---
title: "Get refund gas fee"
method: POST
path: "/open-api/v3/cryptoconnect/refunds/fees"
tags: ["Blockchain Refund"]
---

# Get refund gas fee

`POST /open-api/v3/cryptoconnect/refunds/fees`

## Request

- Base URL: `https://api-sandbox.interlace.money`
- URL: `https://api-sandbox.interlace.money/open-api/v3/cryptoconnect/refunds/fees`
- Auth: API key in header `x-access-token`

Preview blockchain refund gas fee.

## Request body

- BlockchainRefundPreviewRequest
  - `currency` 'BTC' | 'ETH' | 'USDC' | 'USDT' | 'WUSD', required
  - `chain` 'ARB' | 'AVAX' | 'BASE' | 'BNB' | 'BTC' | 'ETH' | 'MATIC' | 'OP' | 'SOL' | 'TON' | 'TRX', required

## Response `200`

The request has succeeded.

- object
  - `code` string, required: Code
  - `message` string, required: Message
  - `data` RefundFee[], required: Data
    - `currency` 'BTC' | 'ETH' | 'USDC' | 'USDT' | 'WUSD', required
    - `amount` string, number, required: The transaction amount.
    - `type` 'GAS', required

## Other responses

- `400`: The server could not understand the request due to invalid syntax.

---

[API](https://skmtc.dev/interlace/apis/crypto-connect.md) - [All operations](https://skmtc.dev/interlace/apis/crypto-connect/llms.txt) - [OpenAPI document](https://skmtc.dev/interlace/apis/crypto-connect/revisions/9d40c2545370?raw)