This guide details how to use Anthropic's Claude Messages API to build an agent capable of tool use. It explains the four-step agent loop: defining tools, having Claude decide when to use them, executing the tool on the user's side, and returning the result to Claude for a final answer. The article also highlights the integration with the official Anthropic SDK via Ace Data Cloud and introduces a free Count Tokens endpoint for cost estimation. AI
IMPACT Enables developers to build more sophisticated AI agents by integrating external tools with Claude models.
RANK_REASON Article describes how to use an existing API for a specific application (building an agent), rather than a new product release or significant industry event.
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