It looks like the issue might be related to how the payload is structured and sent in the MATLAB code. The webwrite function in MATLAB does not directly support the multipart/form-data content type, which is required for the Enrichr API. Instead, you can use the matlab.net.http package to create a more complex HTTP request.
The Python code provided use the files parameter in the requests.post method, which is typically used for multipart form-data.
In the context of the Enrichr API, the files parameter is used to send the gene list and description as separate parts of the request, even though they are not files. This is a common pattern for APIs that expect multipart form-data.
I tried the following code and it worked -
import matlab.net.URI
import matlab.net.http.RequestMessage
import matlab.net.http.io.MultipartProvider
import matlab.net.http.io.MultipartFormProvider
ENRICHR_URL = 'https://maayanlab.cloud/Enrichr/addList';
genes = {'PHF14', 'RBM3', 'MSL1', 'PHF21A', 'ARL10', 'INSR', 'JADE2', 'P2RX7', ...
'LINC00662', 'CCDC101', 'PPM1B', 'KANSL1L', 'CRYZL1', 'ANAPC16', 'TMCC1', ...
'CDH8', 'RBM11', 'CNPY2', 'HSPA1L', 'CUL2', 'PLBD2', 'LARP7', 'TECPR2', ...
'ZNF302', 'CUX1', 'MOB2', 'CYTH2', 'SEC22C', 'EIF4E3', 'ROBO2', ...
'ADAMTS9-AS2', 'CXXC1', 'LINC01314', 'ATF7', 'ATP5F1'};
genes_str = strjoin(genes, newline);
description = 'Example gene list';
disp(genes_str)
disp(description)
% Create the payload
formData = MultipartFormProvider( 'list', genes_str, 'description', description);
% Create the request
request = RequestMessage('post', [], formData);
% Send the request
uri = URI(ENRICHR_URL);
response = send(request, uri);
disp(response)
