Issue with HTTP Status 400 - Bad Request when sending email campaigns

Brand Strategist
0 Votes

I am writing to bring to your attention an issue I have been experiencing today. I have been unable to send the Zoom link to the participants as I keep receiving an HTTP Status 400 – Bad Request error.

This is a time-sensitive matter, as I need to provide the Zoom link to all the attendees in a timely manner. I would greatly appreciate if you could please look into this problem and provide a resolution as soon as possible.

Thank you in advance for your assistance. I am available should you require any additional information from me.

0 Votes

Hello MarilagM3,


Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.


If you are still experiencing issues with this, please reach out to our team directly/securely via email at referencing case 32520101 with: The API key (or name of the integration) that you are using, and the username of the account that you are trying to publish the emails to so that we can take a look at our logs and assist further.


Please have a look and let us know if you have any other questions!


Courtney E.
Tier II API Support Engineer

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Constant Contact Partner
0 Votes

I have gotten this 400 HTTP error on every email send for the last few weeks... the emails seem to be going out regardless, so I haven't been too worried about it.  I'm not using any APIs, this is directly on the CC website.Screenshot 2024-07-19 145659.png

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