Claude Platform Docs

Messages
Managed Agents
Admin

API reference

Console Log in

First steps

Intro to Claude Get your API key Quickstart Authentication

Building with Claude

Features overview Using the Messages API Stop reasons and fallback Refusals and fallback Fallback credit

Model capabilities

Effort Task budgets (beta)Fast mode (research preview)Structured outputs Citations Streaming Messages Batch processing Search results Streaming refusals Multilingual support Embeddings

Tools

Overview How tool use works Tutorial: Build a tool-using agent Define tools Handle tool calls Parallel tool use Tool Runner (SDK)Strict tool use Server tools Web search tool Web fetch tool Code execution tool Advisor tool Tool search tool Memory tool Bash tool Text editor tool Computer use tool Troubleshooting

Tool infrastructure

Tool reference Manage tool context Tool combinations Tool use with prompt caching Programmatic tool calling Fine-grained tool streaming

Context management

Context windows Compaction Context editing Prompt caching Mid-conversation system messages and tool changes Build an orchestration mode Cache diagnostics (beta)Token counting

Working with files

Files API PDF support

Skills

Overview Quickstart Best practices Skills for enterprise Skills in the API

MCP

Remote MCP servers MCP connector

Claude on cloud platforms

Amazon Bedrock (Opus 4.7 and later)Amazon Bedrock (Opus 4.6 and earlier)Claude Platform on AWS Google Cloud Microsoft Foundry

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Engineering at Anthropic
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Help and security

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Terms and policies

Privacy policy
Responsible disclosure policy
Terms of service: Commercial
Terms of service: Consumer
Usage policy

MessagesFirst steps

Get your Claude API key

Find, create, and manage your API keys for the Claude API in the Claude Console.

API keys for the Claude API (also called Anthropic API keys) live in the Claude Console. To view your existing keys or create a new one, go to Settings → API keys.

Create an API key

Sign in to the Claude Console
Go to platform.claude.com and sign in, or create an account if you don't have one yet.