x-ratelimit-limit-requests: 600
x-ratelimit-remaining-requests: 599
x-ratelimit-reset-requests: 45s
x-ratelimit-tier: tier_1

{
  "error": {
    "message": "Rate limit exceeded. You have made too many requests to the llm API. Please retry after 45 seconds.",
    "type": "rate_limit_error",
    "code": "rate_limit_exceeded"
  },
  "tier": "tier_1",
  "limit": 600,
  "reset_at": "2024-01-15T12:00:45Z"
}

import Casedev from 'casedev';

const client = new Casedev({ apiKey: 'sk_case_...' });

try {
  const response = await client.llm.v1.chat.createCompletion({
    model: 'anthropic/claude-3-5-sonnet-20241022',
    messages: [{ role: 'user', content: 'Hello!' }]
  });
} catch (error) {
  if (error.status === 429) {
    // Wait and retry
    const resetTime = error.headers['x-ratelimit-reset-requests'];
    console.log(`Rate limited. Retry after ${resetTime}`);
  }
}

{
  "error": {
    "message": "Insufficient credit balance. Please add credits to continue using the API.",
    "type": "insufficient_balance",
    "code": "payment_required",
    "balance_cents": 0
  }
}

async function withRetry(fn, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await fn();
    } catch (error) {
      if (error.status === 429 && i < maxRetries - 1) {
        const delay = Math.pow(2, i) * 1000; // 1s, 2s, 4s
        await new Promise(r => setTimeout(r, delay));
        continue;
      }
      throw error;
    }
  }
}

const response = await fetch('https://api.case.dev/llm/v1/chat/completions', {
  method: 'POST',
  headers: { 'Authorization': 'Bearer sk_case_...' },
  body: JSON.stringify({ ... })
});

const remaining = response.headers.get('x-ratelimit-remaining-requests');
if (parseInt(remaining) < 10) {
  console.warn('Approaching rate limit!');
}