AI agent http request fails on passing parameter

[Roman_G]

HI,
I am trying to call an API with AI agent and HTTP request. As an input parameter I am sending object ID. I am constantly getting “Invalid URL”

    {
      "parameters": {
        "toolDescription": "get metadata for business object by id",
        "url": " https://testdl-schema/v1/schema-creation-currated/{boId}",
        "sendHeaders": true,
        "parametersHeaders": {
          "values": [
            {
              "name": "cookie",
              "valueProvider": "fieldValue",
              "value": ""
            }
          ]
        },
        "placeholderDefinitions": {
          "values": [
            {
              "name": "boId",
              "description": "=the id of the first business object / bussiness_object from the list {{ $json.output.business_object[0].id }}"
            }
          ]
        },
        "optimizeResponse": true
      },
      "type": "@n8n/n8n-nodes-langchain.toolHttpRequest",
      "typeVersion": 1.1,
      "position": [
        520,
        100
      ],
      "id": "49a062f4-771e-4181-bc4d-368036583b92",
      "name": "get metadata",
      "notesInFlow": false
    },

I can see from debug that parameter correctly passed to the node:

but I am getting “There was an error: “Invalid URL””

I cant find any place to exactly see what request n8n has made

Information on your n8n setup

• n8n version: 1.84.3
• Database (default: SQLite):
• n8n EXECUTIONS_PROCESS setting (default: own, main):
• Running n8n via (Docker, npm, n8n cloud, desktop app):
• Operating system:

[Franz]

You can check the tools and requests executed by agent in the chat.
But regarding your url … it simply starts with a whitespace.