A record of what an agent did that the agent cannot quietly rewrite, and a way for anyone to check.
Connect Runs on your machine
claude mcp add arcaeon -e ARCAEON_KEY=<ARCAEON_KEY> -- uvx arcaeon==0.10.0
{
"mcpServers": {
"arcaeon": {
"command": "uvx",
"args": [
"arcaeon==0.10.0"
],
"env": {
"ARCAEON_KEY": "<ARCAEON_KEY>"
}
}
}
}
{
"mcpServers": {
"arcaeon": {
"command": "uvx",
"args": [
"arcaeon==0.10.0"
],
"env": {
"ARCAEON_KEY": "<ARCAEON_KEY>"
}
}
}
}
{
"servers": {
"arcaeon": {
"type": "stdio",
"command": "uvx",
"args": [
"arcaeon==0.10.0"
],
"env": {
"ARCAEON_KEY": "<ARCAEON_KEY>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
ARCAEON_KEYOptional, secret | Witness API key for the two paid tools (witness_pin, witness_renew). Free tools work without it. |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 11 Nov 2026 |
| Last updated | 11 Nov 2026 |
| Registry name | io.arcaeon/arcaeon |
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