OpenRouter Launches Server Tools Marketplace for Agent Grounding and Tool Search

Key Info

OpenRouter unveiled a Server Tools Marketplace offering web search, Shell, and tool search APIs to ground agents, with tool search keeping large tool libraries out of the prompt via defer_loading.

Highlights

• The marketplace includes web search APIs, Shell, tool search, and more for grounding agents.
• Tool search marks functions with defer_loading so models search only when needed, avoiding input token overhead for every tool definition each turn, at no extra charge.
• Additional tools: Advisor, Subagent, Web fetch, Image generation, Apply patch, and Datetime, most running server-side without a client-side tool loop.
• Providers, pricing, and working request examples are available in the marketplace.