Arcaeon MCP Server
by arcaeon-ioio.arcaeon/arcaeonv0.9.0
A record of what an agent did that the agent cannot quietly rewrite, and a way for anyone to check.
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Active9d ago
Install Arcaeon MCP server
Install in Claude Code
claude mcp add arcaeon -e ARCAEON_KEY='<arcaeon-key>' -- uvx arcaeon mcpInstall in Cursor
{
"mcpServers": {
"arcaeon": {
"command": "uvx",
"args": [
"arcaeon",
"mcp"
],
"env": {
"ARCAEON_KEY": "<arcaeon-key>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"arcaeon": {
"command": "uvx",
"args": [
"arcaeon",
"mcp"
],
"env": {
"ARCAEON_KEY": "<arcaeon-key>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"arcaeon": {
"type": "stdio",
"command": "uvx",
"args": [
"arcaeon",
"mcp"
],
"env": {
"ARCAEON_KEY": "<arcaeon-key>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"arcaeon": {
"command": "uvx",
"args": [
"arcaeon",
"mcp"
],
"env": {
"ARCAEON_KEY": "<arcaeon-key>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| ARCAEON_KEY | — | yes | Witness API key for the two paid tools (witness_pin, witness_renew). Free tools work without it. |
Freshness
Active — last maintenance signal 9d ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-09-30 · 9d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-09-25 · 14d ago · official registry · v0.9.0
FAQ
›How do I install the Arcaeon MCP server in Claude Code?
Run: claude mcp add arcaeon -e ARCAEON_KEY='<arcaeon-key>' -- uvx arcaeon mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Arcaeon require an API key?
Yes. It expects ARCAEON_KEY, of which 1 is a secret.
›Can I use Arcaeon as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Arcaeon in the official MCP registry?
Yes, as io.arcaeon/arcaeon.