Updated · SI-API

One connection. All seven models.

Connect an application, automate a workflow or set up your Agent. One key works across the model catalog; choose how you pay in Billing.

API setup

Connect your application with your SI-API key, base URL and model ID.

API setup →

Moving from another provider? →

Agent

Prefer to skip manual setup? Ask AI to do it for you.

AI setup prompt

Follow https://siapi.ai/docs to connect my Agent to all SI-API models. Preserve existing settings and ask for my API key when needed.

Connect once to use all seven models. Switch models and reasoning effort inside your Agent with the same key.

Agent compatibility — Client versions, tested reasoning fields and known limits.

Manage your billing preference in the console. Your tool configuration stays the same. Billing basics →

SI-API vs OpenRouter: API Costs for Coding and Everyday Use