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---
title: Documentation
url: https://platform.claude.com/docs/en/home
description: Claude API Documentation
---

<HomePage>
  <HomeHero
    eyebrow="Claude Platform"
    title="Start building
with Claude"
    subtitle="Everything you need to integrate Claude into your applications. From first API call to production."
  >
    <HomeQuickChip icon="Play" href="https://platform.claude.com/docs/en/get-started">
      Quickstart
    </HomeQuickChip>

    <HomeQuickChip icon="Key" href="https://platform.claude.com/settings/keys">
      Get API key
    </HomeQuickChip>

    <HomeQuickChip icon="CodeBrackets" href="https://platform.claude.com/docs/en/api/overview">
      API reference
    </HomeQuickChip>
  </HomeHero>

  <HomeSection>
    <HomeSectionHeader label="Platform" title="Choose how you build" description="Pick the developer surface that matches your approach, and the infrastructure that fits your stack." />

    <HomePlatformCards>
      <HomePlatformCard title="Messages" description="Direct model access. You construct every turn, manage conversation state, and write your own tool loop." pictogram="code-terminal">
        <HomeCardLink icon="play" href="https://platform.claude.com/docs/en/get-started">
          Quickstart
        </HomeCardLink>

        <HomeCardLink icon="book" href="https://platform.claude.com/docs/en/api/messages/create">
          API reference
        </HomeCardLink>

        <HomeCardLink icon="code-brackets" href="https://platform.claude.com/docs/en/api/client-sdks">
          Client SDKs
        </HomeCardLink>
      </HomePlatformCard>

      <HomePlatformCard title="Managed Agents" description="Fully managed agent infrastructure. Deploy and manage autonomous agents in stateful sessions with persistent event history." pictogram="clouds">
        <HomeCardLink icon="play" href="https://platform.claude.com/docs/en/managed-agents/quickstart">
          Quickstart
        </HomeCardLink>

        <HomeCardLink icon="book" href="https://platform.claude.com/docs/en/api/beta/sessions">
          API reference
        </HomeCardLink>

        <HomeCardLink icon="brain" href="https://platform.claude.com/docs/en/managed-agents/agent-setup">
          Define your agent
        </HomeCardLink>
      </HomePlatformCard>
    </HomePlatformCards>

    <HomePartnerLinks label="Claude is also available on these cloud platforms:">
      <HomeCloudPartnerLink icon="cloud" href="https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock">
        Amazon Bedrock
      </HomeCloudPartnerLink>

      <HomeCloudPartnerLink icon="cloud" href="https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai">
        Google Cloud
      </HomeCloudPartnerLink>

      <HomeCloudPartnerLink icon="cloud" href="https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry">
        Microsoft Foundry
      </HomeCloudPartnerLink>
    </HomePartnerLinks>
  </HomeSection>

  <HomeSection>
    <HomeSectionHeader label="Developer journey" title="From idea to production" description="Follow the lifecycle or jump to what you need." />

    <HomeJourney>
      <HomeJourneyTab label="Messages">
        <HomeJourneyStep title="Get started">
          <HomeJourneyLink icon="play" href="https://platform.claude.com/docs/en/get-started">
            Quickstart
          </HomeJourneyLink>

          <HomeJourneyLink icon="lock" href="https://platform.claude.com/settings/keys">
            Get API key
          </HomeJourneyLink>

          <HomeJourneyLink icon="settings" href="https://platform.claude.com/docs/en/about-claude/models/overview">
            Choose a model
          </HomeJourneyLink>

          <HomeJourneyLink icon="code-brackets" href="https://platform.claude.com/docs/en/api/client-sdks">
            Install an SDK
          </HomeJourneyLink>

          <HomeJourneyLink icon="message" href="https://platform.claude.com/playground">
            Try the Workbench
          </HomeJourneyLink>
        </HomeJourneyStep>

        <HomeJourneyStep title="Build">
          <HomeJourneyLink icon="message" href="https://platform.claude.com/docs/en/api/messages/create">
            Messages API
          </HomeJourneyLink>

          <HomeJourneyLink icon="brain" href="https://platform.claude.com/docs/en/build-with-claude/thinking">
            Thinking
          </HomeJourneyLink>

          <HomeJourneyLink icon="image" href="https://platform.claude.com/docs/en/build-with-claude/vision">
            Vision
          </HomeJourneyLink>

          <HomeJourneyLink icon="tool" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview">
            Tool use
          </HomeJourneyLink>

          <HomeJourneyLink icon="compass" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool">
            Web search
          </HomeJourneyLink>

          <HomeJourneyLink icon="code" href="https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool">
            Code execution
          </HomeJourneyLink>

          <HomeJourneyLink icon="database" href="https://platform.claude.com/docs/en/build-with-claude/structured-outputs">
            Structured outputs
          </HomeJourneyLink>

          <HomeJourneyLink icon="lightning" href="https://platform.claude.com/docs/en/build-with-claude/prompt-caching">
            Prompt caching
          </HomeJourneyLink>

          <HomeJourneyLink icon="wifi-high" href="https://platform.claude.com/docs/en/build-with-claude/streaming">
            Streaming
          </HomeJourneyLink>
        </HomeJourneyStep>

        <HomeJourneyStep title="Evaluate and ship">
          <HomeJourneyLink icon="lightbulb" href="https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/overview">
            Prompting best practices
          </HomeJourneyLink>

          <HomeJourneyLink icon="chart" href="https://platform.claude.com/docs/en/test-and-evaluate/develop-tests">
            Run evals
          </HomeJourneyLink>

          <HomeJourneyLink icon="stack" href="https://platform.claude.com/docs/en/build-with-claude/batch-processing">
            Batch testing
          </HomeJourneyLink>

          <HomeJourneyLink icon="verified" href="https://platform.claude.com/docs/en/test-and-evaluate/strengthen-guardrails/increase-consistency">
            Safety and guardrails
          </HomeJourneyLink>

          <HomeJourneyLink icon="bolt" href="https://platform.claude.com/docs/en/api/rate-limits">
            Rate limits and errors
          </HomeJourneyLink>

          <HomeJourneyLink icon="calculator" href="https://platform.claude.com/docs/en/about-claude/pricing">
            Cost optimization
          </HomeJourneyLink>
        </HomeJourneyStep>

        <HomeJourneyStep title="Operate">
          <HomeJourneyLink icon="settings" href="https://platform.claude.com/docs/en/build-with-claude/workspaces">
            Workspaces and admin
          </HomeJourneyLink>

          <HomeJourneyLink icon="lock" href="https://platform.claude.com/settings/keys">
            API key management
          </HomeJourneyLink>

          <HomeJourneyLink icon="chart" href="https://platform.claude.com/docs/en/build-with-claude/usage-cost-api">
            Usage monitoring
          </HomeJourneyLink>

          <HomeJourneyLink icon="settings" href="https://platform.claude.com/docs/en/about-claude/models/migration-guide">
            Model migration
          </HomeJourneyLink>
        </HomeJourneyStep>
      </HomeJourneyTab>

      <HomeJourneyTab label="Managed Agents">
        <HomeJourneyStep title="Get started">
          <HomeJourneyLink icon="play" href="https://platform.claude.com/docs/en/managed-agents/quickstart">
            Quickstart
          </HomeJourneyLink>

          <HomeJourneyLink icon="lock" href="https://platform.claude.com/settings/keys">
            Get API key
          </HomeJourneyLink>

          <HomeJourneyLink icon="message" href="https://platform.claude.com/docs/en/managed-agents/onboarding">
            Build in Console
          </HomeJourneyLink>
        </HomeJourneyStep>

        <HomeJourneyStep title="Define your agent">
          <HomeJourneyLink icon="brain" href="https://platform.claude.com/docs/en/managed-agents/agent-setup">
            Agent setup
          </HomeJourneyLink>

          <HomeJourneyLink icon="tool" href="https://platform.claude.com/docs/en/managed-agents/tools">
            Tools
          </HomeJourneyLink>

          <HomeJourneyLink icon="lock" href="https://platform.claude.com/docs/en/managed-agents/permission-policies">
            Tool permissions
          </HomeJourneyLink>
        </HomeJourneyStep>

        <HomeJourneyStep title="Run sessions">
          <HomeJourneyLink icon="wifi-high" href="https://platform.claude.com/docs/en/managed-agents/events-and-streaming">
            Streaming and events
          </HomeJourneyLink>

          <HomeJourneyLink icon="code-brackets" href="https://platform.claude.com/docs/en/api/beta/sessions">
            Sessions API reference
          </HomeJourneyLink>
        </HomeJourneyStep>

        <HomeJourneyStep title="Operate">
          <HomeJourneyLink icon="settings" href="https://platform.claude.com/docs/en/build-with-claude/workspaces">
            Workspaces and admin
          </HomeJourneyLink>

          <HomeJourneyLink icon="lock" href="https://platform.claude.com/settings/keys">
            API key management
          </HomeJourneyLink>

          <HomeJourneyLink icon="chart" href="https://platform.claude.com/docs/en/build-with-claude/usage-cost-api">
            Usage monitoring
          </HomeJourneyLink>
        </HomeJourneyStep>
      </HomeJourneyTab>
    </HomeJourney>
  </HomeSection>

  <HomeSection>
    <HomeSectionHeader label="Models" title="The Claude model family" description="Choose the right model for your use case." />

    <HomeModelCards>
      <HomeModelCard name="Fable 5" badge="Most capable" modelId="claude-fable-5" description="Highest capability for the most demanding reasoning and long-horizon agentic work." href="https://platform.claude.com/docs/en/about-claude/models/overview" />

      <HomeModelCard name="Opus 5" badge="Advanced" modelId="claude-opus-5" description="Excellent for complex analysis, coding, and creative tasks requiring deep reasoning." href="https://platform.claude.com/docs/en/about-claude/models/overview" />

      <HomeModelCard name="Sonnet 5" badge="Best balance" modelId="claude-sonnet-5" description="Ideal balance of intelligence and speed for most production workloads." href="https://platform.claude.com/docs/en/about-claude/models/overview" />

      <HomeModelCard name="Haiku 4.5" badge="Fastest" modelId="claude-haiku-4-5" description="Lightning-fast responses for high-volume, latency-sensitive applications." href="https://platform.claude.com/docs/en/about-claude/models/overview" />
    </HomeModelCards>
  </HomeSection>

  <HomeSection last>
    <HomeSectionHeader label="Resources" title="Keep learning" />

    <CardGroup cols={3}>
      <Card icon="graduation-cap" title="Courses" href="https://anthropic.skilljar.com/">
        Interactive courses to master Claude.
      </Card>

      <Card icon="book" title="Cookbook" href="https://platform.claude.com/cookbook">
        Code samples and patterns.
      </Card>

      <Card icon="play" title="Quickstarts" href="https://github.com/anthropics/anthropic-quickstarts">
        Deployable starter apps.
      </Card>

      <Card icon="star" title="What's new" href="https://platform.claude.com/docs/en/release-notes/overview">
        Latest features and updates.
      </Card>

      <Card icon="terminal" title="Claude Code" href="https://code.claude.com/docs">
        An agentic coding assistant in your terminal.
      </Card>
    </CardGroup>
  </HomeSection>
</HomePage>

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