generated: '2026-08-05'
method: searched
source: https://creators.vrchat.com/worlds/clientsim/
summary: 'VRChat has no test-vs-live API mode, no sandbox credentials, and no test
  key prefixes — its web API has a single production environment and is undocumented.
  The sandbox surface it does publish is for CREATORS: a first-party in-editor client
  simulator, a local Build & Test loop that runs your world or avatar in the real
  VRChat client without publishing it, and a staged public-release gate (Community
  Labs) before a world reaches the main search.'
api_sandbox:
  available: false
  test_mode: false
  test_credentials: false
  note: There is one live API host, api.vrchat.cloud. No sandbox host, no test account
    provisioning, no magic test identifiers are published.
environments:
- name: ClientSim
  kind: local simulator
  description: First-party Unity editor play-mode simulator for VRChat worlds. Runs
    Udon and UdonSharp behaviours, simulates player interaction, remote players and
    world lifecycle events inside the editor without connecting to VRChat.
  docs: https://creators.vrchat.com/worlds/clientsim/
  source: https://github.com/vrchat-community/ClientSim
  ships_with: com.vrchat.worlds
  official: true
- name: Build & Test
  kind: local client build
  description: Builds the current world or avatar and launches it in the local VRChat
    client for a private test session, without uploading it or making it visible to
    other users. The standard pre-publish loop for both worlds and avatars.
  docs: https://creators.vrchat.com/sdk/
  official: true
- name: Community Labs
  kind: staged public release
  description: A gated public staging area new worlds pass through before entering
    the main VRChat world search, letting creators collect real traffic and feedback
    ahead of full release.
  docs: https://docs.vrchat.com/docs/vrchat-community-labs
  official: true
- name: Open Beta
  kind: pre-release client channel
  description: A public beta branch of the VRChat client, released ahead of each Live
    build, used to test upcoming platform changes against existing content.
  docs: https://docs.vrchat.com/docs/recent-releases
  official: true
osc_testing:
  description: OSC is tested locally against a running VRChat client — inbound UDP
    9000, outbound UDP 9001 — with OSCQuery used to discover the live parameter tree.
    VRChat publishes debugging guidance and recommends third-party OSC monitors.
  docs: https://docs.vrchat.com/docs/osc-debugging
test_values: []
test_values_note: VRChat publishes no test cards, test accounts, magic identifiers,
  fixtures, or time-simulation tooling. Nothing is invented here.
x-evidence:
- url: https://creators.vrchat.com/worlds/clientsim/
  http_status: 200
  fetched: '2026-08-05'
- url: https://docs.vrchat.com/docs/vrchat-community-labs
  http_status: 200
  fetched: '2026-08-05'
- url: https://docs.vrchat.com/docs/osc-debugging
  http_status: 200
  fetched: '2026-08-05'