---
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: StackBlitz
providerId: stackblitz
created: '2026-06-12'
modified: '2026-06-12'
reconciled: true
tags:
  - Rate Limiting
  - WebContainers
  - Developer Tools
description: StackBlitz limits WebContainer API sessions to 500 per month for commercial plan customers; open source use is free without session caps; enterprise licenses required for production for-profit use beyond included quotas.
sources:
  - https://developer.stackblitz.com/platform/api/webcontainer-api
  - https://webcontainers.io/enterprise
headers:
  retryAfter: Retry-After
responseCodes:
  throttled: 429
limits:
  - name: WebContainer API Sessions (Commercial Plan)
    scope: org
    metric: sessions_per_month
    limit: 500
    timeFrame: month
  - name: WebContainer API Sessions (Open Source / Non-Commercial)
    scope: user
    metric: sessions_per_month
    limit: -1
    timeFrame: month