diff --git a/src/libeis-socket.c b/src/libeis-socket.c
index 0b53f1a..915360d 100644
--- a/src/libeis-socket.c
+++ b/src/libeis-socket.c
@@ -180,3 +180,20 @@ eis_setup_backend_socket(struct eis *eis, const char *socketpath)
 
 	return rc;
 }
+
+_public_ pid_t
+eis_backend_socket_get_client_pid(struct eis_client* client)
+{
+	struct eis *eis = eis_client_get_context(client);
+	if (eis->backend_interface.destroy != interface_socket_destroy) {
+		log_bug_client(eis, "Not a socket backend");
+		return -EINVAL;
+	}
+	struct ucred ucred;
+	socklen_t len = sizeof(ucred);
+	int rc = getsockopt(source_get_fd(client->source), SOL_SOCKET, SO_PEERCRED, &ucred, &len);
+	if (rc < 0) {
+		return -errno;
+	}
+	return ucred.pid;
+}
diff --git a/src/libeis.h b/src/libeis.h
index 4654db4..6a0600a 100644
--- a/src/libeis.h
+++ b/src/libeis.h
@@ -32,6 +32,7 @@ extern "C" {
 #include <stddef.h>
 #include <stdbool.h>
 #include <stdint.h>
+#include <sys/types.h>
 
 /**
  * @defgroup libeis 🍦 EIS - The server API
@@ -535,6 +536,18 @@ eis_backend_fd_add_client(struct eis *ctx);
 int
 eis_setup_backend_socket(struct eis *ctx, const char *path);
 
+
+/**
+ * Return the pid of the client.
+ * The pid is retrieved via SO_PEERCRED.
+ * This function should only be called if the context was set up via
+ * eis_setup_backend_socket.
+ *
+ * @return The PID of the client or a negative errno on failure
+ */
+pid_t
+eis_backend_socket_get_client_pid(struct eis_client *client);
+
 /**
  * libeis keeps a single file descriptor for all events. This fd should be
  * monitored for events by the caller's mainloop, e.g. using select(). When