Describe the problem/error/question
Hi, I’m currently building an agent in n8n.
I selected OpenAI as the model and set up the credentials by pointing the endpoint to my own Mistral server running via vLLM.
When I connect only this node to the agent and start chatting, it responds correctly.
However, as soon as I connect the MCP client, I get a “status code 400: no body” error.
Has anyone experienced a similar issue?
I’d appreciate any insights or suggestions on how to resolve this. Thanks!
What is the error message (if any)?
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”: {
“model”: {
“__rl”: true,
“value”: “mistralai/Mistral-7B-Instruct-v0.3”,
“mode”: “list”,
“cachedResultName”: “mistralai/Mistral-7B-Instruct-v0.3”
},
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.lmChatOpenAi”,
“typeVersion”: 1.2,
“position”: [
400,
360
],
“id”: “63c657ab-b9a5-46a5-a602-29ab469ceadc”,
“name”: “clops dev-aip-hcx opensource”,
“notesInFlow”: false,
“credentials”: {
“openAiApi”: {
“id”: “KX9xSgAQdMC4h9P5”,
“name”: “clops dev-aip-hcx opensource”
}
}
}
],
“connections”: {
“clops dev-aip-hcx opensource”: {
“ai_languageModel”: [
]
}
},
“pinData”: {},
“meta”: {
“templateId”: “PT1i+zU92Ii5O2XCObkhfHJR5h9rNJTpiCIkYJk9jHU=”,
“templateCredsSetupCompleted”: true,
“instanceId”: “d6c7ac577432b4d9961be82ff0f7288eb52877fcf0a82a0612fa7fee4d443593”
}
}
Share the output returned by the last node
Information on your n8n setup
- n8n version: 1.88.0
- Database (default: SQLite): default
- n8n EXECUTIONS_PROCESS setting (default: own, main): default
- Running n8n via (Docker, npm, n8n cloud, desktop app): docker
- Operating system: linux ubuntu