Build Claude apps with documented API patterns.
Guides developers in building Claude-powered applications with documented API and SDK patterns.
When to use it
Use for Claude or Anthropic requests, LLM questions, and LLM-shaped tasks without a named provider; skip when another provider is being worked on.
It changes how the agent implements Claude features by requiring documented official SDK patterns or explicitly justified raw HTTP.
What you provide
API calls can authenticate with this environment variable; it takes precedence over the token, OAuth profiles, and federation credentials.
This environment variable is an alternative authentication source, checked after ANTHROPIC_API_KEY and before OAuth profiles.
This skill
Claude API
Sends paid test requests to Claude (irreversible)
Managed Agents
Starts hosted agent sessions
Syncs hosted agent configurations