generated: '2026-09-14'
method: searched
source: >-
  https://playground.nileslabs.com/llms-full.txt (Session Sandbox, Network
  Simulation, Code Integration Recipes) and /product.json, fetched 2026-09-14.
api: Playground REST API
summary: >-
  The entire product IS a sandbox — there is no separate test-vs-live split
  because no data is ever real. Every caller gets a private, disposable mutation
  overlay over a shared immutable baseline dataset.
modes:
  - name: session-overlay
    default: true
    detail: >-
      All writes land in a per-session overlay; the global seed data stays
      pristine so parallel testers never collide.
session_identity:
  browser: credentials:'include' / withCredentials:true (session cookie)
  non_browser_header: X-Playground-Identity
  detail: >-
    Pass a stable X-Playground-Identity value from Node/Playwright/cURL to bind
    all mutations to one private overlay (ideal for parallel E2E runners).
test_controls:
  network_simulation:
    latency: '?_delay=<1-5000ms> or X-Simulate-Delay header'
    status: '?_status=<400-599> or X-Simulate-Status header'
    rate_limit: '?_ratelimit=true or X-Simulate-RateLimit header (429 + Retry-After)'
  seed_templates:
    endpoint: POST /api/v1/custom/seed
    templates: [ecommerce, saas, blog, crm]
  simulated_auth:
    detail: Any username/password to /auth/login yields working Bearer JWTs (expires_in 900s).
session_management:
  export: GET /api/v1/session/export (a.k.a. /session/snapshot) -> portable JSON
  import: POST /api/v1/session/import (a.k.a. /session/snapshot) <- restore JSON
  reset: DELETE /api/v1/session/reset (purge overlay, return to baseline)
  retention_days: 10
  max_overlay_records_per_resource: 30
note: >-
  No fixture credentials or test cards are invented here — none exist because the
  provider issues no real keys. All values above are published verbatim by the
  provider.