Hello, We are planning a significant increase in the number of requests to your API and would like to clarify a few points: • What are the current request rate limits (per second / per minute / per day)? • Is it possible to increase the quota or switch to a paid plan if higher limits are required?

To increase your API request limits and access higher concurrency: 1. Upgrade to a Vapi Enterprise Plan, which includes unlimited concurrency and higher rate limits. 2. Go to the [Vapi Dashboard](https://dashboard.vapi.ai/settings/billing), navigate to Settings → Billing, and adjust your reserved concurrency or purchase add-ons as needed. This upgrade provides reserved capacity, technical support, and advanced features for scaling your application ([see details](https://docs.vapi.ai/enterprise/plans)). Source: - [Vapi Enterprise Plans](https://docs.vapi.ai/enterprise/plans)

Thank you for your response. We would like to clarify one additional point. In our case, we are encountering not only Vapi API limits, but also Cloudflare rate limiting / DDoS protection on your side. At the same time, we have observed that when additional lines (concurrency) are purchased, the allowed request volume appears to increase proportionally. Our question is: • Can API request limits and Cloudflare protection thresholds be scaled proportionally simply by purchasing additional lines or reserved concurrency, without switching to a different (Enterprise) plan? • Is there a recommended configuration to avoid Cloudflare blocks while staying on the current plan? At this moment, we do not require a different tariff plan — only predictable scaling of request limits aligned with purchased capacity. Thank you for your clarification.

Hi Roman, - Purchasing additional reserved concurrency (call lines) increases your allowed simultaneous calls, but it does not automatically bypass Cloudflare rate-limits or DDoS protections. Concurrency controls call slots on Vapi’s side; Cloudflare protection and API request rate limits are separate layers. - Native auto-scaling of Cloudflare thresholds or per-request API rate limits is not available on the self-serve plan. To get higher API rate limits and relaxed protection settings (and enterprise-grade capacity), you must move to an Enterprise plan — see https://docs.vapi.ai/enterprise/plans. - Recommended approach to avoid Cloudflare blocks while staying on the current plan: 1. Buy the necessary Reserved Concurrency lines in the Dashboard: https://dashboard.vapi.ai/settings/billing (this prevents Vapi-side concurrency blocks). 2. Throttle and batch outbound requests from your side (e.g., smaller batches, paced retries) so request rates hitting Vapi/Cloudflare stay steady rather than spiky. 3. Use exponential backoff on 429s and monitor the

subscriptionLimits

fields returned by

POST /call

to detect approaching capacity (see https://docs.vapi.ai/calls/call-concurrency). 4. If Cloudflare blocks persist, provide timestamps and example request IDs so we can investigate specific incidents. - If you need predictable, higher per-second API throughput and control over protection rules, the path is Enterprise — that plan includes higher rate limits and dedicated support to tune protections: https://docs.vapi.ai/enterprise/plans.