OpenRouter — Unified LLM API Gateway

Overview

OpenRouter exposes one endpoint, https://openrouter.ai/api/v1, whose request and response format follows the OpenAI Chat Completions API. The model is picked with a vendor/model slug, and OpenRouter handles provider selection, fallbacks and billing. The catalog changes constantly: models are added and retired every month, so never hard-code a slug from memory. List the current ones with GET https://openrouter.ai/api/v1/models (public, no key needed).

Ways to call it:

• plain HTTP or the OpenAI SDK with a changed baseURL (existing code keeps working);
• the official client SDKs: @openrouter/sdk (TypeScript) and openrouter (Python);
• the Agent SDK @openrouter/agent (tool loops through callModel);
• the Vercel AI SDK provider @openrouter/ai-sdk-provider.

Instructions

1. Get a key and install

Create a key at openrouter.ai/settings/keys and export it. Set a credit limit on the key at creation time.