MCP App Store
by KeenEthics

Overview

Omniseal by PureCipher conceals a secret file inside a supported cover file, retrieves the hidden file with the matching private seed, checks seal integrity, and creates a clean cover with the hidden payload removed. Each operation preserves the original files. Provide an authorized, fetchable HTTPS file URL or exact base64 bytes. Files uploaded to a Claude conversation are not automatically accessible to this connector. Selected file contents and the operation seed are processed by PureCipher’s hosted Omniseal service. No PureCipher account or API key is required. Inputs are limited to 6 MB per file and 10 MB combined for sealing. Claude responses are limited to 140,000 serialized characters, typically restricting generated files to about 100 KB. Results are binary MCP resources; the connector does not provide hosted output download links. Larger outputs return a clear size error. Omniseal is not a password-recovery service or general-purpose encryption tool. Use an Omniseal private seed, never an account password or API credential.

Tools

remove_hidden_file

ChatGPT
Use this when the user wants a new clean cover file with the concealed Omniseal payload removed. Xomniseal processes the file in this service and never overwrites the original.

retrieve_secret_file

ChatGPT
Use this when the user wants to extract the hidden file from an attached Omniseal sealed file using its private seed. Xomniseal processes the file in this service and does not modify the original.

seal_files

ChatGPT
Use this when the user wants to conceal one generated or attached secret file inside one generated or attached cover file. PNG, PDF, DOCX, and XLSX artifacts are supported, and the secret may be any supported file type. Xomniseal returns a new sealed file without overwriting either original.

verify_sealed_file

ChatGPT
Use this when the user wants to check whether an attached Omniseal sealed file and its concealed content show signs of tampering. Xomniseal processes the file in this service and does not modify it.

remove_hidden_file

Claude
Return a new clean cover with the hidden payload removed; preserve the original sealed file. File results are binary MCP resources; this connector rejects results exceeding its 140,000-character limit. Inputs require actual file bytes or reachable URLs.

retrieve_secret_file

Claude
Recover the exact hidden file from an Omniseal sealed file using its private seed. File results are binary MCP resources; this connector rejects results exceeding its 140,000-character limit. Inputs require actual file bytes or reachable URLs.

seal_files

Claude
Conceal a secret file inside a cover file, returning a new sealed file without overwriting originals. File results are binary MCP resources; this connector rejects results exceeding its 140,000-character limit. Inputs require actual file bytes or reachable URLs.

verify_sealed_file

Claude
Check whether an Omniseal sealed file shows signs of tampering. File results are binary MCP resources; this connector rejects results exceeding its 140,000-character limit. Inputs require actual file bytes or reachable URLs.

Capabilities

WritesInteractive

Example Prompts

Click any prompt to copy it.

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