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HiddenContent.ai
HiddenContent.ai is a document security tool that screens files for hidden instructions before AI assistants process them.
HiddenContent.ai checks documents for hidden content, white text, tiny fonts, and tracked changes before an AI assistant acts on them. It protects users from concealed instructions by analyzing the actual file rather than plain text. Users sign up with GitHub to receive a production key and 20 free pages. The service integrates with Claude and ChatGPT through MCP connectors or runs via an API and local server. Credit is prepaid per page with no subscriptions or recurring invoices.
HiddenContent.ai at a glance
- Best for: Software engineer
- Runs on: Web, API
- Pricing: Free plan with 20 pages; prepaid credits at one cent per page with a $10 minimum and $5,000 maximum per purchase.
- Released: October 2026
- Category: AI agent tool
- Website: hiddencontent.ai
Key features
- Screens documents for hidden instructions
- Analyzes real files including white text and tiny fonts
- Integrates with Claude and ChatGPT
- Provides API access for custom code pipelines
- Supports local server execution via STDIO
- Issues signed certificates for document analysis
- Offers prepaid credit with automatic refill options
Use it for
- Screening documents before sharing with an AI assistant
- Checking files for concealed instructions in code pipelines
- Analyzing documents for white text, tiny fonts, and tracked changes
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