Self-hosted permission-aware context layer for agents. MCP + API.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add nacre --env NACRE_SERVICE_KEY='<NACRE_SERVICE_KEY>' -- npx -y @nacre.work/mcp~/.codex/config.toml
[mcp_servers.nacre]
command = "npx"
args = ["-y", "@nacre.work/mcp"]
env = { NACRE_SERVICE_KEY = "<NACRE_SERVICE_KEY>" }
# codex mcp add nacre --env NACRE_SERVICE_KEY='<NACRE_SERVICE_KEY>' -- npx -y @nacre.work/mcp~/.cursor/mcp.json
{
"mcpServers": {
"nacre": {
"command": "npx",
"args": [
"-y",
"@nacre.work/mcp"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"nacre": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@nacre.work/mcp"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"nacre": {
"command": "npx",
"args": [
"-y",
"@nacre.work/mcp"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"nacre": {
"command": "npx",
"args": [
"-y",
"@nacre.work/mcp"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"nacre": {
"command": "npx",
"args": [
"-y",
"@nacre.work/mcp"
],
"env": {
"NACRE_SERVICE_KEY": "<NACRE_SERVICE_KEY>"
}
}
}
}Environment variables
NACRE_SERVICE_KEY
Replace the placeholders with your own credentials and keep them out of version control.