# CallerIdentity.serverProcessID

- **Module:** CallerIdentity
- **Package:** LibTmuxMCP
- **Language:** Swift
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-swift/blob/254f8b2be7eb60cacc3ffcb3ea8e456784f582df/Sources/LibTmuxMCP/Caller.swift#L18
- **Page:** https://libtmux.org/en/swift/latest/mcp/reference/calleridentity-serverprocessid/

The surrounding server's process id. It authenticates alternate routes to one socket and rejects a daemon that replaced one exact route.