Vapi · Rate Limits

Vapi Rate Limits

Vapi documents concurrency limits per account and applies standard 429 throttling on the REST API. Concurrent call limits scale with plan/contract; specific RPS quotas are not publicly documented and should be confirmed with Vapi support.

Vapi Rate Limits is the machine-readable rate-limit profile for Vapi on the APIs.io network, in the API Commons Rate Limits shape.

It captures 2 rate-limit definitions, measuring concurrent_calls and requests.

An exhausted limit returns HTTP 429.

This profile was written by API Evangelist and has not been verified against a page the provider published; treat every limit as unconfirmed until a dated transcription replaces it.

The profile also includes 2 backoff/retry policies defined and response codes documented for throttled.

Tagged areas include AI, Voice, Agents, Realtime, and CPaaS.

2 Limits Exhausted: HTTP 429
Method: generated, dated 2026-05-08.
Written by API Evangelist on 2026-05-08 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
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AIVoiceAgentsRealtimeCPaaSRate LimitingQuotasThrottling

Limits

Concurrent Calls account
concurrent_calls
scales by plan; contact support for higher concurrency
Vapi enforces a per-account concurrent active call cap.
API Requests account
requests
not publicly documented
Standard 429 backoff applies; verify limits with Vapi support before high-volume integrations.

Policies

Backoff Strategy
Clients should implement exponential backoff with jitter and honor any Retry-After header on 429 responses.
Concurrency Planning
Provision concurrent call capacity in advance for outbound campaigns and high-volume inbound use cases.

Sources

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

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Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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Call it yourself

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curl "https://apis.io/api/v1/rate-limits/vapi-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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