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The OpenRouter Agent SDK gives you callModel: one function that turns a chat completion into a multi-step agent with tool calls, stop conditions, and cost tracking across 400+ models.
What RADAR observed and classified to build this opportunity. It is what the source published, not a verification that the offer is still active.
Agent SDK: Building Multi-turn Agent Workflows on OpenRouter. The OpenRouter Agent SDK gives you callModel: one function that turns a chat completion into a multi-step agent with tool calls, stop conditions, and cost tracking across 400+ models.
Open sourceThe catalog shows persisted RADAR opportunities. Storage availability does not mean sources are verified or offers are active.