--- source_url: "https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool?utm_source=openai" title: Web search tool - Claude Platform Docs mirrored_at: 2026-08-14T01:00:58.485Z host: platform.claude.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool__q__utm_source_openai" --- > **Original source:** https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool?utm_source=openai First steps [Intro to Claude](https://platform.claude.com/docs/en/intro)[Get your API key](https://platform.claude.com/docs/en/get-api-key)[Quickstart](https://platform.claude.com/docs/en/get-started)[Authentication](https://platform.claude.com/docs/en/manage-claude/authentication) Building with Claude [Features overview](https://platform.claude.com/docs/en/build-with-claude/overview)[Using the Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages)[Stop reasons and fallback](https://platform.claude.com/docs/en/build-with-claude/handling-stop-reasons)[Refusals and fallback](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback)[Fallback credit](https://platform.claude.com/docs/en/build-with-claude/fallback-credit) Model capabilities [Effort](https://platform.claude.com/docs/en/build-with-claude/effort)[Task budgets (beta)](https://platform.claude.com/docs/en/build-with-claude/task-budgets)[Fast mode (research preview)](https://platform.claude.com/docs/en/build-with-claude/fast-mode)[Structured outputs](https://platform.claude.com/docs/en/build-with-claude/structured-outputs)[Citations](https://platform.claude.com/docs/en/build-with-claude/citations)[Streaming Messages](https://platform.claude.com/docs/en/build-with-claude/streaming)[Batch processing](https://platform.claude.com/docs/en/build-with-claude/batch-processing)[Search results](https://platform.claude.com/docs/en/build-with-claude/search-results)[Streaming refusals](https://platform.claude.com/docs/en/test-and-evaluate/strengthen-guardrails/handle-streaming-refusals)[Multilingual support](https://platform.claude.com/docs/en/build-with-claude/multilingual-support)[Embeddings](https://platform.claude.com/docs/en/build-with-claude/embeddings) Tools [Overview](https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview)[How tool use works](https://platform.claude.com/docs/en/agents-and-tools/tool-use/how-tool-use-works)[Tutorial: Build a tool-using agent](https://platform.claude.com/docs/en/agents-and-tools/tool-use/build-a-tool-using-agent)[Define tools](https://platform.claude.com/docs/en/agents-and-tools/tool-use/define-tools)[Handle tool calls](https://platform.claude.com/docs/en/agents-and-tools/tool-use/handle-tool-calls)[Parallel tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/parallel-tool-use)[Tool Runner (SDK)](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-runner)[Strict tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/strict-tool-use)[Server tools](https://platform.claude.com/docs/en/agents-and-tools/tool-use/server-tools)[Web search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool)[Web fetch tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool)[Code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool)[Advisor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool)[Tool search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool)[Memory tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/memory-tool)[Bash tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/bash-tool)[Text editor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/text-editor-tool)[Computer use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool)[Troubleshooting](https://platform.claude.com/docs/en/agents-and-tools/tool-use/troubleshooting-tool-use) Tool infrastructure [Tool reference](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-reference)[Manage tool context](https://platform.claude.com/docs/en/agents-and-tools/tool-use/manage-tool-context)[Tool combinations](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-combinations)[Tool use with prompt caching](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-use-with-prompt-caching)[Programmatic tool calling](https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling)[Fine-grained tool streaming](https://platform.claude.com/docs/en/agents-and-tools/tool-use/fine-grained-tool-streaming) Context management [Context windows](https://platform.claude.com/docs/en/build-with-claude/context-windows)[Compaction](https://platform.claude.com/docs/en/build-with-claude/compaction)[Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing)[Prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching)[Mid-conversation system messages and tool changes](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages)[Build an orchestration mode](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-effort-example)[Cache diagnostics (beta)](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics)[Token counting](https://platform.claude.com/docs/en/build-with-claude/token-counting) Working with files [Files API](https://platform.claude.com/docs/en/build-with-claude/files)[PDF support](https://platform.claude.com/docs/en/build-with-claude/pdf-support) Skills [Overview](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview)[Quickstart](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/quickstart)[Best practices](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/best-practices)[Skills for enterprise](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/enterprise)[Skills in the API](https://platform.claude.com/docs/en/build-with-claude/skills-guide) MCP [Remote MCP servers](https://platform.claude.com/docs/en/agents-and-tools/remote-mcp-servers)[MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector) Claude on cloud platforms [Amazon Bedrock (Opus 4.7 and later)](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock)[Amazon Bedrock (Opus 4.6 and earlier)](https://platform.claude.com/docs/en/build-with-claude/claude-on-amazon-bedrock-legacy)[Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws)[Google Cloud](https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai)[Microsoft Foundry](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry)