---
title: "Backend info, default params, and limits"
method: GET
path: "/v1/info"
tags: ["Meta"]
---

# Backend info, default params, and limits

`GET /v1/info`

## Response `200`

Successful Response

- InfoResponse
  - `backend` InfoBackend, required
    - `name` string, required
    - `kind` string, required
    - `ready` boolean, required
    - `sample_rate` integer, required
    - `detail` string, required
  - `defaults` GenParamsModel, required — Generation knobs, all optional — the defaults are the tuned production sampling, shared by every generation endpoint (served with UI ranges at GET /v1/info).
    - `temperature` number
    - `acoustic_temperature` number, nullable — Temperature for the voice's fine acoustic detail; null = follow `temperature`.
    - `top_k` integer, nullable — Sample from the k most-likely tokens; null = full vocabulary.
    - `max_new_tokens` integer, nullable — Optional generation cap; null uses the model's remaining context window.
    - `audio_quality` 'low' | 'medium' | 'high' — Playback fidelity: high = full quality (default); lower tiers reduce fidelity, not payload size.
  - `limits` InfoLimits, required
    - `max_text_chars` integer, required
    - `max_conversation_turns` integer, required
    - `max_audio_bytes` integer, required
    - `rate_limit_rpm` integer, required
    - `rate_limit_burst` integer, required
  - `param_schema` ParamSchemaEntry[], required — UI metadata for the generation parameters.
    - `key` string, required
    - `label` string, required
    - `type` 'slider' | 'select' | 'int', required
    - `help` string, required
    - `min` number
    - `max` number
    - `step` number
    - `nullable` boolean
    - `offLabel` string
    - `options` union[]
      - union
        - integer
        - string
    - `deprecated` boolean

## Other responses

- `401` — Missing or invalid API key.
- `500` — Unexpected internal error.
- `503` — API-key verification is temporarily unavailable.

---

[API](https://skmtc.net/kalpalabs/apis/kalpa-speech-api.md) · [All operations](https://skmtc.net/kalpalabs/apis/kalpa-speech-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/kalpalabs/kalpa-speech-api/versions/60add3abf640/schema)