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    First steps
    Intro to ClaudeQuickstart
    Models & pricing
    Models overviewChoosing a modelWhat's new in Claude 4.6Migration guideModel deprecationsPricing
    Build with Claude
    Features overviewUsing the Messages APIHandling stop reasonsPrompting best practices
    Model capabilities
    Extended thinkingAdaptive thinkingEffortFast mode (research preview)Structured outputsCitationsStreaming MessagesBatch processingPDF supportSearch resultsMultilingual supportEmbeddingsVision
    Tools
    OverviewHow to implement tool useWeb search toolWeb fetch toolCode execution toolMemory toolBash toolComputer use toolText editor tool
    Tool infrastructure
    Tool searchProgrammatic tool callingFine-grained tool streaming
    Context management
    Context windowsCompactionContext editingPrompt cachingToken counting
    Files & assets
    Files API
    Agent Skills
    OverviewQuickstartBest practicesSkills for enterpriseUsing Skills with the API
    Agent SDK
    OverviewQuickstartTypeScript SDKTypeScript V2 (preview)Python SDKMigration Guide
    MCP in the API
    MCP connectorRemote MCP servers
    Claude on 3rd-party platforms
    Amazon BedrockMicrosoft FoundryVertex AI
    Prompt engineering
    OverviewPrompt generatorUse prompt templatesPrompt improverBe clear and directUse examples (multishot prompting)Let Claude think (CoT)Use XML tagsGive Claude a role (system prompts)Chain complex promptsLong context tipsExtended thinking tips
    Test & evaluate
    Define success and build evaluationsUsing the Evaluation ToolReducing latency
    Strengthen guardrails
    Reduce hallucinationsIncrease output consistencyMitigate jailbreaksStreaming refusalsReduce prompt leak
    Administration and monitoring
    Admin API overviewData residencyWorkspacesUsage and Cost APIClaude Code Analytics APIZero Data Retention
    Console
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    Solutions

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    Learn

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    • Engineering at Anthropic
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    • Service partners
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    • Terms of service: Commercial
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    First steps

    Get started with Claude

    Make your first API call to Claude and build a simple web search assistant.

    Prerequisites

    • An Anthropic Console account
    • An API key

    Call the API

    Next steps

    You made your first API call. Next, learn the Messages API patterns you'll use in every Claude integration.

    Working with the Messages API

    Learn multi-turn conversations, system prompts, stop reasons, and other core patterns.

    Once you're comfortable with the basics, explore further:

    Models overview

    Compare Claude models by capability and cost.

    Features overview

    Browse all Claude capabilities: tools, context management, structured outputs, and more.

    Client SDKs

    Reference documentation for Python, TypeScript, Java, and other client libraries.

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    • Prerequisites
    • Call the API
    • Next steps