Omniseal MCP server
online · 100% uptimeio.github.PureCipher/omniseal·v1.0.0Conceal, retrieve, verify, and remove hidden files with PureCipher Omniseal.
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If you have run it, two minutes of your experience saves the next person an afternoon.
Omniseal tools (4, 1 write)
write = sends, deletes, buys or postsremove_hidden_filewrite actionFreeReturn 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_fileFreeRecover 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_filesFreeConceal 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_fileFreeCheck 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.
Public scan report
scanner v0.1.10 · 2026-10-13 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 481ms20/20
- Tool poisoning4 tool descriptions checked15/15
- Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
- Maintenancelast push 4 days ago15/15
- Maintainer identityregistry namespace matches repository owner; GitHub account older than a year9/10
Findings (1)
- highWrite-action tools reachable without authentication
auth.open-write
How Omniseal compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 83/100
- higher than 65% of 48,255 servers
- Tools
- 4
- the typical server has 7
- Tools that change things
- 25%
- typical: 0%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote server answers 100%
- Response time
- 401 ms
- faster than 37% of 30,031 servers
What its tools let an agent do: 3 read · 1 delete
Install Omniseal in Claude Code, Cursor or VS Code
claude mcp add --transport http omniseal https://api.purecipher.com/mcp?platform=claude
What the publisher says
From the Omniseal repository's README, as published. We do not edit it. Read it on GitHub
Omniseal MCP service
Seal, retrieve, verify, and remove hidden files using PureCipher Omniseal.
Connect
Remote Streamable HTTP endpoint:
https://api.purecipher.com/mcp?platform=claudeNo 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.
- retrievesecretfile: recover the hidden file using its private seed.
- verifysealedfile: check seal integrity, without a seed.
- removehiddenfile: 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 filename and exactly one of downloadurl (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
- Omniseal
- Privacy policy
- Terms
- Email: support@purecipher.com
Copyright 2026 PureCipher. All rights reserved.
Nothing above is checked by us. What we check is on the safety report.
Omniseal: common questions
- Is Omniseal MCP server safe?
- Mostly: it is graded B (83/100). Read the Omniseal safety report
- How do I install Omniseal?
- It runs remotely at api.purecipher.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does Omniseal need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is Omniseal maintained?
- The last commit was 25 days ago (2026-10-09). The latest release is v1.0.0.
- Is Omniseal up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- How does Omniseal compare with other MCP servers?
- safety score 83/100 (higher than 65% of 48,255 servers); tools 4 (the typical server has 7); tools that change things 25% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.