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WebMCP is a browser feature that lets a web page offer tools to the AI agent built into your browser. When your browser supports it, Reactive Resume offers tools for your documents: the agent can list and open them, read the one you have open, run Check on a resume, and edit it. It works in the tab you already have open, with your own sign-in, and every change shows on the page as it’s made.

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WebMCP or the MCP server

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Before you start

  • A browser with WebMCP. WebMCP is new and still changing. In Chrome, turn it on at chrome://flags/#enable-webmcp-testing and restart the browser. Browsers without it don’t offer the tools; Reactive Resume works as usual there.
  • An agent that uses WebMCP, such as your browser’s built-in assistant or an extension that connects page tools to your AI agent.
  • A Reactive Resume account. The tools appear once you’re signed in.

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Try it

Open a resume in the editor, then ask your browser’s agent in plain language, for example:
  • “Check my resume and fix the date problems.”
  • “Rewrite the summary so it leads with my backend experience.”
  • “Switch the template to Onyx and make the primary color dark blue.”
  • “Open my letter for Acme and address it to Dana Lee.”

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Tools

Tools are offered while the page that runs them is open. An agent on the dashboard sees the document tools; once it opens a resume or letter, that editor’s tools are added.

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Anywhere, once you’re signed in

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In the resume editor

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In the cover letter editor

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How edits work

  • One patch, one step. All of a patch’s operations apply together or not at all, and the page updates at once. A message says the agent edited the resume; Undo in it, or Ctrl/⌘+Z, takes the edit back.
  • Saved like your own typing. Resume edits save automatically. Letter edits are saved before the tool returns; if the letter changed in another tab, the agent is told it wasn’t saved.
  • Checked first. An edit that would leave the resume invalid, or a path that doesn’t exist, changes nothing, and the agent is told what was wrong so it can try again.
  • Locked documents stay locked. The tools refuse to edit a locked resume or letter. Unlock it yourself if you want the agent to continue.

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What the agent can and can’t do

The tools work only in your open tab, only while you’re signed in, and only on your own documents. They can’t delete, trash, share or lock documents, change sharing settings or passwords, or reach your account settings. Text a tool returns from your documents is marked as content to read, not instructions to follow, for agents that support the marking. Anything a tool returns, including your resume’s private notes, goes to the agent and its AI provider, as with any page you ask it to read. Reactive Resume sends nothing to the agent on its own: it answers only the tool calls the agent makes.

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Troubleshooting