🔌 API & Authentication

Call any calculator over REST: quickstart, API keys, and usage limits.

• API Quickstart

  Make your first calculator call in minutes with a single POST request, then read the structured JSON result.

• Authentication & API Keys

  Create an API key in the developer portal, send it with every request, and keep it secure.

• Calculator Endpoints & Responses

  How to find a tool id, send its inputs, read the JSON result, and discover every available calculator.

• Rate Limits & Usage

  How monthly allowances and per-minute limits work by plan, and what happens when you reach them.

• Webhooks

  Receive signed events from NumroQ at your own endpoint, verify them, and react in your app.

• Error Handling

  The status codes the API returns, what each means, and how to handle them gracefully in production.