specification: API Commons Rate Limits
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/RateLimits
provider: CVAT
providerId: cvat
created: '2026-06-21'
modified: '2026-06-21'
reconciled: false
tags:
- Computer Vision
- Data Annotation
- Labeling
- Datasets
- Open Source
- Rate Limiting
- Quotas
- Throttling
description: >-
  Self-hosted CVAT does not impose vendor rate limits; throughput is bounded by
  the operator's own deployment, worker pool, and any reverse-proxy throttling
  the operator configures. CVAT Online (app.cvat.ai) enforces plan-based quotas
  rather than classic per-minute request limits - caps on projects, tasks,
  internal storage, cloud connections, and monthly AI (auto-annotation) calls -
  and may apply request throttling and abuse protection at the edge. Heavy
  operations (data upload, annotation import/export, dataset export) run as
  asynchronous background jobs that are polled via the requests endpoint rather
  than blocking the caller.
notes: >-
  CVAT does not publish fixed numeric API rate limits. On CVAT Online the
  binding constraints are the plan quotas in plans/cvat-plans-pricing.yml.
  Verify any edge throttling and AI-call ceilings against the current pricing
  page and account console during reconciliation.
sources:
- https://www.cvat.ai/pricing/cloud
- https://docs.cvat.ai/docs/api_sdk/api/
- https://docs.cvat.ai/docs/administration/basics/rest_api_guide/
responseCodes:
  throttled: 429
limits:
- name: Projects (CVAT Online)
  scope: account
  metric: projects
  limit: see plan quota
  notes: Capped per hosted plan; unlimited on self-hosted Community.
- name: Tasks (CVAT Online)
  scope: account
  metric: tasks
  limit: see plan quota
  notes: Capped per hosted plan; unlimited on self-hosted Community.
- name: Internal Storage (CVAT Online)
  scope: account
  metric: storage_gb
  limit: see plan quota
  notes: GB of internal storage allowed per hosted plan.
- name: Cloud Connections (CVAT Online)
  scope: account
  metric: cloud_connections
  limit: see plan quota
  notes: Number of registered cloud-storage connections per hosted plan.
- name: AI / Auto-Annotation Calls (CVAT Online)
  scope: account
  metric: ai_calls
  limit: see plan quota
  notes: Monthly automatic-annotation call allowance per hosted plan.
- name: Edge Request Throttling (CVAT Online)
  scope: account
  metric: requests
  limit: see provider documentation
  notes: Abuse-protection throttling may apply; not published as a fixed RPM/RPS.
policies:
- name: Plan-Based Quotas
  description: On CVAT Online the operative limits are plan quotas (projects, tasks, storage, cloud connections, AI calls), not per-minute request rates.
- name: Asynchronous Background Jobs
  description: Data upload and annotation/dataset import/export run as background processes; poll GET /api/requests/{rq_id} for completion instead of long-blocking requests.
- name: Self-Hosted Has No Vendor Limits
  description: Community (MIT, self-hosted) imposes no vendor rate limits; capacity is governed by the operator's infrastructure and any proxy throttling they add.
- name: Backoff Strategy
  description: Clients should implement exponential backoff with jitter and honor Retry-After on 429 responses.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com