Why can't the Coze plugin pass object parameters? This problem is a lot like "interface not received", but the more common truth in public issues is that the layer that Coze passed to the plugin has dropped or flattened the object parameters. That said, the plugin itself is not necessarily a problem, but the problem may be with workflow inputs, node mapping, or the expression of parameter structures.
A typical public case is that the plugin only receives a request body with 'model_name', and you clearly have a 'extra_params' in the workflow. This means that the object parameter is truncated at a certain section of the link, not because the backend is not connected, but because the front end is not passed.
Why object parameters are the easiest to lose
Object parameters are more likely to cause problems in the workflow than simple types such as strings and numbers because they rely on nested structures. As long as you turn an object into a string or break up a subfield, the plugin node will receive different content than you expect. Many people think they have "mapped", but in fact they only map the outer fields, and the sub-attributes inside have not passed at all.
Let's take a look at these places first
- Is the workflow starting node outputting an object or already stringed JSON.
- Whether the plugin input parameter explicitly declares the object type instead of just writing a flat field.
- In the plugin execution log, what does the body actually sent look like?
A more stable approach in the community
If the object structure is complex, first flatten it, split it into several clear fields, and consider restoring the nested object after confirming that it can be passed normally. In many cases, letting the link run first saves time than insisting on preserving the original object structure. If you have to keep an object, be sure to look at the final request body, not just the field name on the workflow canvas.
In other words, if the plugin can't pass the object parameters, it's likely that the plugin won't accept it, but that the workflow doesn't send it the way it wants.
One sentence conclusion
The Coze plugin can't pass object parameters, so it usually checks the workflow input map first, and then checks whether the parameters are stringed or flattened. Once the object is deformed in the middle, the plug-in side will only see the incomplete data.
