generated: '2026-09-14'
method: searched
source: >-
  https://playground.nileslabs.com/llms-full.txt (Network Simulation
  Capabilities) and /llms.txt, fetched 2026-09-14.
api: Playground REST API
limit_count: 0
enforced_limits: false
limits: []
simulated:
  description: >-
    Playground enforces no real rate limits (it is a free mock sandbox). It
    instead lets clients SIMULATE a 429 on demand to test their retry/backoff
    handling.
  trigger:
    query: _ratelimit=true
    header: 'X-Simulate-RateLimit: true'
  response:
    status: 429
    headers:
      - Retry-After
capacity_notes:
  - Page size capped at limit=200 for list endpoints.
  - Session overlay capped at 30 created records per resource.
  - Session overlays auto-expire after 10 days of inactivity.
note: >-
  limit_count is an honest 0: no per-key/per-account/per-endpoint throttle is
  documented or observed. The only rate-limit behavior is the opt-in simulation,
  which emits a real 429 + Retry-After for testing purposes.