Nonce

Nonce is an AI security proxy that sits between AI apps and data sources to grant time-limited data access passes.

Nonce is a security proxy that sits between AI applications like ChatGPT, Claude, and Cursor, and your data sources such as Gmail, Google Calendar, Google Drive, and Slack. When an AI app asks for data, nonce turns your question into a strict filter so the app can only see what the question requires, and the access pass expires automatically on its own. It handles sensitive requests involving money, health, passwords, or suspicious behavior by sending a notification to your phone for approval. You can choose different modes to control access duration and permission rules. It connects to AI apps using MCP connectors or custom connectors and supports Google sign-in.

Nonce at a glance

Best for: Software engineer, Product manager
Runs on: Web
Pricing: Freemium
Released: November 2026
Category: AI agent tool
Website: anonce.io

Key features

Grants time-limited access passes for AI questions
Filters searches to match specific question scopes
Sends alerts to your phone for sensitive requests
Blocks off-topic searches and bulk data collection
Connects with Gmail, Google Calendar, Drive, and Slack
Supports MCP connectors for AI applications
Offers customizable security modes for different apps

Use it for

Allowing ChatGPT to read specific tax emails and files
Restricting Claude to flight confirmation emails only
Approving or denying data access requests on your phone
Preventing AI apps from scraping your entire inbox

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