# FinCalc API

Send a calculator its inputs and get a calculated result back. Each calculator is one endpoint,
`POST /v2/calculators/{slug}`, documented in the [API Reference](/api).

Requests are authenticated with an API key sent as a bearer token:

```http
POST /v2/calculators/retirement-planning
Authorization: Bearer <your API key>
Content-Type: application/json
```

API keys are issued from the FinCalc console by your institution's administrator.

{/* Placeholder. Getting-started content — authentication, errors, rate limits, bundle selection
    and deprecation (Sunset) headers — is written when the portal goes public. The API reference
    is generated; never edit docs/public/openapi.json by hand. */}