Can't Post data containing $ in a key to Firebase

Question

I'm attempting to post some data into Firebase (relative part of the URL is /messages.json). The following request content:

{"gsx$enddate":"sometime"}

Gives the following error:

Invalid data; couldn't parse JSON object, array, or value. Perhaps you're using invalid characters in your key names.

This is valid JSON however. What am I doing wrong?

Answer 1

It's supposed to be a valid JSON but it seems like it's a limitation for FireBase

From FireBase Documentation:

Character Set Limitations

Note that URLs used to construct Firebase references may contain any unicode characters except:

• . (period)
• $ (dollar sign)
• [ (left square bracket)
• ] (right square bracket)
• # (hash or pound sign)
• / (forward slash)