Can you use Claude Code without an Anthropic API key?
Quick Answer: Yes. As of April 2026, Claude Code supports authentication via a Claude Pro, Max, or Team plan in addition to a pay-per-token Anthropic API key. Pro and Max plans include Claude Code usage at no extra cost subject to plan-level rate limits.
Claude Code Authentication Without an API Key
Anthropic offers three ways to authenticate Claude Code as of April 2026.
Option 1 — Claude Pro or Max Plan
Subscribers to Claude Pro ($20/month) or Claude Max can sign in with their claude.ai account. Claude Code usage counts against the same plan-wide message limits as the chat product, with separate pools for Sonnet and Opus.
- No API key required
- Predictable monthly cost
- Subject to per-window message caps
This is the simplest setup for individual developers and is the recommended path for casual to moderate use.
Option 2 — Team or Enterprise Plan
Anthropic Team and Enterprise plans include Claude Code seats with admin controls (SSO, audit logs, usage caps per user). Authentication is handled via the workspace SSO; no individual API keys are needed.
Option 3 — Anthropic API Key
For maximum flexibility (custom rate limits, different billing entity), set ANTHROPIC_API_KEY in the environment or via claude /login. Usage is billed per token at the standard API rate.
Option 4 — Cloud Provider Routes
Claude Code also supports Amazon Bedrock and Google Vertex AI as backends. Set CLAUDE_CODE_USE_BEDROCK=1 (or the Vertex equivalent) and configure the provider credentials. This is common for enterprises with existing AWS or GCP commitments and strict data-locality requirements.
Choosing
- Individuals on Claude Pro: use the Pro plan
- Teams: SSO via Team/Enterprise plan
- Highest flexibility or specific compliance: API key or cloud provider routing