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Question

Connect to Linkedin and execute a search on candidates

  • November 14, 2025
  • 5 replies
  • 26 views
D

I am creating a zap which triggers a file with search criteria on Linkedin. I am stuck with the step connecting to Linkedin and perform the search for candidates based on the criteria. I am also using gpt-5 and agent mode to connect to linkedin via mcp from zapier. When i do it manually in gpt-5 it works, but not in zapier. it keeps testing and testing. But has an error:

This ChatGPT (OpenAI) step hit an error

Required field "Server Label" (mcp_server_label) is missing. Required field "Server URL" (mcp_server_url) is missing.

Any ideas, who can help? Thanks.

5 replies

AndrewJDavison
Forum|alt.badge.img+11
  • AndrewJDavisonZapier Solution Partner
  • Zapier Solution Partner
  • November 14, 2025

​@doctorstrange When you say it “keeps testing and testing”, what do you mean here?

Can you show a screenshot?

Find out more and hire me: https://zapier.com/partnerdirectory/andrewjdavison (andrew@andrewjdavison.com)
D
  • doctorstrangeBeginner
  • Author
  • Beginner
  • November 14, 2025

Andrew, thanks for your reply, i corrected it. Please check the error i copied into the original message: 

This ChatGPT (OpenAI) step hit an error

Required field "Server Label" (mcp_server_label) is missing. Required field "Server URL" (mcp_server_url) is missing.
 

I have copied the mcp_server_url into the configuration but it is still missing information.

SamB
Community Manager
Forum|alt.badge.img+11
  • SamBCommunity Manager
  • Community Manager
  • November 21, 2025

Hey there ​@doctorstrange 👋

Were you able to get this sorted? 

If not, can you confirm whether you’ve got Developer Mode enabled in your OpenAI account?

Looking at the documentation here it seems that ChatGPT only supports MCP tools when developer mode is enabled:

582d35016a94b80a6b6b018eb4be43c2.png
 

So I’m wondering if that might be why it’s not passing the server label as expected. 

Looking forward to hearing from you!

D
  • doctorstrangeBeginner
  • Author
  • Beginner
  • November 24, 2025

Hi Sam, yes I turned to developer mode, i am still getting this message when testing the step. See printscreen. Its quite straight forward, right?

 

SamB
Community Manager
Forum|alt.badge.img+11
  • SamBCommunity Manager
  • Community Manager
  • November 25, 2025

Thanks for confirming that ​@doctorstrange. I had a closer look in my own Zap and entered a fake values into the Server Label field and Server URL field and got this error:

2f210f60bd5423e667e4b34505bfbce2.png
As the action appeared to be able to see the values in those fields, I then updated the values to just have a space character and got the same error that you’re getting:

d8507841837971e6814ed3be0dddf092.png
Next, I updated it to include a real MCP server URL and it worked without error:

b74e8e2ed14ad007b85745783c5d0bb3.png
 

Perhaps it could be that there’s an extra space at the start of the entered values that’s causing them not to be read 🤔

Can you try re-adding the values into those Server Label and Server URL fields, then test it again?

Keep us posted on how it goes!

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