Use Claude Opus, Sonnet & Haiku in your favorite IDE. One API key, all models. Pay with USDT, start coding in minutes.
$ curl https://api.opusmax.live/v1/messages \
-H "x-api-key: sk-..." \
-H "content-type: application/json" \
-d '{"model":"claude-sonnet-4-6",
"messages":[{"role":"user",
"content":"Hello"}]}'
Enterprise-grade controls with zero setup overhead.
Assign dollar budgets to each API key with rolling 5-hour windows. Track spend in real time and never overshoot.
SSE streaming pass-through with no buffering. Tokens arrive at your client the instant Anthropic emits them.
Cache tokens are free. Reuse system prompts across requests to cut latency and cost.
Drop-in replacement for the Anthropic API. Works with the official Python and TypeScript SDKs.
Full support for tool use and MCP integrations. Build agents that call external services.
Choose the right model for your workload. One endpoint, one key.
claude-opus-4-6Most capable model for complex reasoning and analysis
claude-sonnet-4-6Best balance of speed and intelligence for most tasks
claude-haiku-4-5-20251001Fastest responses for high-throughput workloads
The only change is your base URL. Your existing Anthropic SDK code, cURL scripts, and IDE integrations work without modification. Swap one line, keep everything else.
base_url = "https://api.anthropic.com"
base_url = "https://api.opusmax.live"
Up and running in under a minute.
Sign up in seconds. Pick a plan that fits — trial from $10 USDT.
Send USDT (TRC20) and get your API key delivered instantly.
Swap your base URL to api.opusmax.live. Claude Code, Cursor, VS Code — all work.