Tool configuration
Connect SeaLink models in n8n's OpenAI node to power your automation workflows. Works with both n8n Cloud and self-hosted instances.
Log into n8n (app.n8n.cloud or your self-hosted instance) and open the workflow editor.
Click the gear icon (bottom-left) → 'Credentials' → 'Add Credential' → search 'OpenAI' → select 'OpenAI API'. If OpenAI isn't listed, install the n8n-nodes-openai community node. n8n 1.0 and above includes it out of the box.
Fill in the credential form: API Key: Paste your SeaLink API Key (starts with sk-sealink-) Base URL: https://api.sealink.io/v1 Leave all other fields empty and click 'Save'.
Create a new workflow → add an 'OpenAI' node → select your SeaLink credential in the node settings → enter a model ID in the 'Model' field (e.g. claude-opus-5-5). One thing to note: n8n's Model field is a free-text input, not a dropdown. You'll need to type the model ID yourself.
Add an OpenAI node to your workflow, select the 'Chat' operation, type in a test message, and click 'Test Step'. If you get a response back from the AI, your setup is complete.
OpenAI node shows 'Invalid API Key'
Check that the API Key is pasted correctly — make sure there are no extra spaces or line breaks before or after the key. Also confirm the Base URL ends with /v1, as this suffix is easy to miss.
Not sure which model ID to use
Visit SeaLink's /models page to browse all available models and their capability labels. Model IDs are case-sensitive, so we recommend copying them directly from the page to avoid typos.
'Model not found' error
This usually means one of two things: the model ID is misspelled, or the model isn't included in your current plan. Check the /models page for the exact spelling and availability.
