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Developer API

Financial Calculation API

35+ endpoints for financial calculations. No authentication required, rate-limited to 120 req/hour. Deployed globally on Cloudflare.

Getting Started

Every calculator on LikeOptions is available as a JSON endpoint. Send numeric inputs, get structured results back.

POST https://likeoptions.com/api/v1/calculate/mortgage

Send JSON body with parameters for each calculator.

Response format: {kind: "mortgage", result: {primary: 1439, secondary: [...]}}

Rate Limiting & Limits

120 requests per hour per client IP. Exceeding this returns HTTP 429. No authentication, no API key required. All calculations are stateless and not persisted.

This is a free v1 API. Multi-leg options strategies (builder, scenario lab) are not exposed via API.

Endpoint Categories

Code Examples

View code examples in JavaScript, Python, cURL, and more →