Every model on Replicate describes its inputs and outputs with OpenAPI Schema Objects in the openapi_schema property. This is a structured JSON object that includes the name, description, type, and allowed values for each input or output parameter.

Today we’ve improved our API reference documentation to clarify how to get a model’s input and output schema.

See the updated docs at https://replicate.com/docs/reference/http#models.versions.get

Here’s an example of how to get the input schema for Stable Diffusion using cURL:

Using this command, we can see all the inputs to Stable Diffusion, including their types, description, min and max values, etc:

And here’s a command to the get the output schema:

From this command, we can see that Stable Diffusion output format is a list of URL strings: