Frontend UI is dead - welcome Voice User Interface (VUI) AI Agent
This post isn’t about how you can generate a Photoshop design with prompts, or how Figma can generate code — or even spin up a full Wix site from a single prompt.
Frontend UI, quite literally, is becoming mostly unnecessary. Only a small fraction of specialized UIs for professionals will remain.
Any tasks you can delegate to a human assistant will be delegated to a Voice-controlled AI Agent.
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And most importantly, this is already possible today:
- Keep your current backend API.
- Add an GraphQL or REST MCP server.
- Use Claude Desktop MCP or VS Code Voice for testing.
- Connect Vapi.ai, Claude.ai and ChatGPT soon.
- Done.
The end user gets voice control over your service using your existing backend API.
Predictions
- New SaaS products will be frontless — only backends with MCP connectors, like Zapier MCP. UI Frontend will be generated only as a fallback.
- All existing SaaS APIs will add an MCP layer on top of their current backends.
PS: The Siri 2.0 plan is to use AI control over the existing UI. MCP includes more metadata you can provide, such as common prompts.
PPS: Currently, MCP is used primarily by developers, such as in Cursor or Copilot. The natural next step is enabling end users to interact with APIs through MCP and voice control.
This post on Hacker News and Linkedin.