Claude Code on Layer X1.

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One command

npx layerx1 setup --tool claude-code --key lx1_your_key

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By hand

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.layerx1.com",
    "ANTHROPIC_AUTH_TOKEN": "lx1_your_key",
    "ANTHROPIC_MODEL": "lx1-sonnet-4.6",
    "ANTHROPIC_SMALL_FAST_MODEL": "lx1-glm-4.7-flash"
  }
}

export ANTHROPIC_BASE_URL=https://api.layerx1.com
export ANTHROPIC_AUTH_TOKEN=lx1_your_key
export ANTHROPIC_MODEL=lx1-sonnet-4.6
export ANTHROPIC_SMALL_FAST_MODEL=lx1-glm-4.7-flash

• ANTHROPIC_BASE_URL — the gateway origin only. Do not append /v1; Claude Code adds /v1/messages itself.
• ANTHROPIC_AUTH_TOKEN — your lx1_ key.
• ANTHROPIC_MODEL — the main model. lx1-sonnet-4.6 for the premium ceiling (vision, top reasoning), or lx1-gpt-oss-120b for a fast everyday driver. Any catalog id works.
• ANTHROPIC_SMALL_FAST_MODEL — the model for quick auxiliary calls; lx1-glm-4.7-flash keeps them near-free.

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Verify

npx layerx1 test --key lx1_your_key

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Troubleshooting

• Still using your Anthropic account? If you were signed in before, run /logout once so Claude Code picks up ANTHROPIC_AUTH_TOKEN instead of the stored session.
• 404s on every call? The base URL probably includes /v1 — use the bare origin.
• 401 unauthorized? The key must be in ANTHROPIC_AUTH_TOKEN (not ANTHROPIC_API_KEY) for a gateway base URL.
• Context meter looks off? Claude Code budgets with count_tokens, which returns an estimate — billing always uses exact usage from real responses.