diff --git a/bin/_pathfix.py b/bin/_pathfix.py
index e31d741..e792a23 100644
--- a/bin/_pathfix.py
+++ b/bin/_pathfix.py
@@ -12,3 +12,4 @@ sys.path.insert(0, project_path)
 
 db_path = join(project_path, "db", "mh4u.db")
 motion_values_path = join(project_path, "db", "motion_values.json")
+web_path = join(project_path, "web")
diff --git a/bin/genrewards.py b/bin/genrewards.py
index 57d2757..c1ab1fb 100755
--- a/bin/genrewards.py
+++ b/bin/genrewards.py
@@ -5,6 +5,7 @@ Script to generate static rewards files for all items.
 
 import codecs
 import urllib
+import os.path
 
 import _pathfix
 
@@ -21,11 +22,14 @@ if __name__ == '__main__':
     import os
     import os.path
 
-    if len(sys.argv) != 2:
-        print("Usage: %s outdir" % sys.argv[0])
+    if len(sys.argv) == 1:
+        outdir = os.path.join(_pathfix.web_path, "rewards")
+    elif len(sys.argv) == 2:
+        outdir = sys.argv[1]
+    else:
+        print("Usage: %s [outdir]" % sys.argv[0])
         sys.exit(os.EX_USAGE)
 
-    outdir = sys.argv[1]
     err_out = get_utf8_writer(sys.stderr)
 
     # TODO: doesn't work if script is symlinked
diff --git a/bin/mkjsonapi.py b/bin/mkjsonapi.py
new file mode 100755
index 0000000..ad61869
--- /dev/null
+++ b/bin/mkjsonapi.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python
+
+import os
+import json
+import sys
+import errno
+from collections import defaultdict
+
+import _pathfix
+
+from mhapi.db import MHDB
+from mhapi import model
+
+
+def mkdirs_p(path):
+    try:
+        os.makedirs(path)
+    except OSError as e:
+        if e.errno != errno.EEXIST:
+            raise
+
+
+def write_list_file(path, model_list):
+    list_path = os.path.join(path, "_list.json")
+    with open(list_path, "w") as f:
+        json.dump([o.as_list_data() for o in model_list], f, indent=2)
+
+
+def write_index_file(path, indexes):
+    index_path = os.path.join(path, "_index.json")
+    with open(index_path, "w") as f:
+        json.dump(indexes, f, indent=2)
+
+
+def monster_json(db, path):
+    monsters = db.get_monsters()
+    mkdirs_p(path)
+    write_list_file(path, monsters)
+
+    indexes = {}
+    for m in monsters:
+        monster_path = os.path.join(path, "%s.json" % m.id)
+        m.update_indexes(indexes)
+        data = m.as_data()
+        damage = db.get_monster_damage(m.id)
+        data["damage"] = damage.as_data()
+        with open(monster_path, "w") as f:
+            json.dump(data, f, cls=model.ModelJSONEncoder, indent=2)
+
+    write_index_file(path, indexes)
+
+
+def weapon_json(db, path):
+    weapons = db.get_weapons()
+    mkdirs_p(path)
+    write_list_file(path, weapons)
+
+    indexes = {}
+    for w in weapons:
+        weapon_path = os.path.join(path, "%s.json" % w.id)
+        w.update_indexes(indexes)
+        with open(weapon_path, "w") as f:
+            w.json_dump(f)
+
+    write_index_file(path, indexes)
+
+
+def items_json(db, path):
+    items = db.get_items()
+    mkdirs_p(path)
+    write_list_file(path, items)
+
+    indexes = {}
+    for item in items:
+        item_path = os.path.join(path, "%s.json" % item.id)
+        item.update_indexes(indexes)
+        with open(item_path, "w") as f:
+            item.json_dump(f)
+
+    write_index_file(path, indexes)
+
+
+def main():
+    db = MHDB(_pathfix.db_path)
+
+    if len(sys.argv) > 1:
+        outpath = sys.argv[1]
+    else:
+        outpath = os.path.join(_pathfix.web_path, "jsonapi")
+
+    items_json(db, os.path.join(outpath, "item"))
+    weapon_json(db, os.path.join(outpath, "weapon"))
+    monster_json(db, os.path.join(outpath, "monster"))
+    #quest_json
+
+
+if __name__ == '__main__':
+    main()