API Reference

HTTP reference and schemas for public Kadryn integration surfaces.

## How to use this section

Start with the page that matches your goal, then follow the related links at the end of the page. Each page is written as an operational guide: what the page is for, who should use it, what you can do, how to verify success, and what to check when something does not work.

## Pages in this section

### Overview

Understand the API reference model.

Open: Overview

Authentication

Authenticate HTTP calls.

Open: Authentication

Gateway API

Send provider-compatible runtime requests.

Open: Gateway API

Usage Ingestion API

Submit normalized usage events.

Open: Usage Ingestion API

Webhooks API

Manage and understand webhook delivery events.

Open: Webhooks API

Projects API

Reference project endpoints.

Open: Projects API

Costs API

Reference cost data endpoints.

Open: Costs API

Alerts API

Reference alert endpoints.

Open: Alerts API

Guardrails API

Reference governance endpoints.

Open: Guardrails API

Recommendations API

Reference optimization endpoints.

Open: Recommendations API

Reports API

Reference report endpoints.

Open: Reports API

Errors

Understand error classes.

Open: Errors

Pagination

Use cursor pagination.

Open: Pagination

Rate limits

Handle throttling.

Open: Rate limits

Idempotency

Make retryable writes safe.

Open: Idempotency

Schemas

Understand shared JSON shapes.

Open: Schemas