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Domicyle Developer API

Programmatic access to global tax calculations, take-home pay comparisons, and residency risk data — for B2B integrations, HR platforms, and nomad tools. Building an AI agent instead? See the MCP server.

Subscribe — $99/mo →View consumer pricing

Endpoints

What you can build

POSThttps://api.keepmore.money/v1/tax/calculateAPI key required—Gross-to-net tax breakdown for any country and income

GEThttps://api.keepmore.money/v1/tax/compareAPI key required—Side-by-side take-home comparison across multiple countries

GEThttps://api.keepmore.money/v1/tax/countriesNo key required—List all supported countries and available years

POSThttps://api.keepmore.money/v1/public/residency/riskNo key required—Compute residency risk score from explicit trip parameters

POSThttps://api.keepmore.money/v1/public/residency/schengenNo key required—Schengen 90/180-day rolling window compliance

POSThttps://api.keepmore.money/v1/public/residency/feieNo key required—US FEIE 330-day physical-presence countdown

GEThttps://api.keepmore.money/v1/public/residency/rulesNo key required—Day thresholds and rule groups for every supported country

The stateless residency calculators (Schengen, FEIE, risk) need no API key — rate limited by IP, suitable for GPT Actions and browser-based tools. Tax calculation endpoints require a developer API key.

Simple Integration

One request. Full breakdown.

example.js

// Compare take-home pay across countries
const params = new URLSearchParams({
  salary: "120000",
  countries: "us,ae,pt,sg",
  year: "2026",
});
const response = await fetch(
  `https://api.keepmore.money/v1/tax/compare?${params}`,
  {
    method: "GET",
    headers: {
      Authorization: "Bearer YOUR_API_KEY",
    },
  }
);

const data = await response.json();
// → { results: [{ countryCode: "ae", netIncome: 120000, effectiveRate: 0 }, ...] }

example.sh

curl -s -X POST "https://api.keepmore.money/v1/tax/calculate" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"countryCode": "pt", "salary": 120000, "year": 2026}'

Built for Developers

Everything you need

⚡

Fast & reliable

Sub-100ms responses backed by the same engine powering domicyle.com

🌍

57 countries

Full tax breakdowns with brackets, deductions, and social contributions

🔑

Simple auth

Single API key in the Authorization header — no OAuth complexity

📦

JSON everywhere

Consistent request/response shapes with clear error codes

🧠

Special regimes

Portugal NHR, Greece HNWI, and more via a single regime parameter

📈

Versioned

Stable v1 contracts with deprecation notices before breaking changes

Need a key for the authenticated endpoints?

$99/mo — 10,000 calls included, same key works for REST and MCP. Building an AI agent instead? See the MCP server.

Subscribe — $99/mo →Have questions first?

We’ll email your API key within one business day of payment.