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rameshp575128
rameshp575128
October 13, 2025
Question

Unable to Invoke Web API

  • October 13, 2025
  • 2 replies
  • 0 views

I am trying to invoke an Appian web-Api using Insomnia, which is a GET method, it queries db and fetches results.
I am passing the Api key as header in insomnia.
I have mapped the service accounts and security every thing correctly, but still i am nit able to invoke the API.
I am getting this error : Error: Couldn't resolve host name

2 replies

shubhama926776
shubhama926776
October 13, 2025

Hostname in your API URL is not reachable or not resolving. Check the exact API URL in Insomnia for typos, ensure your network/DNS can resolve that hostname, and verify no firewall or VPN is blocking access.

    harshas2775
    harshas2775
    October 13, 2025

    Few things to check and try:

    • Test API outside Appian if API works as expected - this confirms your configuration like URL, service account details etc are correct
    • Once configuration is working as expected outside Appian but not in Appian then check network/ infrastructure settings for permissions.
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