CalcFlow API v1.0 (Beta)

Integrate real-time exchange rates, freelance fee structures, and global VAT data directly into your own SaaS, agency dashboard, or internal tools.

Free for open-source projects.

GET

/v1/rates/live

Fetches the current mid-market exchange rates and platform fee modifiers.

curl https://api.calcflow.org/v1/rates/live \
  -H "Authorization: Bearer YOUR_API_KEY"

200 OK

{
  "base": "USD",
  "timestamp": 1715423892,
  "rates": {
    "EUR": 0.9245,
    "GBP": 0.7920,
    "TRY": 34.2580
  },
  "fees": {
    "wise": 0.0055,
    "stripe": 0.0290
  }
}

POST

/v1/tax/validate

Validates a VAT ID and returns the applicable reverse-charge status.

{
  "valid": true,
  "country_code": "DE",
  "vat_rate": 19,
  "reverse_charge_eligible": true
}