web
You’re offline. This is a read only version of the page.
close
Skip to main content

Announcements

News and Announcements icon
Community site session details

Community site session details

Session Id :
Power Platform Community / Forums / Power Automate / Invoke Web Service Error
Power Automate
Answered

Invoke Web Service Error

(0) ShareShare
ReportReport
Posted on by 3

Error:

"error":"Unexpected token % in JSON at position 0"

 

I'm running a simple test query against a public API.  Running the same query via curl or Postman or HTTPRest works fine.

 

The frustrating part is I don't see any way to view a log - I want to see exactly what PAD sent to the endpoint. 

 

  • I'm already adding headers into a list variable, the list does not have spaces between the key:value (tried both ways)
  • I've turned on 'Flow Monitoring Window' which seems to do nothing. 
  • I have looked in the web portal but I can't see Desktop Flows in there, presumably because I haven't got a premium account.  and I can't seem to make a premium account, or add premium to my existing account. I already paid for O365! 

 

I'm not a corporate user or a school, just an independent developer looking to improve my skills with Automation and job prospects.

 

 

  • Verified answer
    kinuasa Profile Picture
    801 Most Valuable Professional on at

    If the "Encode request body" option is turned on, turn it off and execute.

     

    • Invoke web service

    https://learn.microsoft.com/en-us/power-automate/desktop-flows/actions-reference/web?WT.mc_id=M365-MVP-4029057#invokewebservicebase

Under review

Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.

Helpful resources

Quick Links

Season of Sharing Community Challenge Winners!

Congratulations to our community stars!

Kudos to our 2025 Community Spotlight Honorees

Expanding mentorship, skilling, and AI innovation

Congratulations to the July Top 10 Community Leaders!

These are the community rock stars!

Leaderboard > Power Automate

#1
David_MA Profile Picture

David_MA 229 Super User 2026 Season 2

#2
11manish Profile Picture

11manish 223 Super User 2026 Season 2

#3
Valantis Profile Picture

Valantis 136 Super User 2026 Season 2

Last 30 days Overall leaderboard