API Tester returns bad request

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API Tester returns bad request

I'm using this testing a post request on the api tester and it return a 400 bad request.


   "lists":[{"id": "1712653224"}], 




Re: API Tester returns bad request

Hello @MartinC966,


Thank you for reaching out to Constant Contact's API Support.


If you are making a POST then the JSON data format is correct and I would look in to either your header information or how you have your endpoint URL formatted.


Jimmy D.
Tier II API Support Engineer
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