---
title: "Preview BTC trade fee"
method: GET
path: "/money/trades/btc/fee_preview"
tags: ["money", "trades", "customer-session"]
---

# Preview BTC trade fee

`GET /money/trades/btc/fee_preview`

## Request

- Base URL: `https://api.stablesea.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.stablesea.com/money/trades/btc/fee_preview`
- Auth: none declared

Returns the indicative platform fee, quantity and proceeds for a BTC trade. For a sell, btc_quantity lets the server calculate the notional from the asset quantity. This read does not place a trade or authorize execution.

## Query parameters

- `usdc_amount` string, required
- `direction` 'buy' | 'sell', required
- `btc_quantity` string

## Response `200`

OK

- TradesPreviewBtcTradeFeeOutput
  - `below_minimum` boolean
  - `estimated_quantity` string
  - `estimated_quantity_view` MoneyfmtMoneyAmountView
    - `float` number, double, required
    - `formatted` MoneyfmtFormattedMoneyAmountView, required
      - `compact` string, required
      - `currency_sign` string, required
      - `currency_sign_position` string, required
      - `full` string, required
    - `precise` string, required
    - `symbol` string, required
    - `zero` boolean, required
  - `fee` string
  - `fee_view` MoneyfmtMoneyAmountView
    - `float` number, double, required
    - `formatted` MoneyfmtFormattedMoneyAmountView, required
      - `compact` string, required
      - `currency_sign` string, required
      - `currency_sign_position` string, required
      - `full` string, required
    - `precise` string, required
    - `symbol` string, required
    - `zero` boolean, required
  - `gross_proceeds` string
  - `gross_proceeds_view` MoneyfmtMoneyAmountView
    - `float` number, double, required
    - `formatted` MoneyfmtFormattedMoneyAmountView, required
      - `compact` string, required
      - `currency_sign` string, required
      - `currency_sign_position` string, required
      - `full` string, required
    - `precise` string, required
    - `symbol` string, required
    - `zero` boolean, required
  - `net_proceeds` string
  - `net_proceeds_view` MoneyfmtMoneyAmountView
    - `float` number, double, required
    - `formatted` MoneyfmtFormattedMoneyAmountView, required
      - `compact` string, required
      - `currency_sign` string, required
      - `currency_sign_position` string, required
      - `full` string, required
    - `precise` string, required
    - `symbol` string, required
    - `zero` boolean, required
  - `rate_label` string
  - `trade_amount` string
  - `trade_amount_view` MoneyfmtMoneyAmountView
    - `float` number, double, required
    - `formatted` MoneyfmtFormattedMoneyAmountView, required
      - `compact` string, required
      - `currency_sign` string, required
      - `currency_sign_position` string, required
      - `full` string, required
    - `precise` string, required
    - `symbol` string, required
    - `zero` boolean, required

## Other responses

- `default`: Error response.

## Changes

- **2026-10-29** `e003c8a67b62`: 1 info
  - added the optional property `error/authorization` to the response with the `default` status
- **2026-10-17** `28e463bb4bdc`: 1 info
  - api tag `customer-session` added
- **2026-09-01** `f2d9f80610d9`: 1 info
  - added the optional property `error/api_client_id` to the response with the `default` status
- **2026-08-26** `533de842b808`: 1 warning
  - for the `query` request parameter `usdc_amount`, the maxLength was set to `64`

[Operation history](https://skmtc.dev/stablesea/apis/stable-sea-backend/changes/money/trades/btc/fee_preview/get.md)

---

[API](https://skmtc.dev/stablesea/apis/stable-sea-backend.md) - [All operations](https://skmtc.dev/stablesea/apis/stable-sea-backend/llms.txt) - [OpenAPI document](https://skmtc.dev/stablesea/apis/stable-sea-backend/revisions/772c80d83658?raw)