Hello HofstraContinuingEducation,
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.
The request for V3 application code samples is currently under review. However, we're currently still adding endpoints and capabilities to the V3 API, and do not plan to publish official sample apps until that process is complete. Your feedback and experience with this request is essential to improving our product, so thank you for reaching out to us regarding this matter.
For updates on which new features and endpoints have been released for Constant Contact's V3 API, you can stay updated by checking the Constant Contact V3 API Release Notes page:
V3 API - Release Notes
https://developer.constantcontact.com/api_guide/index.html
In the meantime, here are the example calls that are currently available for V3:
V3 Code Samples:
https://v3.developer.constantcontact.com/api_guide/tag_code_samples.html
Additionally, you can utilize our API Reference tester to test out the functionality of our available endpoints to see how they will work once programmed within your application:
https://v3.developer.constantcontact.com/api_reference/index.html
In order to use the V3 API endpoints, you’ll need to configure one of our available OAuth2 authorization flows. Since you mentioned the device code, I’m including our documentation for setting up the Device authorization flow below, along with overview documentation for all of our available authorization flows. Essentially, after completing the flow, you are issued an Access Token, which is sent in the authorization header of your request to the /activities/contacts_file_import endpoint.
OAuth2 Device Flow:
https://developer.constantcontact.com/api_guide/device_flow.html
OAuth2 Overview:
https://developer.constantcontact.com/api_guide/auth_overview.html
Please have a look and let us know if you have any other questions!
Regards,
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