n8n

n8n: configure a model connection in an automation workflow.

Published instructions · App version: unverified

Chat, ping, invoke and content-generation examples may send real billable requests. Check the model, balance, rate and minimum before running them. GET /v1/models checks authentication and the catalogue only. Set up environment variables safely

Base URL to paste

OpenAI SDKs generally use a URL ending in /v1; Anthropic SDKs use the root URL. Avoid adding /v1 twice. Protocol compatibility does not guarantee every provider feature.

https://thapi.cloud/v1

Prerequisites

n8n instance
API keys

Recommended model: claude-fable-5

Quick way — command / config

Credentials → OpenAI API
  API Key  : sk-thapi-...
  Base URL : https://thapi.cloud/v1

# For an Anthropic node:
  API Key  : sk-thapi-...
  Base URL : https://thapi.cloud

Node LLM → Model: claude-fable-5

Where to place file / fill Settings

Interfaceany

Credentials → OpenAI / Anthropic

Some n8n versions place Base URL in the node's Options section — check both locations.

Verify connection

Execute a workflow with one LLM node
View Usage

Troubleshooting

Symptom	Reason	How to handle
404	Base URL does not match the node's protocol.	OpenAI node → https://thapi.cloud/v1; Anthropic node → https://thapi.cloud.

Flowise · Langflow · Dify