HighLevel oAuth2: ERROR: Unable to sign without access token

Describe the problem/error/question

I am trying to connect to HighLevel API through OAuth2 like this guide Authorization | Integrations API. The authentication process went through as I got the login page and get the “connected” banner like this picture

What is the error message (if any)?

Yet when I try to call the simple API like Get Contacts Get Contacts | Integrations API, I get an error stating that “Unable to sign without access token”.

Please show me how to fix!

Please share your workflow

Information on your n8n setup

  • n8n version: 1.16.0
  • Database (default: SQLite): SQLite
  • n8n EXECUTIONS_PROCESS setting (default: own, main): own
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Docker

Hey @huuich,

Looking at the docs it could be that the the Access Token URL is incorrect, Can you try setting it to https://services.leadconnectorhq.com/oauth/token to see if it helps.

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@Jon Thanks for reply, I’m missing about docs Access Token URL. I’ve tried connect like you guide with new parameter in Setting and successfully, too. But when call API, I get a another error
“ERROR: Unprocessable Entity”

12/1/2023, 12:01:24 AM
Item Index: 0
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[...], // 4 items
"Unprocessable Entity",
NodeApiError: Unprocessable Entity
    at Object.execute (/usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/HttpRequest/V3/HttpRequestV3.node.js:1548:27)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at Workflow.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/Workflow.js:670:19)
    at /usr/local/lib/node_modules/n8n/node

P/s: Hi @Jon I’m follow above error and I find out I need to add more some parameter in Header and it’s working. Your guide is solution, thanks you very much!

1 Like

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