Describe the problem/error/question
I am trying to fetch an attachment from airtable and upload it then to OpenAI:
But I receive the error “Bad request - please check your parameters”:
The http-Request seems to be fine and produces a binary file:
What is the problem or how can I solve the problem. I am running it with the selfhost-service on my synology-NAS.
What is the error message (if any)?
Bad request - please check your parameters
The browser (or proxy) sent a request that this server could not understand.
{
“errorMessage”: “Bad request - please check your parameters”,
“errorDescription”: “The browser (or proxy) sent a request that this server could not understand.”,
“errorDetails”: {
“rawErrorMessage”: [
“400 - {"error":{"message":"The browser (or proxy) sent a request that this server could not understand.","type":"server_error","param":null,"code":null}}”
],
“httpCode”: “400”
},
“n8nDetails”: {
“nodeName”: “OpenAI1”,
“nodeType”: “@n8n/n8n-nodes-langchain.openAi”,
“nodeVersion”: 1.8,
“resource”: “file”,
“operation”: “upload”,
“itemIndex”: 0,
“time”: “10.2.2025, 17:45:49”,
“n8nVersion”: “1.76.1 (Self Hosted)”,
“binaryDataMode”: “default”,
“stackTrace”: [
“NodeApiError: Bad request - please check your parameters”,
" at ExecuteContext.requestWithAuthentication (/usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/node-execute-functions.js:1297:19)“,
" at processTicksAndRejections (node:internal/process/task_queues:95:5)”,
" at ExecuteContext.requestWithAuthentication (/usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/node-execute-functions.js:1480:20)“,
" at ExecuteContext.apiRequest (/usr/local/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/dist/nodes/vendors/OpenAi/transport/index.js:22:12)”,
" at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/dist/nodes/vendors/OpenAi/actions/file/upload.operation.js:67:26)“,
" at ExecuteContext.router (/usr/local/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/dist/nodes/vendors/OpenAi/actions/router.js:75:34)”,
" at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/dist/nodes/vendors/OpenAi/OpenAi.node.js:16:16)“,
" at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/execution-engine/workflow-execute.js:632:19)”,
" at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/execution-engine/workflow-execute.js:890:51",
" at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/execution-engine/workflow-execute.js:1224:20"
]
}
}
Please share your workflow
(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)
{
"nodes": [
{
"parameters": {
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"authentication": "airtableTokenApi",
"baseId": {
"__rl": true,
"value": "appQRMowuiI1tT0F6",
"mode": "id"
},
"tableId": {
"__rl": true,
"value": "tblV197pgZaWa6Hz2",
"mode": "id"
},
"triggerField": "Erstellt um",
"additionalFields": {
"fields": ""
}
},
"type": "n8n-nodes-base.airtableTrigger",
"typeVersion": 1,
"position": [
-1600,
20
],
"id": "577f5715-17c8-4d89-9588-60e091e43f61",
"name": "Airtable Trigger",
"credentials": {
"airtableTokenApi": {
"id": "QUrLt5QMFeVRiqWY",
"name": "Airtable account"
}
}
},
{
"parameters": {
"url": "={{ $json.fields.Anhang[1].url }}",
"options": {
"response": {
"response": {
"responseFormat": "file",
"outputPropertyName": "attachment_0"
}
}
}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
-1380,
20
],
"id": "0506ec51-ba22-4681-9f2b-1a0492fa3857",
"name": "HTTP Request1"
},
{
"parameters": {
"resource": "file",
"binaryPropertyName": "attachment_0",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 1.8,
"position": [
-1120,
20
],
"id": "f61111b7-1af5-4857-b4ed-d9cc8b85a189",
"name": "OpenAI1",
"credentials": {
"openAiApi": {
"id": "Xi5oQW7t2TS4QaVr",
"name": "n8n"
}
}
}
],
"connections": {
"Airtable Trigger": {
"main": [
[
{
"node": "HTTP Request1",
"type": "main",
"index": 0
}
]
]
},
"HTTP Request1": {
"main": [
[
{
"node": "OpenAI1",
"type": "main",
"index": 0
}
]
]
}
},
"pinData": {},
"meta": {
"templateCredsSetupCompleted": true,
"instanceId": "2b8389b15f8febc60e4ea42193783d59be45929cefbab62df923cf5dfbb50b3e"
}
}
Share the output returned by the last node
Information on your n8n setup
- n8n version: 1.76.1
- Database (default: SQLite):
- n8n EXECUTIONS_PROCESS setting (default: own, main):
- Running n8n via (Docker, npm, n8n cloud, desktop app): via Docker on Synology NAS
- Operating system:
