Claude

Claude chat on web and mobile

API dashboard and workbench

Create and manage API keys (sign-in required)

API usage and credits (sign-in required)

API, models, and prompting guides

Official docs for the terminal AI coding agent

Official free learning courses

Official course notebooks repository

The go-to reference on agent design patterns

How Claude's research feature was built with multiple agents

The announcement that launched the MCP standard

The legendary interpretability demo

Claude running a small vending business