---
title: "Estimate generation credits"
method: POST
path: "/api/credits/estimate"
tags: ["Asset"]
---

# Estimate generation credits

`POST /api/credits/estimate`

## Request

- Base URL: `https://makefx.app`
- URL: `https://makefx.app/api/credits/estimate`
- Auth: one of:
  - OAuth 2 (authorization code, authorization URL `https://makefx.app/api/oauth/authorize`, token URL `https://makefx.app/api/oauth/token`, scopes: `read`)
  - API key in cookie `auth_token`

Validates and prices one generation request without reserving credits.

## Headers

- `API-Version` '2026-09-10'

## Request body

- object
  - `space_id` string
  - `kind` 'image' | 'video' | 'audio', required
  - `model` string, required
  - `prompt` string
  - `references` object[]
    - `asset_id` string, required
    - `slot` string, required
    - `order` integer
  - `params` object
  - `count` integer
  - `from_asset_id` string
  - `recipe_mode` 'current' | 'exact'

## Response `200`

Success

- object
  - `credits` integer, required
  - `per_asset_credits` integer, required
  - `terms` string, required
  - `balance_credits` integer, required
  - `balance_after_credits` integer, required
  - `topup_url` string, uri

## Other responses

- `400`: The request did not match the schema
- `401`: No valid credentials. WWW-Authenticate names the protected resource metadata to start from
- `403`: The credentials are valid but not enough: the token lacks the scope, or the action needs a browser session rather than an app token
- `404`: Not found
- `429`: Rate limited. RateLimit names the policy; Retry-After says when to try again
- `500`: Internal server error

---

[API](https://skmtc.dev/makefx/apis/makefx-app-api.md) · [All operations](https://skmtc.dev/makefx/apis/makefx-app-api/llms.txt) · [OpenAPI document](https://skmtc.dev/makefx/apis/makefx-app-api/revisions/a05584da31c6?raw)