Agents SDK: New web_search tool powered by Cloudflare Web Search API

The Cloudflare Agents SDK now provides a web_search tool that searches the public web through the Cloudflare Web Search API, powered by ceramic.ai, Exa, and Linkup.

When you give the web_search tool to your agent, the model provides a query and max results, and receives back a short numbered list of titles, URLs, and trimmed descriptions. When you also provide the web_fetch tool to your agent, the model is told to use it to read the pages that the web_search tool returns.

To use the web_search tool, make sure you have Agents SDK v0.27.0 ↗︎ or greater installed, and add it to a Pi Durable extension registry before opening the harness:

import { webSearchTool } from "agents/websearch/pi";

export class MyAgent extends DurableObject {
	// ...

	harness = new PiHarness({
		harness: async ({ storage, context }) => {
			this.registry.install({
				name: "web-tools",
				tools: [webSearchTool({ binding: this.env.AI, provider: "exa" })],
			});

			// ...

			return Harness.open(
				storage,
				{ models, registry: this.registry },
				context,
			);
		},
	});
}

import { webSearchTool } from "agents/websearch/pi";

export class MyAgent extends DurableObject<Env> {
	// ...

	readonly harness = new PiHarness({
		harness: async ({ storage, context }) => {
			this.registry.install({
				name: "web-tools",
				tools: [webSearchTool({ binding: this.env.AI, provider: "exa" })],
			});

			// ...

			return Harness.open(
				storage,
				{ models, registry: this.registry },
				context,
			);
		},
	});
}

The SDK also includes AI SDK and TanStack AI adapters. To search without a model, such as from a scheduled job, use createAIWebSearch() or createHTTPWebSearch() from agents/websearch.

For setup, options, and error handling, refer to Web search.