OpenRouter Schemas

This is the JSON schema used to configure OpenRouter's dynamic model routing. Features:

• 🔀 Configure fallback models to handle moderation and downtime gracefully
• 🦹‍♀️ Create and share characters with custom prompts and parameters

WIP features:

• 🧠 Add memory to characters using embeddings (WIP)
• 👨‍👩‍👧‍👦 Configure a mixture-of-experts with open source models (WIP)

How to configure a route

OpenRouter will provide two ways to set a route:

Fallback route

In the request body to the OpenRouter API, you can set route to a string value. Only one option will exist at the beginning: "fallback":

{
  "model": "openai/gpt-4",
  "route": "fallback"
}

This route allows you to use an open source model (whatever OpenRouter thinks might be best for your primary model) as a fallback if:

1. Your primary model requires the use of a moderation model to avoid sending certain types of prompts
2. Our moderation model(s) flagged your prompt or system prompt for a specific reason.

You can also use list of models to indicate which models you'd like to try, in order (up to 3):

{
  "models": ["openai/gpt-4", "meta-llama/llama-2-70b-chat"],
  "route": "fallback"
}

If you don't specify models but you do specify route: "fallback", then OpenRouter will try to pick the most appropriate fallback model for you.

Custom JSON

You will also be able set route to a JSON object that conforms to this schema. See How to use this below.

How to use this

The current RFC draft schema is v1. To start your router, create a JSON file with:

{
  "$schema": "https://openrouter.ai/api/v1/router/schema.json"
}

You can then extend the schema and submit this JSON as your route. Here's an example.

Note: You should submit a single model config inside the models array unless you also want a mixture_of_experts. If the latter is unspecified and models.length > 1, you'll receive an error.

When will this be available?

Custom routers will go live after we receive feedback and suggestions. Please feel free to create an issue or open a PR directly on this repository to start the discussion!

You can also message us in Discord.

Model identifiers

Models must be identified by one of the /-separated strings in the OpenRouter docs, or a model identifier in Hugging Face format.