Will frequent triggers get rate limited?

Exceeding the rate or concurrency limit returns 429. Enable retries on the node and keep concurrency down.

Can I see what one flow costs?

Give the flow its own key, then filter usage by that key.

Connect n8n

Updated 2026-09-23

General automation platform; its built-in OpenAI node accepts a custom endpoint.

Use cases

Good for calling models from general automations: use the built-in OpenAI node pointed at this platform to generate, classify or summarize text in any flow.

Tips

Workflows call models in bulk and unattended. Set a monthly spend limit on the key and watch the failure rate in usage.

If it cannot connect

Use https://omnimodel.me/v1 as the API host, without /chat/completions.
The key starts with key_ and is not paused or revoked; auth.invalid_key means the key cannot be used.
The model ID matches the catalog and is in the key's allowed models.
billing.insufficient_credit means the balance is too low; see common errors for more.

Setup

Create an OpenAI credential with the API key and base URL below.
Add an OpenAI node to the workflow and select that credential.
Set the model field to the model ID you want.

Settings

API host：https://omnimodel.me/v1
API key：YOUR_API_KEY
Model：MODEL_ID

FAQ

Will frequent triggers get rate limited?: Exceeding the rate or concurrency limit returns 429. Enable retries on the node and keep concurrency down.
Can I see what one flow costs?: Give the flow its own key, then filter usage by that key.