Posting JSON with MVT:CALL

[paul.oreilly]

I'm trying to post some simple JSON (to the Mailchimp API), but I get back and error that says what I'm sending is NULL. Here's the code:

<mvt:assign name="g.list_id" value="'d579b341b9'" />
<mvt:assign name="g.tag_url" value="'https://us2.api.mailchimp.com/3.0/lists/'$ g.list_id $'/segments/21/members'" />
<mvt:assign name="g.add_email" value="'{  \"email_address\": \"[email protected]\"}'" />
<mvt:assign name="g.headers" value="'Authorization: Basic xxxxxxxxxxxxxxxxxx' $ asciichar( 13 ) $ asciichar( 10 )" />

<mvt:call action="g.tag_url" method="'POST'" fields="g.add_email" content-type="'application/json'" headers="g.headers" >
<mvt:eval expr="s.callvalue" />
Yields the error:
"errors":[{"field":"","message":"Schema describes object, NULL found instead"}]
</mvt:call>

I tried encoding the JSON as well, but that didn't work. Do I need to prepare the data in some other form?

Any help greatly appreciated.

Best,
Paul

[dcarver]

You probably need to set your method to 'RAW' and fields should be a comma separated list of variables, but you are passing it a data value directly. Meaning you should be doing fields="'g.add_email'" I believe. Also I recommend editing your post and removing your authorization token, anyone could potentially use that token and impersonate your or read your data.

[paul.oreilly]

Thank You! Method as RAW, and wrapping the fields as a string did it. Removing my token from this post, also a good idea!