API Documentation

Introduction

cinAPI gives you one API key for every LLM — Claude (Opus / Sonnet / Haiku) and Gemini — behind a single REST endpoint. You're billed in credits at a fixed price per model. No token math.

How it works (async in 3 steps)

1. 1

   Create a call

   POST your prompt to /api/v1/calls. You get back a call.id and status: queued instantly.
2. 2

   Wait for it to finish

   Poll GET /api/v1/calls/{id} or subscribe to /stream (SSE) until status: succeeded.
3. 3

   Read the result

   The finished call contains output.text (the answer) plus token usage and the credits charged.

Base URL

https://api.cinapi.dev/api/v1