OpenResponses API

mistral.rs supports the OpenResponses API specification.

Endpoints

• POST /v1/responses - Create a response
• GET /v1/responses/{id} - Retrieve a response
• DELETE /v1/responses/{id} - Delete a response
• POST /v1/responses/{id}/cancel - Cancel a background response

Unsupported Parameters

The following parameters are accepted for API compatibility but will return errors if set to non-default values:

Parameter	Behavior
parallel_tool_calls	Only true or omitted is supported; false returns an error
max_tool_calls	Not supported; setting any value returns an error

mistral.rs Extensions

These additional parameters are available beyond the spec:

• stop - Stop sequences
• repetition_penalty - Token repetition penalty
• top_k - Top-k sampling
• grammar - Constrained generation grammar
• min_p - Min-p sampling
• dry_multiplier, dry_base, dry_allowed_length, dry_sequence_breakers - DRY sampling
• web_search_options - Web search integration

See HTTP.md for usage examples.