Workflow automation
How to use n8n with Rapid Router
n8n's OpenAI credential has a Base URL field. Create one credential for Rapid Router and every OpenAI node, AI Agent node and chat model node in your workflows can use catalog models.
Setup
- Credentials → New → OpenAI.
- API Key: your Rapid Router key. Base URL: the URL below.
- In an OpenAI Chat Model node, pick the credential and type the model string in the Model field (choose "By ID" if the list is empty).
Type: OpenAI
API Key: <your Rapid Router key>
Base URL: https://rapidrouter.ai/api/v1
Model: anthropic/claude-sonnet-5 (By ID)Field names as in n8n at the time of writing; their UI moves, the three values do not. n8n site.
Pick a model
The catalog lists every live model with its price per million tokens. For a coding tool, a strong model for edits and a cheap one for questions is the usual pair; the cost calculator shows what a month of your usage costs on each.
Common questions
Which model string do I put in n8n?
Any id from the catalog, in the vendor/model shape, for example anthropic/claude-sonnet-5. The models page lists every live id with its price; copy it exactly.
Does n8n need anything else to work with Rapid Router?
No. Rapid Router exposes the OpenAI chat completions API at https://rapidrouter.ai/api/v1, which is the shape n8n already sends. Streaming, tool calling and JSON mode work where the model supports them.
How is usage from n8n billed?
Per request at the provider's list price per million tokens, debited from your prepaid balance. Create a separate key for n8n and the dashboard shows its spend on its own; you can cap it monthly.
Is there a free allowance to test with?
Yes. Every account gets a daily allowance of free requests on eligible models before any top-up, so the first session costs nothing.