MCP proxy: holds risky tool calls for passkey approval; signed receipts you can check offline.
Connect Runs on your machine
claude mcp add witness -e DEUS_WITNESS_KEY=<DEUS_WITNESS_KEY> -e DEUS_WITNESS_URL=<DEUS_WITNESS_URL> -- uvx deus-witness==0.2.70
{
"mcpServers": {
"witness": {
"command": "uvx",
"args": [
"deus-witness==0.2.70"
],
"env": {
"DEUS_WITNESS_KEY": "<DEUS_WITNESS_KEY>",
"DEUS_WITNESS_URL": "<DEUS_WITNESS_URL>"
}
}
}
}
{
"mcpServers": {
"witness": {
"command": "uvx",
"args": [
"deus-witness==0.2.70"
],
"env": {
"DEUS_WITNESS_KEY": "<DEUS_WITNESS_KEY>",
"DEUS_WITNESS_URL": "<DEUS_WITNESS_URL>"
}
}
}
}
{
"servers": {
"witness": {
"type": "stdio",
"command": "uvx",
"args": [
"deus-witness==0.2.70"
],
"env": {
"DEUS_WITNESS_KEY": "<DEUS_WITNESS_KEY>",
"DEUS_WITNESS_URL": "<DEUS_WITNESS_URL>"
}
}
}
}
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 |
|---|---|
DEUS_WITNESS_KEYRequired, secret | Agent key (dwk_...) created in your Deus Witness account. |
DEUS_WITNESS_URLOptional | Witness service URL. |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 13 Nov 2026 |
| Last updated | 13 Nov 2026 |
| Registry name | io.github.sipkigroup/witness |
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