Arcaeon
A record of what an agent did that the agent cannot quietly rewrite, and a way for anyone to check.
MCP server · by arcaeon.io
About
Arcaeon is an MCP server published by arcaeon.io. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs on your machine
- Secrets: 1
- Settings: 1
Requires: ARCAEON_KEY (secret)
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Package
PyPI arcaeon (arcaeon on PyPI)
- Latest version on PyPI: 0.10.0, published 2026-10-05
No known vulnerabilities in OSV for 0.9.0 (checked 2026-10-13)
PyPI facts come from pypi.org, PyPI downloads from pypistats.org. Each figure is the registry's own and is never added to another. A registry that publishes no figure shows none: no number is not zero. Vulnerability records come from OSV.dev (CC BY 4.0) and concern the declared version only; a listing that declares no version gets no answer. We do not scan code.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a local MCP server: PyPI package
Built from what Official MCP Registry declares.
claude mcp add --env "ARCAEON_KEY=<YOUR_ARCAEON_KEY>" --transport stdio arcaeon -- uvx --with "mcp>=2.0.0,<3" arcaeon mcp[mcp_servers.arcaeon]
command = "uvx"
args = ["--with", "mcp>=2.0.0,<3", "arcaeon", "mcp"]
[mcp_servers.arcaeon.env]
ARCAEON_KEY = "<YOUR_ARCAEON_KEY>"{
"mcpServers": {
"arcaeon": {
"command": "uvx",
"args": [
"--with",
"mcp>=2.0.0,<3",
"arcaeon",
"mcp"
],
"env": {
"ARCAEON_KEY": "<YOUR_ARCAEON_KEY>"
}
}
}
}Replace the values in angle brackets with your own. We show the names of the settings, never values.
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 0.9.0 | Forks (GitHub): 0 Stars (GitHub): 1 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
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Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
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Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.