Claude API relay

Pay as you go and call Claude models directly — your own key, custom usage limits.

Your own key

Generate your API key; rotate or revoke any time.

Usage control

Set daily / monthly usage and budget caps; overage auto-blocks.

Metered billing

Billed by actual token usage, no minimum spend.

Quick start

Compatible with the official SDK — just swap the base_url.

curl https://api.aiplussub.com/v1/messages \
  -H "x-api-key: $AIPLUSSUB_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model":"claude-opus-4-8","max_tokens":1024,
       "messages":[{"role":"user","content":"Hello"}]}'