WebMCP documentation and MCP-B packages

Use upstream WebMCP, Chrome, and OpenAI documentation for platform behavior. Use this site for @mcp-b/* packages, integrations, and compatibility notes.

Read Chrome’s WebMCP docs Browse MCP-B packages

Choose a path

Start with the source that owns your question.

WebMCP platforms and agents

Find the current proposal, implementation documentation, compatibility notes, demos, security guidance, and tools.

Community Group draft
Chrome WebMCP documentation
Codex site tools compatibility
Resources and implementation status
Chrome DevTools WebMCP panel

MCP-B packages

Choose a runtime, add tools to your app, or connect browser tools to other contexts.

Package index
Choose a runtime
Build your first tool
Build your first React tool

Live on this page

Try a registered WebMCP tool.

This page registers get_docs_info through document.modelContext. If site tools are available in ChatGPT’s built-in browser, ask Codex to call it. You can also use another compatible browser agent. Then follow the first tool tutorial to register your own.