API Developer Support

What’s Trending in 2026? Let’s Plan Ahead—Together. 📈
Explore the trends + tell us how you’d use them.

Learn More
S
SullivanAuctioneers1
·Posted in API Developer Support

Backend Integration

We wanted help with integration of Constant contact to our server-side. We are looking to Post data into Mail listings. Right now, we are able to get the Auth_code, But if we use the same Auth code while getting the Access Token we are getting the error message "error_description": "The authorization code is invalid or has expired.". Even though we are generating a new code, the error still persists.
accesstoken
authorization
backend
integration
refreshtoken
1 reply

Join Our New Small Business Marketplace!

We're highlighting small businesses from our community. Add your business to the Marketplace to get discovered by new customers and support other entrepreneurs.

Check it Out

Popular Posts:

  • 💌 Coming Soon: A New and Improved Canva Integration!

  • 📊 What Industry Are You In? Cast Your Vote!

  • ☃️What’s Your Open Rate MVP?

© Constant Contact, Inc. 1996-2025

TermsCommunity TermsCommunity GuidelinesPrivacyVulnerability Disclosure