Omniseal MCP service

MCP serverFiles & storage

Lets your agent hide files inside other files, then retrieve, verify, or remove them.

No key or account is asked for. Not verified by us yet: Ahel has not run a call through it.

Connect your AI Use it in a pipeline

Then ask your AI: use the seal files tool from Omniseal MCP service

Details

Available today. Use it as a step in a pipeline you build, or from your connected AI.

No key or account is asked for. Not verified by us yet: Ahel has not run a call through it.

Add it as a step in a pipeline you build on Ahel, or connect Ahel to Claude, ChatGPT, Cursor, Claude Code or Codex and ask your AI to use it.

About this server

Conceal, retrieve, verify, and remove hidden files with PureCipher Omniseal.

Install Omniseal MCP service

The server’s own address, for the clients that take one directly. Or connect Ahel once and every client you use reads it from one address, with the account kept on Ahel rather than in each client’s config.

Claude Code
claude mcp add --transport http --scope user omniseal-mcp-service 'https://api.purecipher.com/mcp?platform=claude'
Run it once in your project, then open /mcp to approve any sign-in the server asks for.
Claude Desktop
https://api.purecipher.com/mcp?platform=claude
Add a custom connector in Settings, paste this address, and approve the sign-in.
Cursor
cursor://anysphere.cursor-deeplink/mcp/install?name=omniseal-mcp-service&config=eyJ1cmwiOiJodHRwczovL2FwaS5wdXJlY2lwaGVyLmNvbS9tY3A/cGxhdGZvcm09Y2xhdWRlIn0=
Open the link and Cursor adds the server at that address.
ChatGPT
https://api.purecipher.com/mcp?platform=claude
In Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.
Codex
codex mcp add omniseal-mcp-service --url 'https://api.purecipher.com/mcp?platform=claude'
Run it once, then sign in with codex mcp login omniseal-mcp-service if the server asks for an account.

From the project's README

As published by purecipher/omniseal-mcp in README.md.

Seal, retrieve, verify, and remove hidden files using PureCipher Omniseal.

Connect

Remote Streamable HTTP endpoint:

https://api.purecipher.com/mcp?platform=claude

No account, OAuth, or API key is required for the current public endpoint. For Cline setup, see llms-install.md. Other MCP clients can use the same endpoint with their HTTP transport configuration.

Tools

seal_files: conceal a secret file inside a supported cover.
retrieve_secret_file: recover the hidden file using its private seed.
verify_sealed_file: check seal integrity, without a seed.
remove_hidden_file: create a new clean cover using the private seed.

Original input files are preserved. This repository contains the MCP connection documentation configuration and instructions. The hosted service executes the Omniseal SDK.

Inputs and output limits

Each file argument contains file_name and exactly one of download_url (a service-reachable HTTPS URL) or content_base64 (exact file bytes). Local paths and chat attachments are not automatically uploaded.

Selected file contents and the operation seed are processed by PureCipher's hosted service. Use an Omniseal seed, never an account password or API credential. Inputs are limited to 6 MB per file and 10 MB combined for sealing. Responses are limited to 140,000 serialized characters, typically about 100 KB of output bytes. Outputs are binary MCP resources, not hosted download links. Client-side binary rendering and saving have not yet been verified end to end.

The service URL is https://api.purecipher.com/mcp?platform=claude. The query selects the existing compatible file schema; it does not send files to Anthropic. The service is publicly reachable and requires no authentication.

Validation

Validated with Gemini CLI 0.63.0: installation and MCP connection succeeded. All four live MCP operations passed synthetic PNG/PDF tests, including exact recovery of the secret bytes. Model-mediated execution remains unverified.

Support

Tools it offers (4)

What this server listed when Ahel dialed its public endpoint in Oct 2026, with no key and no account of yours. The names are the server’s own.

seal_files
retrieve_secret_file
verify_sealed_file
remove_hidden_file

Signals

Last commit: Oct 2026

Advanced

Delivery: omniseal MCP server → your Ahel connector (mcp.ahel.ai) → your AI.
Item type: mcp-server
Key: io-github-purecipher-omniseal
Source: github.com/purecipher/omniseal-mcp
Hosted endpoint: https://api.purecipher.com/mcp?platform=claude

github.com/purecipher/omniseal-mcp

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