Hello HopeandCope,
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.
Account credentials will always be needed at some point to connect the integration and grant access to the account.
In a case like yours, where someone else is setting up the integration, there are typically ways to bypass giving credentials to the 3rd party by just having you connect and grant access instead of them.
The process will depend on whether they are building/coding the form themselves, using a 3rd party integration/plugin, and also what version of the API is being used.
If you are able to gather a few more details (such as the name of the integration/plugin if it is 3rd party, who your website host is, whether they are building the form themselves, etc), we'd be happy to see if we can provide more insight.
You can reach our team directly/securely via email at webservices@constantcontact.com to follow up.
Please have a look and let us know if you have any other questions!
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