Export Blender Actions (.json)

io_export_actions.py

import bpy
import json

json.encoder.c_make_encoder = None
json.encoder.FLOAT_REPR = lambda o: format(o, '.6f')

actions = []
for action in bpy.data.actions:
    a = {
        'name': action.name,
        'range': list(action.frame_range),
        'groups': [],
    }
    for group in action.groups:
        g = {
            'name': group.name,
            'channels': [],
        }
        for fcurve in group.channels:
            c = {
                'path': fcurve.data_path,
                'index': fcurve.array_index,
                'points': [],
            }
            for point in fcurve.keyframe_points:
                p = {
                    'a': list(point.handle_left),
                    'b': list(point.handle_right),
                    'co': list(point.co),
                    'lerp': point.interpolation.lower(),
                }
                c['points'].append(p)
            g['channels'].append(c)
        a['groups'].append(g)
    actions.append(a)

print(json.dumps(actions))