diff --git a/src/socket.js.h b/src/socket.js.h
index f4a372ab7..1416d9066 100644
--- a/src/socket.js.h
+++ b/src/socket.js.h
@@ -8,8 +8,23 @@
 
 #include "quickjs.h"
 
+/**
+** Register the socket script interface.
+** @param context The JS context.
+** @return The Socket constructor.
+*/
 JSValue tf_socket_register(JSContext* context);
+
+/**
+** Get the number of active socket objects.
+** @return The count.
+*/
 int tf_socket_get_count();
+
+/**
+** Get the number of connected socket objects.
+** @return the count.
+*/
 int tf_socket_get_open_count();
 
 /** @} */
diff --git a/src/ssb.connections.h b/src/ssb.connections.h
index 8bb8ae04c..6be839bdd 100644
--- a/src/ssb.connections.h
+++ b/src/ssb.connections.h
@@ -7,14 +7,50 @@
 ** @{
 */
 
+/** An SSB instance. */
 typedef struct _tf_ssb_t tf_ssb_t;
+
+/** An SSB connections tracker instance. */
 typedef struct _tf_ssb_connections_t tf_ssb_connections_t;
 
+/**
+** Create a connection tracker.
+** @param ssb The SSB instance.
+** @return The connection tracker instance.
+*/
 tf_ssb_connections_t* tf_ssb_connections_create(tf_ssb_t* ssb);
+
+/**
+** Destroy a connection tracker.
+** @param connections The connection tracker to destroy.
+*/
 void tf_ssb_connections_destroy(tf_ssb_connections_t* connections);
 
+/**
+** Store a connection in the connection tracker.
+** @param connections The connection tracker.
+** @param host The host name or address.
+** @param port The network port number.
+** @param key The identity on the other end of the connection.
+*/
 void tf_ssb_connections_store(tf_ssb_connections_t* connections, const char* host, int port, const char* key);
+
+/**
+** Record that a connection was recently attempted.
+** @param connections The connection tracker.
+** @param host The host name or address.
+** @param port The network port number.
+** @param key The identity on the other end of the connection.
+*/
 void tf_ssb_connections_set_attempted(tf_ssb_connections_t* connections, const char* host, int port, const char* key);
+
+/**
+** Record that a connection recently succeeded.
+** @param connections The connection tracker.
+** @param host The host name or address.
+** @param port The network port number.
+** @param key The identity on the other end of the connection.
+*/
 void tf_ssb_connections_set_succeeded(tf_ssb_connections_t* connections, const char* host, int port, const char* key);
 
 /** @} */
diff --git a/src/ssb.export.h b/src/ssb.export.h
index 9b7bc9561..96106057a 100644
--- a/src/ssb.export.h
+++ b/src/ssb.export.h
@@ -8,8 +8,14 @@
 ** @{
 */
 
+/** An SSB instance. */
 typedef struct _tf_ssb_t tf_ssb_t;
 
+/**
+** Export an app to disk.
+** @param ssb The SSB instance.
+** @param key The app path in the form "/~user/appname".
+*/
 void tf_ssb_export(tf_ssb_t* ssb, const char* key);
 
 /** @} */