{
 "name": "Marginrule pricing agent (MCP server)",
 "version": "0.1.0",
 "description": "Free, read-only MCP server for fee-accurate pricing: the lowest price that keeps a target margin after platform and card fees, and fee breakdowns at a price, for Etsy, Shopify, Payhip, Gumroad, Ko-fi, Notion Marketplace and Square (US sellers).",
 "mcp_endpoint": "https://mcp.marginrule.com/mcp",
 "transport": "streamable-http (POST JSON-RPC, JSON responses, stateless)",
 "tools": [
  "price_for_margin",
  "fees_breakdown",
  "list_platforms",
  "data_version"
 ],
 "data_version": "2026-11-14",
 "fees_as_of": "2026-11-14",
 "units": "Rates and margins are fractions (0.30 = 30%). Money is USD.",
 "links": {
  "fee_data": "https://marginrule.com/fees.json"
 },
 "attribution": {
  "text": "Data: marginrule.com fee dataset",
  "url": "https://marginrule.com/fees.json"
 },
 "verify": "Verify on the platform's page before relying on it. Platforms change fees without notice; every rate here carries the date it was read and its source URL.",
 "privacy": "Stateless. No sign-in. The code never logs or stores request bodies."
}