Hello KathleenP027,
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.
Applications that integrate with Constant Contact must use the OAuth2 authorization protocol to securely authenticate a Constant Contact user account, and to be granted access to that user's data. To provide improved security, Constant Contact is now using a new authorization management service, and will be ending support for the previous service/keys on March 31, 2022.
This means that all new V3 API keys generated through the My Applications page within the Developer Portal (https://app.constantcontact.com/pages/dma/portal/) will not be compatible with applications/integrations/plugins that have not yet been updated by their developers. Additionally, if the developer does not update their application, existing API keys will no longer be able to connect to Constant Contact as of March 31, 2022.
If you have any concerns about this, please contact the application's developer directly. If the developer has any questions or concerns, you’re welcome to refer them to the article link below and/or have them follow up with us directly via email at webservices@constantcontact.com with any questions.
V3 API - Update Your Applications to Use the New Authorization Service
https://v3.developer.constantcontact.com/api_guide/auth_update_apps.html
Support » Plugin: Gravity Forms Constant Contact
https://wordpress.org/support/plugin/gravity-forms-constant-contact/
Please have a look and let us know if you have any other questions!
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