Today I spent some time adding OpenRouter support to a Chrome extension that lets you inspect and interact with WebMCP functions on websites that support it.
Web demo exposing 3 tools defined via WebMCP:
https://googlechromelabs.github.io/webmcp-tools/demos/explainer/
Chrome extension for interacting with websites that support WebMCP:
https://github.com/beaufortfrancois/model-context-tool-inspector
(To use it, you’ll need to enter a Gemini API key. My patch adds support for OpenRouter API keys as well.)
My fork of the extension, with OpenRouter support added (branch gemini-openrouter-providers): https://github.com/juananpe/model-context-tool-inspector/tree/codex/gemini-openrouter-providers
I was going to submit it upstream as a PR, but after reading this post, I don’t think it’s worth it: https://github.com/beaufortfrancois/model-context-tool-inspector/pull/5
BTW,
«Site tools are ChatGPT’s implementation of the proposed WebMCP standard. In the built-in browser in the ChatGPT desktop app, ChatGPT Work and Codex can discover and use these tools when they are available» https://learn.chatgpt.com/docs/webmcp