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Claude Code

Anthropic's official CLI, pointed at clawfeeder.ai

Protocol: AnthropicLast verified 2026-05-19

Claude Code is Anthropic's terminal-native coding agent. Out of the box it talks to api.anthropic.com; with two environment variables you can route every call through clawfeeder.ai instead and pay in credits.

Prerequisites

Node.js 18+ for the `claude-code` install, and a clawfeeder API key (cf-sk-***) generated under /dashboard.

Steps

1Install Claude Code

If you haven't already, install the CLI globally with npm.

npm install -g @anthropic-ai/claude-code

2Point Claude Code at clawfeeder

Set ANTHROPIC_BASE_URL to clawfeeder's bare host (no /v1 suffix — Claude Code's underlying Anthropic SDK appends /v1/messages itself) and ANTHROPIC_API_KEY to your cf-sk-*** key. Persist these in your shell rc file.

export ANTHROPIC_BASE_URL="https://clawfeeder.ai"
export ANTHROPIC_API_KEY="cf-sk-***your_key***"

3Pick a model

Claude Code defaults to claude-opus-4-7. Any model in clawfeeder's catalog (see /docs#models) is usable; use --model to switch per session.

claude-code --model claude-sonnet-4-6   # 更便宜的日常模型
claude-code --model claude-opus-4-7     # 旗舰模型,默认

4Start coding

Run `claude-code` in any project directory. Credits debit on each completed response — check /dashboard to watch your balance.

cd ~/my-project
claude-code

Verify

Quick sanity check — send a single message via curl directly to confirm the gateway and key work, before invoking the full CLI.

curl -X POST "https://clawfeeder.ai/v1/messages" \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{"model":"claude-haiku-4-5-20251001","max_tokens":50,"messages":[{"role":"user","content":"reply with the word READY"}]}'

Expected response includes: "text":"READY"

FAQ

Does Claude Code work with cf-sk-*** keys exactly like Anthropic keys?

Yes. clawfeeder accepts cf-sk-*** in either the x-api-key header (Anthropic SDK default) or Authorization: Bearer. Claude Code uses x-api-key, so no change needed.

Why am I seeing 401 unauthorized?

Most often the env vars weren't exported in the shell that launched claude-code. Run `echo $ANTHROPIC_BASE_URL $ANTHROPIC_API_KEY` to confirm. The key must start with cf-sk-; sk-ant-* keys belong to Anthropic direct and won't validate here.

Can I use Claude Code's prompt caching?

Claude Code's cache_control flag passes through, but cache hit-rate depends on the upstream behavior. As of v1.11, prompt cache pass-through is not reliably guaranteed end-to-end — treat any savings as best-effort.

How do I switch back to Anthropic direct?

Unset both env vars (or set ANTHROPIC_BASE_URL=https://api.anthropic.com and ANTHROPIC_API_KEY=sk-ant-***). Note: Anthropic direct uses the same bare-host convention. Claude Code reads these env vars on every launch.

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