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// Free · Open · No key required

Reise Tools API

Free calculator infrastructure. POST any inputs, get structured results back. 38 calculators available today — every tool in the hub.

●https://mitchreise.com/api/...
GET/api/tools

Returns the full tool registry as JSON. Each tool includes its slug, name, category, tags, status, and whether it has a calculator API endpoint.

Example request
curl https://mitchreise.com/api/tools
Response shape
{
  "count": 48,
  "calculatorApiCount": 38,
  "tools": [
    {
      "id": "tip",
      "name": "Tip Calculator",
      "category": "lifestyle",
      "tags": ["tip", "bill split", "dining"],
      "status": "live",
      "hasCalculatorApi": true,
      "calculatorDescription": "Tip amount and per-person split"
    },
    ...
  ]
}
POST/api/calculate/[slug]

Run any calculator server-side and get structured results. Pass your inputs as the request body (either { inputs: {...} } or the inputs object directly).

Example — tip calculator
curl -X POST https://mitchreise.com/api/calculate/tip \
  -H "Content-Type: application/json" \
  -d '{"inputs": {"billTotal": 85.50, "tipPct": 20, "people": 3, "roundUp": false}}'
Response
{
  "slug": "tip",
  "toolName": "Tip Calculator",
  "description": "Tip amount and per-person split",
  "result": {
    "tipAmount": 17.10,
    "total": 102.60,
    "perPerson": 34.20,
    "tipPct": 20
  }
}
Example — mortgage calculator
curl -X POST https://mitchreise.com/api/calculate/mortgage \
  -H "Content-Type: application/json" \
  -d '{"inputs": {"principal": 400000, "annualRate": 6.75, "termYears": 30, "propertyTax": 5000, "homeInsurance": 1200, "monthlyHOA": 0, "downPayment": 80000}}'
Rate limiting

Honor-system rate limit of 100 requests/hour per origin. The X-RateLimit-Limit header is returned on every response. Hard enforcement coming when API keys ship.

Available calculator slugs (38)

age
lifestyle
bmi
health
break-even
business
budget
financial
calories
health
compound-interest
financial
debt-payoff
financial
drip
business
dti
financial
emergency-fund
financial
freelance-rate
career
gpa
education
home-affordability
real-estate
hourly-salary
career
investment-fees
business
loan-comparison
financial
mortgage
real-estate
net-worth
financial
nps
business
options-profit
financial
paycheck
career
payoff
financial
portfolio-rebalancer
financial
quarterly-safe-harbor
career
quarterly-tax
career
self-employment-tax
career
rental-roi
real-estate
retirement
financial
roth-vs-traditional
financial
savings-rate
financial
sleep
health
social-security
financial
stock-profit
financial
tax-estimator
financial
tip
lifestyle
true-hourly-rate
career
unit-converter
lifestyle
w2-vs-1099
career

On the roadmap

→
API keys— Usage tracking, rate-limit enforcement, per-key quotas
→
XP attribution— Award XP to your users when they run calculations via the API
→
Webhook callbacks— POST results to your endpoint instead of waiting on the response
→
Batch endpoint— Run multiple calculators in a single request