Not able to get access token

Campaign Collaborator
0 Votes

I follow these steps to get access token using post man. for v3 


1. Loginto
2. create app and generate secretcode
3. make below request through browser after changing client_id

4. Enable f12 for browser debug mode it will show the url in debug mode
something like https://localhost?code=Btm-DfwTesRXTplmOCEGpBI6CTD_GTL1FPclEAEt

5. Open PostMan and select request type as Post and make the below request after changing the Basic Auth and code parameter
Basic <client_id>:<secret_key>(base64encode)



Im getting this json error message.

"error_description": "unable to parse Authorization header HTTP Basic username has invalid content Value for parameter \"Authorization\" is invalid. Value doesn't match regular expression: .*",
"error": "invalid_client"



0 Votes

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.


It looks like we’ve already reached out to you directly via email regarding this issue to request some additional information in order to assist with troubleshooting. If you still need assistance with this, please let us know!


Courtney E.
Tier II API Support Engineer

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