Since the end of August, ChatGPT (Codex or Work) has supported WebMCP by default. Finally, the work we did six months ago integrating WebMCP into LiipGPT is paying off. And it's no longer just an obscure feature flag in Chrome that enables people to use it.

No more adding MCP servers manually to ChatGPT, just give it a hint where to look (I assume with a more obvious or well-known domain, it would figure that out by itself). Maybe not "no more," but hopefully less setup and more discovery. Authentication is also usually solved with WebMCP in the way users are used to: it runs in a browser session, where you might need to log in to a site first. No more OAuth workflows that are obscure to the casual user.

Example Question:

When is the next cardboard collection at Quellenstrasse? Check zuericitygpt.ch

Answer in ChatGPT:

The next cardboard collection on Quellenstrasse (8005) is Wednesday, 9 September 2026. (ZĂŒriCityGPT)

And it didn't just hallucinate it, or somehow find it otherwise, it actually called the MCP tool get_waste_collection.

It also works for follow up questions for a different place or even to check out a City Council resolution (Stadtratsbeschluss), because ZĂŒriCityGPT has maybe the best approach to search for them (and everything else on the City of Zurich website, but that a normal WebSearch usually also figures out).

And because I like the approach a lot, I also added WebMCP to our instance of the City of Zurich Open Data MCP Server at https://zurich-opendata-mcp.liipgpt.ch/

From the example question in their GitHub repo:

How many free parking spots are in Zurich right now, and what's the air quality like? Check on https://zurich-opendata-mcp.liipgpt.ch/

Answer in ChatGPT:

The service reports 6,862 free spaces across 36 parking facilities, but that figure is not genuinely current: its timestamp is 18 July 2026, 05:27, and several capacity figures are internally inconsistent. So there’s no trustworthy “right now” parking total from this feed.
Air quality is generally good, based on provisional hourly readings from 4 September 2026, 06:00:

  • PM2.5: 4.2–7.0 ”g/mÂł
  • PM10: 8.1–16.6 ”g/mÂł
  • Ozone: 7.9–73.7 ”g/mÂł
  • NO₂: 4.9–49.4 ”g/mÂł — highest near Schimmelstrasse and Rosengartenstrasse

In short: low particulate pollution, with moderately elevated traffic-related NO₂ at central roadside stations. Source: ZĂŒrich Open Data MCP.

These examples are not groundbreaking, even if asking for "recycling collection times" is always a beloved topic on our public chatbots and Google also doesn't know them by heart. But if websites start adding more useful WebMCP endpoints to their websites, beyond just searching their content, it will enhance the experience for people using ChatGPT et al. Like adding items to a shopping cart or sending a report about a broken street sign or just help filling out a webform without actually sending it. Without them even knowing what WebMCP or MCP is or registering anything explicitly.

Very much looking forward to future use cases for WebMCP and how it will improve the experience with tools like ChatGPT (and others, when they implement it)

See also OpenAI's documentation about WebMCP for more about their implementation.