{
  "openapi": "3.1.0",
  "info": {
    "title": "B2B Fee Audit — Payroll, Multi-State HRIS & Merchant Fee TCO API",
    "version": "2026.10.24",
    "description": "Stateless deterministic TCO calculation and benchmark lookup endpoints for ChatGPT Plugins, Meta Muse Connectors, Perplexity, Claude, and Grok agents. Returns 12-month all-in vendor costs, .gov SUI payroll tax loads, Visa/Mastercard interchange-plus savings, and tracked partner switch links.",
    "contact": {
      "name": "Research Triangle Park AI Transformation LLC",
      "email": "luke@rtpait.com",
      "url": "https://b2bfeeaudit.com/"
    },
    "license": {
      "name": "CC-BY-4.0",
      "url": "https://creativecommons.org/licenses/by/4.0/"
    }
  },
  "servers": [
    {
      "url": "https://b2bfeeaudit.com",
      "description": "Production Static JSON Benchmark & Calculator Manifest Host"
    }
  ],
  "paths": {
    "/datasets/b2b-payroll-and-merchant-fee-benchmarks-2026.json": {
      "get": {
        "operationId": "getB2BFeeBenchmarks2026",
        "summary": "Retrieve complete 2026 B2B Payroll/HRIS vendor fee schedules, 50-state .gov SUI tax benchmarks, and Visa/Mastercard Interchange-Plus rate tables.",
        "responses": {
          "200": {
            "description": "Complete 2026 B2B Payroll & Merchant Fee JSON benchmark dataset with deterministic formulas and partner switch URLs."
          }
        }
      }
    },
    "/.well-known/webmcp.json": {
      "get": {
        "operationId": "getWebMcpManifest",
        "summary": "Retrieve the WebMCP 1.0 tool manifest and deterministic parameter schemas for the 4 B2B TCO calculators.",
        "responses": {
          "200": {
            "description": "WebMCP 1.0 JSON manifest."
          }
        }
      }
    }
  }
}