Public IP signals (cloud hosting, Tor exits) and Maskbreak API status for fraud checks.
Connect Runs on your machine
claude mcp add mcp -e MASKBREAK_API_KEY=<MASKBREAK_API_KEY> -e SENTINEL_BASE_URL=<SENTINEL_BASE_URL> -- npx -y @sentinelsup/[email protected]
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@sentinelsup/[email protected]"
],
"env": {
"MASKBREAK_API_KEY": "<MASKBREAK_API_KEY>",
"SENTINEL_BASE_URL": "<SENTINEL_BASE_URL>"
}
}
}
}
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@sentinelsup/[email protected]"
],
"env": {
"MASKBREAK_API_KEY": "<MASKBREAK_API_KEY>",
"SENTINEL_BASE_URL": "<SENTINEL_BASE_URL>"
}
}
}
}
{
"servers": {
"mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@sentinelsup/[email protected]"
],
"env": {
"MASKBREAK_API_KEY": "<MASKBREAK_API_KEY>",
"SENTINEL_BASE_URL": "<SENTINEL_BASE_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 |
|---|---|
MASKBREAK_API_KEYOptional, secret | Maskbreak API key for your plan's lookup allowance (100,000 a month on the Free plan). Without it, lookups use the rate-limited keyless endpoint. The older SENTINEL_API_KEY name is still read. |
SENTINEL_BASE_URLOptional | API base URL override, for testing. |
Details
| Package | @sentinelsup/[email protected] (NPM, stdio) |
| First published | 17 Oct 2026 |
| Last updated | 17 Oct 2026 |
| Registry name | com.maskbreak/mcp |
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