Swiss Tax API

REST API and MCP server for Swiss tax calculations. Income, corporate, inheritance, withholding, property taxes and more — all 26 cantons, 2'100+ municipalities.

Get API KeyExplore endpointsMCP Server
Request
curl -X POST https://api.taxengine.ch/api/v1/income-tax \
  -H "Content-Type: application/json" \
  -H "X-API-Key: txe_your_api_key" \
  -d '{
    "bfs_municipality": 261,
    "gross_income": 100000,
    "fortune": 50000,
    "filing_status": "single",
    "confession": "none"
  }'
Response
{
  "tax": 13759,
  "marginal_rate_pct": 32.5,
  "effective_rate_pct": 13.76,
  "breakdown": {
    "income_tax_federal": 1076,
    "income_tax_cantonal": 3843,
    "income_tax_municipal": 4611,
    "income_tax_church": 0,
    "wealth_tax_cantonal": 87,
    "wealth_tax_municipal": 105,
    "wealth_tax_church": 0,
    "personal_tax": 24
  },
  "location": { "city": "Zürich", "canton": "ZH" }
}

Authentication

Pass your API key via X-API-Key header or Authorization: Bearer <key>.

Header

X-API-Key: txe_live_...

Bearer

Authorization: Bearer txe_live_...

MCP Server

All 80+ tax tools are also available as an MCP server for Claude Desktop, Cursor, Windsurf, and other AI clients.

npx -y taxenginenpm package

Endpoints

Click any endpoint to see input parameters and response schema.

Tax Calculators

Canton-Specific

Comparison & Analysis

Lookups

Meta

All tools are also accessible via POST /api/v1/tools/:tool_name — see GET /api/v1/tools for the full list with input schemas.

Pricing

Free

CHF 0

100 requests / month

  • All endpoints
  • JSON responses
  • OpenAPI spec
  • Swagger docs
Get API key

Pro

CHF 49/ month

10'000 requests / month

  • All endpoints
  • Bulk map endpoints
  • Priority support
  • Higher rate limits
Contact us

Enterprise

Custom

Unlimited

  • All endpoints
  • Dedicated support
  • SLA guarantee
  • On-premise / self-hosted
  • Custom integrations
Contact us
100% Swiss hosted2'100+ municipalities26 cantonsREST + MCPSwagger UI docs