Quick Start

Three steps, a few minutes.

1. Create an API key

A monthly subscription uses a subscription key, with supported models sharing the plan quota. Pay-as-you-go API billing uses a separate key and balance. Select the matching key type in the Console, then configure your client protocol. Topping up API credit does not increase subscription quota.

Create and copy your sk- key. Never publish it or commit it to a repository.

2. Pick the right Base URL (by protocol)

3. Put it in your tool

Copy the exact model ID from the subscription model list or pay-as-you-go channels, and check that your client protocol supports it. The model catalogue labels each model’s billing mode.

Verify

curl https://llmapi.pro/v1/messages \
  -H "x-api-key: sk-YOUR_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model":"claude-opus-4-8","max_tokens":64,"messages":[{"role":"user","content":"Hello"}]}'