diff --git a/api.c b/api.c
index 03eb75fc..2e070262 100644
--- a/api.c
+++ b/api.c
@@ -631,6 +631,35 @@ static char *escape_string(char *str, bool isjson)
 	return buf;
 }
 
+static struct api_data *api_add_extra(struct api_data *root, struct api_data *extra)
+{
+	struct api_data *tmp;
+
+	if (root)
+	{
+		if (extra) {
+			// extra tail
+			tmp = extra->prev;
+
+			// extra prev = root tail
+			extra->prev = root->prev;
+
+			// root tail next = extra
+			root->prev->next = extra;
+
+			// extra tail next = root
+			tmp->next = root;
+
+			// root prev = extra tail
+			root->prev = tmp;
+		}
+	}
+	else
+		root = extra;
+
+	return root;
+}
+
 static struct api_data *api_add_data_full(struct api_data *root, char *name, enum api_data_type type, void *data, bool copy_data)
 {
 	struct api_data *api_data;
@@ -2669,33 +2698,36 @@ void dosave(__maybe_unused SOCKETTYPE c, char *param, bool isjson, __maybe_unuse
 	ptr = NULL;
 }
 
-static int itemstats(int i, char *id, struct cgminer_stats *stats, struct cgminer_pool_stats *pool_stats, char *extra, bool isjson)
+static int itemstats(int i, char *id, struct cgminer_stats *stats, struct cgminer_pool_stats *pool_stats, struct api_data *extra, bool isjson)
 {
 	struct api_data *root = NULL;
 	char buf[TMPBUFSIZ];
 
+/*
 	if (stats->getwork_calls || (extra != NULL && *extra)) {
 		if (extra == NULL)
 			extra = (char *)BLANK;
+*/
 
-		root = api_add_int(root, "STATS", &i, false);
-		root = api_add_string(root, "ID", id, false);
-		root = api_add_double(root, "Elapsed", &(total_secs), false);
-		root = api_add_uint32(root, "Calls", &(stats->getwork_calls), false);
-		root = api_add_timeval(root, "Wait", &(stats->getwork_wait), false);
-		root = api_add_timeval(root, "Max", &(stats->getwork_wait_max), false);
-		root = api_add_timeval(root, "Min", &(stats->getwork_wait_min), false);
+	root = api_add_int(root, "STATS", &i, false);
+	root = api_add_string(root, "ID", id, false);
+	root = api_add_double(root, "Elapsed", &(total_secs), false);
+	root = api_add_uint32(root, "Calls", &(stats->getwork_calls), false);
+	root = api_add_timeval(root, "Wait", &(stats->getwork_wait), false);
+	root = api_add_timeval(root, "Max", &(stats->getwork_wait_max), false);
+	root = api_add_timeval(root, "Min", &(stats->getwork_wait_min), false);
 
-		if (pool_stats) {
-			root = api_add_uint32(root, "Pool Calls", &(pool_stats->getwork_calls), false);
-			root = api_add_uint32(root, "Pool Attempts", &(pool_stats->getwork_attempts), false);
-			root = api_add_timeval(root, "Pool Wait", &(pool_stats->getwork_wait), false);
-			root = api_add_timeval(root, "Pool Max", &(pool_stats->getwork_wait_max), false);
-			root = api_add_timeval(root, "Pool Min", &(pool_stats->getwork_wait_min), false);
-			root = api_add_double(root, "Pool Av", &(pool_stats->getwork_wait_rolling), false);
-		}
+	if (pool_stats) {
+		root = api_add_uint32(root, "Pool Calls", &(pool_stats->getwork_calls), false);
+		root = api_add_uint32(root, "Pool Attempts", &(pool_stats->getwork_attempts), false);
+		root = api_add_timeval(root, "Pool Wait", &(pool_stats->getwork_wait), false);
+		root = api_add_timeval(root, "Pool Max", &(pool_stats->getwork_wait_max), false);
+		root = api_add_timeval(root, "Pool Min", &(pool_stats->getwork_wait_min), false);
+		root = api_add_double(root, "Pool Av", &(pool_stats->getwork_wait_rolling), false);
+	}
 
-// TODO: zzzz handle extra <- rewrite the api interface
+	if (extra)
+		root = api_add_extra(root, extra);
 
 /*
 		sprintf(buf, isjson
@@ -2729,21 +2761,21 @@ static int itemstats(int i, char *id, struct cgminer_stats *stats, struct cgmine
 
 		strcat(io_buffer, buf);
 */
-		if (isjson && (i > 0))
-			strcat(io_buffer, COMMA);
+	if (isjson && (i > 0))
+		strcat(io_buffer, COMMA);
 
-		root = print_data(root, buf, isjson);
-		strcat(io_buffer, buf);
+	root = print_data(root, buf, isjson);
+	strcat(io_buffer, buf);
 
-		i++;
-	}
+	i++;
+//	}
 
 	return i;
 }
 
 static void minerstats(__maybe_unused SOCKETTYPE c, __maybe_unused char *param, bool isjson, __maybe_unused char group)
 {
-	char extra[TMPBUFSIZ];
+	struct api_data *extra;
 	char id[20];
 	int i, j;
 
@@ -2760,9 +2792,9 @@ static void minerstats(__maybe_unused SOCKETTYPE c, __maybe_unused char *param,
 
 		if (cgpu && cgpu->api) {
 			if (cgpu->api->get_api_stats)
-				cgpu->api->get_api_stats(extra, cgpu, isjson);
+				extra = cgpu->api->get_api_stats(cgpu);
 			else
-				extra[0] = '\0';
+				extra = NULL;
 
 			sprintf(id, "%s%d", cgpu->api->name, cgpu->device_id);
 			i = itemstats(i, id, &(cgpu->cgminer_stats), NULL, extra, isjson);
diff --git a/driver-icarus.c b/driver-icarus.c
index 442eb9d1..a543bf8e 100644
--- a/driver-icarus.c
+++ b/driver-icarus.c
@@ -676,13 +676,30 @@ static uint64_t icarus_scanhash(struct thr_info *thr, struct work *work,
 	return hash_count;
 }
 
-static void icarus_api_stats(char *buf, struct cgpu_info *cgpu, bool isjson)
+//static void icarus_api_stats(char *buf, struct cgpu_info *cgpu, bool isjson)
+static struct api_data *icarus_api_stats(struct cgpu_info *cgpu)
 {
+	struct api_data *root = NULL;
 	struct ICARUS_INFO *info = icarus_info[cgpu->device_id];
 
 	// Warning, access to these is not locked - but we don't really
 	// care since hashing performance is way more important than
 	// locking access to displaying API debug 'stats'
+	// If locking becomes an issue for any of them, use copy_data=true also
+	root = api_add_int(root, "read_count", &(info->read_count), false);
+	root = api_add_double(root, "fullnonce", &(info->fullnonce), false);
+	root = api_add_int(root, "count", &(info->count), false);
+	root = api_add_hs(root, "Hs", &(info->Hs), false);
+	root = api_add_double(root, "W", &(info->W), false);
+	root = api_add_uint(root, "total_values", &(info->values), false);
+	root = api_add_uint64(root, "range", &(info->hash_count_range), false);
+	root = api_add_uint64(root, "history_count", &(info->history_count), false);
+	root = api_add_timeval(root, "history_time", &(info->history_time), false);
+	root = api_add_uint(root, "min_data_count", &(info->min_data_count), false);
+	root = api_add_uint(root, "timing_values", &(info->history[0].values), false);
+	root = api_add_const(root, "timing_mode", timing_mode_str(info->timing_mode), false);
+	root = api_add_bool(root, "is_timing", &(info->do_icarus_timing), false);
+/*
 	sprintf(buf, isjson
 		? "\"read_count\":%d,\"fullnonce\":%f,\"count\":%d,\"Hs\":%.15f,\"W\":%f,\"total_values\":%u,\"range\":%"PRIu64",\"history_count\":%"PRIu64",\"history_time\":%f,\"min_data_count\":%u,\"timing_values\":%u"
 		: "read_count=%d,fullnonce=%f,count=%d,Hs=%.15f,W=%f,total_values=%u,range=%"PRIu64",history_count=%"PRIu64",history_time=%f,min_data_count=%u,timing_values=%u",
@@ -693,6 +710,9 @@ static void icarus_api_stats(char *buf, struct cgpu_info *cgpu, bool isjson)
 		(double)(info->history_time.tv_sec)
 			+ ((double)(info->history_time.tv_usec))/((double)1000000),
 		info->min_data_count, info->history[0].values);
+*/
+
+	return root;
 }
 
 static void icarus_shutdown(struct thr_info *thr)
diff --git a/miner.h b/miner.h
index bd13b0e7..316b314a 100644
--- a/miner.h
+++ b/miner.h
@@ -220,6 +220,7 @@ struct gpu_adl {
 };
 #endif
 
+struct api_data;
 struct thr_info;
 struct work;
 
@@ -234,7 +235,7 @@ struct device_api {
 	void (*reinit_device)(struct cgpu_info*);
 	void (*get_statline_before)(char*, struct cgpu_info*);
 	void (*get_statline)(char*, struct cgpu_info*);
-	void (*get_api_stats)(char*, struct cgpu_info*, bool);
+	struct api_data *(*get_api_stats)(struct cgpu_info*);
 
 	// Thread-specific functions
 	bool (*thread_prepare)(struct thr_info*);