Self-hosted permission-aware context layer. Search returns only what the caller may read.
Connect Runs on your machine
claude mcp add nacre -e NACRE_SERVICE_KEY=<NACRE_SERVICE_KEY> -- npx -y @nacre.work/[email protected]{
"mcpServers": {
"nacre": {
"command": "npx",
"args": [
"-y",
"@nacre.work/[email protected]"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}{
"mcpServers": {
"nacre": {
"command": "npx",
"args": [
"-y",
"@nacre.work/[email protected]"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}{
"servers": {
"nacre": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@nacre.work/[email protected]"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_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 |
|---|---|
NACRE_SERVICE_KEYRequired, secret | Service-account key for STDIO mode. The server also needs the deployment's full environment (database and backend configuration) - see docs/mcp.md; the key alone is not enough to start it. |
Details
| Package | @nacre.work/[email protected] (NPM, stdio) |
| First published | 25 Oct 2026 |
| Last updated | 25 Oct 2026 |
| Registry name | work.nacre/nacre |
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