Run Claude Code without an Anthropic account

SeaLink's Anthropic-compatible endpoint lets Claude Code run with a SeaLink key — no Anthropic signup, no US card needed.

Claude Sonnet 4.6 Claude Opus 4.7· 3 min read

Why this matters in SEA

Anthropic doesn't directly serve many SEA countries, and signups often fail at phone or card verification. SeaLink gives you an Anthropic-compatible endpoint with SeaLink billing and support.

Set the env vars

Claude Code reads ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN. Point both at SeaLink.

shell

export ANTHROPIC_BASE_URL="https://api.sealink.asia/anthropic"
export ANTHROPIC_AUTH_TOKEN="<your-sealink-key>"

# now run Claude Code as usual
claude

Pick a model

Inside Claude Code, /model claude-sonnet-4-6 (default for everyday work) or /model claude-opus-4-7 (deep refactors).

Done

SeaLink bills your balance, keeps monthly billing records for Builder plans and above, and surfaces usage in the dashboard.

Next steps

Create a free SeaLink account
Estimate monthly cost
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