Use Relixr with Claude Code

Swap ANTHROPIC_BASE_URL to run Claude Code through Relixr, with a spend cap on every agent session.

Claude Code runs unattended for long stretches — exactly the workload where a subscription's soft rate limit turns into a stalled session, and an uncapped API key turns into a bill you didn't expect. Relixr gives Claude Code a spend cap instead of either.

1. Create a scoped key

Create an inference key named claude-code, with a daily cap. Because Claude Code can spend continuously during a long agentic session, set the cap to what you're willing to lose to a bug in your own prompt loop, not just your average day.

2. Set the base URL

Claude Code reads its endpoint from an environment variable:

zsh

$ export ANTHROPIC_BASE_URL="https://gateway.relixr.com"
export ANTHROPIC_API_KEY="nf_live_your_key_here"
claude

Tip:

Add both export lines to your shell profile if you want every terminal to default to Relixr. Unset ANTHROPIC_BASE_URL for a session to fall back to Anthropic directly.

3. Confirm requests are attributed

Every request from this key shows up in Usage tagged with the key name (claude-code), so if you run Claude Code across multiple projects, create one key per project instead of reusing this one — attribution is per-key, not per-process.

Warning:

If a session needs to spend more than the cap allows, Relixr returns a typed 402 rather than silently failing — Claude Code will surface this as an API error, which is the intended stop, not a bug.

Next steps

Use Relixr with VS Code

Continue, Cline, Roo Code, and Copilot BYOK.

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