New JSON Standard Import API

I cam across this Community posting for JSON import via API.  I’m currently trying to import a Lucidchart document saved in JSON, but following the instruction, I get the error:

{
    "code": "badRequest",
    "message": "Bad or malformed request",
    "requestId": "6e921dd7e6e91f10",
    "details": {
        "error": "Expected JSON body"
    }
}

I obtained the .lucid file from the Git repository to test this import feature: https://github.com/lucidsoftware/sample-lucid-rest-applications/tree/main/standard-import

With below API, how can I fix the error?

Hi ​@Henry Rockwell,

I can’t see anything immediately wrong with the request you sent. Based on the error, it looks like the document.json file was found, but it had trouble reading the contents. Could you check that your document.json file contains valid json?

Are you willing to share which example from Lucid’s git repository you used? It’s possible that our example is not valid.

Thank you, ​@Trevor J, for your message.  I zipped up the files in the repo https://github.com/lucidsoftware/sample-lucid-rest-applications/tree/main/standard-import/demo-files/demo/unzipped-contents, then renamed as .lucid and used Postman, but Postman is giving me the errors.

However, if I try the same .lucid file in command line with curl, I was able to import the demo package from the git repository.  So, the first hurdle is cleared.

With this package, now I have replaced the .json file with the document I need to import.  After the curl command returned successful value:

{"documentId":"d4d9ddab-1dab-4311-a787-e753e1d80665","title":"Lucid ローカリゼーション","editUrl":"https://lucid.app/lucidchart/d4d9ddab-1dab-4311-a787-e753e1d80665/edit","viewUrl":"https://lucid.app/lucidchart/d4d9ddab-1dab-4311-a787-e753e1d80665/view","version":150,"pageCount":68,"canEdit":true,"creatorId":170886776,"lastModified":"2025-08-21T17:52:28Z","lastModifiedUserId":170886776,"trashed":null,"status":null,"classification":null,"customAttributes":[],"customTags":[],"parent":null,"product":"lucidchart","created":"2025-08-21T17:52:28Z"}

I went to the URL, but everything is empty.  No chart is imported.  I see the correct number of tabs (or pages) that my document has, and the tab text is also correct based on my JSON file, but all pages are blank.  What could be causing this?

​@Henry Rockwell,

That’s great that the correct pages are showing up. It’s difficult to tell why the shapes aren’t appearing correctly without seeing the JSON itself. I’ve sent you an email to continue debugging privately.

Hi there,

I could import JSON into Lucid.
But I wondered whether I can then manually polish the chart, and send it back via Standard import API for further programmatic use.

I could receive it, although without the JSON itself with this call:
curl -X GET "https://api.lucid.co/documents/b3d6b712-a10c-4c69-856e-c92b6c0977b2/export?format=standard_import" -H "Authorization: Bearer $LUCID_API_TOKEN" -H "Lucid-Api-Version: 1" -o exported_model.lucid

Is there a way to GET also the JSON with the content of the page (shapes etc)?

Sorry if the answer is elsewhere, but I could not find it..

BTW, if this is of any help, this is my output:
 

Hey Jan.Zalesak.  Our standard import flows do not support any methods for exporting  document content.  We do have a “Document Contents” API endpoint that will return you the contents of a document, but it does not include positioning data for shapes.  Additionally, standard import does not support modifying existing documents, only creating new documents, so If you make programmatic adjustments to a given documents contents, and then wish to re-import those into Lucid, it would need to be done into a new document.