I'm trying to set up a FLOW with an HTTP Callout "GET" request and I'm getting the below exception.


Error Occurred:

Callout failed for invocable action GetProspectLinkedinSearchTest.GetProspect Linkedin Search Test. We couldn't access the credential(s). You might not have the required permissions, or the external credential "GetProspect_Linkedin_Search_Test" might not exist.

I've added the named credential to the permission set. Still, I'm getting the exception.

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Here is the Request Template

url 'https://api.getprospect.com/public/v1/insights/contact?linkedinUrl=http%3A%2F%2Fwww.linkedin.com%2Fin%2'
--header 'accept: application/json'
--header 'apiKey: f5bxxxxxxxxxxxxxxxxxxxxxx'

I've no clue why I'm getting this issue

  • Missing permissions, see step 3 in salesforce.stackexchange.com/questions/409484/…
    – identigral
    Sep 28, 2023 at 15:25
  • Already i have provided through permission sets
    – Pavan tej
    Sep 28, 2023 at 15:32
  • Please edit your question and show that - see How to Ask
    – identigral
    Sep 28, 2023 at 15:36
  • 1
    Does the running user have R and View All on UserExternalCredential SObject?
    – cropredy
    Sep 28, 2023 at 16:05
  • I have provided the access through permission set. Still getting the same issue
    – Pavan tej
    Sep 28, 2023 at 18:20

1 Answer 1


I had the same problem as you.

The issue was resolved by assigning read permission on the "User External Credentials" in the "Object Settings". You can assign this directly in your permission set.

Reference: https://www.infallibletechie.com/2022/03/the-callout-couldnt-access-endpoint-you.html


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