Get your Anthropic API Key
Access Claude Opus, Sonnet, and Haiku models.
Step-by-step
1
Create an Anthropic account
Go to console.anthropic.com and sign up or log in.
2
Navigate to API keys
Go to console.anthropic.com/settings/keys or click Settings → API keys in the sidebar.
3
Create a new key
Click Create Key. Name it "AgentVoy". Copy the key immediately.
4
Add billing
Go to Billing and add credits. New accounts start on Tier 1 ($5 credits). Claude Sonnet costs ~$3 per million input tokens.
Note: Some models (like Claude Opus) require higher tiers. Check your tier at Settings → Limits.
5
Add to your .env
ANTHROPIC_API_KEY=sk-ant-api03-...
Your key starts with sk-ant-api03-.
Compatible frameworks
Anthropic SDKCrewAILangGraphLlamaIndexAutoGen
Available models
| Model | Best for | Tier |
|---|---|---|
| claude-sonnet-4-20250514 | Best balance of speed and intelligence | Tier 1+ |
| claude-opus-4-20250514 | Most capable, complex tasks | Tier 2+ |
| claude-haiku-4-5-20251001 | Fast and cost-effective | Tier 1+ |