Hi there! 👋
I can see you're encountering a "Rate limit exceeded" error with status code 429. While I don't have specific details about your particular usage patterns, I can definitely explain what this error means and how you might resolve it.
The status code 429 with the message "Rate limit exceeded" indicates that you've surpassed the allowed number of requests within a specific timeframe. According to the [VAPI documentation](
https://docs.vapi.ai/billing/billing-limits), this could be happening for several reasons:
## Common Causes:
1. **Concurrency Limits**: You may have exceeded your account's concurrent call limit (default is 10 simultaneous calls). As mentioned in the [VAPI documentation](
https://docs.vapi.ai/billing/billing-limits), "Exceeding your concurrency limit causes new requests to queue or be rejected until existing calls finish."
2. **Model-Specific Rate Limits**: You might have reached the rate limit for a specific AI model on your service tier.
3. **Cloudflare Bot Protection**: According to [VAPI support discussions](
https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1340011084769263727), VAPI uses Cloudflare for bot protection, which might block IPs considered bots.
## Solutions:
1. **Wait for the Rate Limit to Reset**: The simplest solution is to wait for your rate limit to reset.
2. **Optimize Your API Usage**: Try introducing delays between API calls. For example, space out calls so you're making one call every 2 seconds.
3. **Check for Stuck Calls**: Look for any calls that might be stuck in "In Progress" status, as these count against your concurrency limit.
4. **Implement Error Handling**: Add code to catch these errors and retry after a suitable delay.
5. **Upgrade Your Service Tier**: If you consistently hit these limits, consider [purchasing additional concurrent lines](
https://docs.vapi.ai/billing/billing-limits) through the dashboard.