/DOM pricing extraction (BeautifulSoup4) run locally inside the MCP server process.

🔧 MCP Tools Provided

This MCP server exposes two tools over JSON-RPC 2.0 stdio:

1. audit_saas_pricing

Audits a single B2B SaaS domain's pricing page (/pricing, /plans) to extract its sales motion, pricing model, lowest paid tier, Free Tier/Trial flags, Enterprise SSO/SAML gating, and billing stack.

• Input Schema:

  • domain (string, required): Target SaaS domain (e.g., "linear.app", "supabase.com", "figma.com").

2. batch_audit_saas_pricing

Concurrently audits up to 15 B2B SaaS domains in parallel.

• Input Schema:

  • domains (array[string], required): List of SaaS domains to inspect concurrently.

Related MCP server: TokenEnrich MCP Server

📦 Installation & Local MCP Configuration

Prerequisites

• Python 3.11+ (or Docker)

• Dependencies: httpx, beautifulsoup4, pydantic

git clone https://github.com/tobiaslofton/saas-pricing-sso-tax-auditor.git
cd saas-pricing-sso-tax-auditor
pip install -r requirements.txt

Option 1: Claude Desktop / Cursor / Windsurf (python or uv over stdio)

Add the following entry to your claude_desktop_config.json or .cursor/mcp.json:

{
  "mcpServers": {
    "saas-pricing-sso-tax-auditor": {
      "command": "python",
      "args": [
        "/absolute/path/to/saas-pricing-sso-tax-auditor/mcp_server.py"
      ]
    }
  }
}

Or using uv:

{
  "mcpServers": {
    "saas-pricing-sso-tax-auditor": {
      "command": "uv",
      "args": [
        "--directory",
        "/absolute/path/to/saas-pricing-sso-tax-auditor",
        "run",
        "python",
        "mcp_server.py"
      ]
    }
  }
}

Option 2: Run via Docker (stdio)

Build the local image and connect via docker run -i:

docker build -t saas-pricing-sso-tax-auditor .

{
  "mcpServers": {
    "saas-pricing-sso-tax-auditor": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "saas-pricing-sso-tax-auditor"
      ]
    }
  }
}

🚀 Extracted Signals & Schema

📊 Example Tool Output (audit_saas_pricing)

{
  "domain": "supabase.com",
  "pricing_page_url": "https://supabase.com/pricing",
  "sales_motion": "Hybrid (PLG Self-Serve + Enterprise Sales)",
  "pricing_model": "Hybrid (Per-Seat + Usage-Based)",
  "has_free_tier": true,
  "has_free_trial": false,
  "has_enterprise_tier": true,
  "lowest_paid_price_usd": 2.0,
  "price_points_detected": ["$0", "$2", "$3", "$5", "$10", "$25", "$60", "$75"],
  "sso_saml_mentioned": true,
  "sso_tax_gated": true,
  "billing_stack": [],
  "gtm_summary": "supabase.com runs a Hybrid (PLG Self-Serve + Enterprise Sales) motion with Hybrid (Per-Seat + Usage-Based) pricing (Lowest paid tier: $2/mo, Free tier: Yes, Enterprise SSO-Tax gated: Yes)."
}

📄 License

MIT License — see LICENSE.