Anthropic
Sign in to claimAI safety company; creator of the Claude family of models and Claude Code.
Claude 3 Haiku
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Claude 3 Opus
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Claude 3 Sonnet
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Claude 3.5 Haiku
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Claude 3.5 Sonnet
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Claude 3.7 Sonnet
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Claude Fable 5
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Claude Haiku 4.5
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Claude Mythos 5
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Claude Opus 4
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Claude Opus 4.1
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Claude Opus 4.5
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Claude Opus 4.6
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Claude Opus 4.7
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Claude Opus 4.8
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Claude Opus 5
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Claude Sonnet 4
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Claude Sonnet 4.5
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Claude Sonnet 4.6
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Claude Sonnet 5
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Anthropic SDK
The official Anthropic SDK provides a clean interface for accessing Claude models. Features include streaming, tool use, vision support, and automatic retries. Available for Python and TypeScript/JavaScript.
Claude Agent SDK
The Claude Agent SDK (formerly the Claude Code SDK) lets developers build custom AI agents on the same harness that powers Claude Code, with support for custom tools, hooks, MCP servers, and bidirectional streaming sessions. Available for Python and TypeScript.
Claude Code
Claude Code is Anthropic's official CLI tool for agentic coding. It allows Claude to operate as an autonomous coding agent, reading and writing files, executing commands, and iterating on solutions with minimal human intervention. Perfect for complex multi-file refactoring, adding new features, and debugging.
Filesystem MCP Server
Anthropic's reference Model Context Protocol server for reading and writing local files with configurable access controls. Part of the official servers collection, it is a common building block for giving agents safe filesystem access.
Official MCP Registry
The Official MCP Registry is the centralized metadata repository for publicly accessible Model Context Protocol servers, backed by Anthropic, GitHub, PulseMCP and Microsoft. It does not host packages itself: it stores metadata pointing at packages in existing registries, so a server published to npm can be discovered and version-resolved through one place instead of scattered READMEs.