{
 "id": "origin-trial",
 "group": null,
 "part_of": null,
 "name": "Origin trial",
 "aliases": [
  "Chrome origin trial"
 ],
 "definition_md": "An **origin trial** is Chrome's mechanism for shipping an experimental web-platform feature to real sites for a limited time before deciding whether to ship it broadly: a developer registers a specific origin, receives a token, and includes that token as a meta tag or HTTP header so the feature activates for visitors to that origin without requiring them to flip browser flags. Trials are time-limited, usage-limited, and feed feedback back to the Chrome team; some (\"deprecation trials\") instead let a site keep a feature that has been removed elsewhere a little longer. Firefox and Edge run comparable programmes. WebMCP, which lets a page register tools an agent embedded in the browser can call, entered a Chrome 149 origin trial announced 9 June 2026, meaning any exposure to it today is experimental and origin-scoped rather than a shipped, universally available API. Used by: webmcp.",
 "step": "act",
 "related_protocols": [
  "webmcp"
 ],
 "sources": [
  {
   "url": "https://developer.chrome.com/docs/web-platform/origin-trials",
   "date": "2026-09-05",
   "label": "VERIFIED"
  },
  {
   "url": "https://developer.chrome.com/blog/ai-webmcp-origin-trial",
   "date": "2026-06-09",
   "label": "VERIFIED"
  }
 ],
 "url": "https://agenticweb.wiki/terms/origin-trial/",
 "category": "act",
 "type": "term"
}