---
title: "Estimate Cost"
method: POST
path: "/v1/tts/nova/estimate"
tags: ["Voice AI Beta — Nova"]
---

# Estimate Cost

`POST /v1/tts/nova/estimate`

Estimate the character count and credit cost of a text **without creating a task**. Free — call it before `POST /v1/tts/nova`.
> **Rate limit:** 60 requests/minute

## Request body

- object
  - `content` string, required

## Response `200`

Estimate

- TtsEstimateWithCost
  - `characters` integer — Billable characters (encoder units ≈ UTF-8 bytes — ASCII = 1, most CJK = 3, emoji = 4)
  - `cost` integer — Credits this text would cost with this provider

## Other responses

- `400` — Content is required
- `429` — Rate limit exceeded

---

[API](https://skmtc.dev/genaipro/apis/genaipro-api.md) · [All operations](https://skmtc.dev/genaipro/apis/genaipro-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/genaipro/genaipro-api/revisions/91f814eaecbd/schema)