Crypto Deposit Withdraw

Crypto Deposit Withdraw

Crypto Deposit Withdraw allows merchants to accept stablecoin deposits from users on supported blockchains and automatically convert them into fiat payouts. When a user sends crypto to the provided deposit address, Coinflow detects the deposit, converts it to USD, and initiates a payout to the user’s linked bank account or debit card.

This is ideal for platforms that want to offer crypto off-ramps without building and maintaining their own blockchain settlement infrastructure.

Supported Chains

Crypto Deposit Withdraw supports the following chains:

Production:

Sandbox:

Prerequisites

Before using Crypto Deposit Withdraw, ensure:

• The user has completed KYC verification
• The user has a linked payout destination (bank account or debit card)
• Your merchant account is configured for crypto withdrawals — contact the Coinflow integrations team to enable this feature

Integration

Get Supported Chains

Retrieve the list of supported blockchains and tokens. Use this to display available deposit options to your users.

$
GET /withdraw/crypto-deposit-address

Response:

1
{
2
  "chains": [
3
    {
4
      "name": "Polygon",
5
      "image": "https://example.com/polygon-logo.png",
6
      "tokens": [
7
        {
8
          "name": "USD Coin",
9
          "symbol": "USDC",
10
          "image": "https://example.com/usdc-logo.png"
11
        },
12
        {
13
          "name": "Tether USD",
14
          "symbol": "USDT",
15
          "image": "https://example.com/usdt-logo.png"
16
        }
17
      ]
18
    }
19
  ]
20
}

Create a Deposit Session

Create a deposit session to generate a deposit address for a user. The user sends stablecoins to this address — any amount is accepted — and once the deposit is confirmed, Coinflow automatically initiates the fiat payout for the value received.

$
POST /withdraw/crypto-deposit-address

Request Body:

Example Request:

1
{
2
  "account": "act_abc123",
3
  "speed": "asap",
4
  "chain": "Polygon",
5
  "token": "USDC"
6
}

Response:

1
{
2
  "depositAddress": "0x1234...abcd",
3
  "paymentChainName": "Polygon",
4
  "paymentCurrencySymbol": "USDC",
5
  "chainLogoUrl": "https://example.com/polygon-logo.png",
6
  "currencyLogoUrl": "https://example.com/usdc-logo.png"
7
}

Authentication

The Create Deposit Session endpoint requires both:

• Merchant authentication — Admin-level merchant API key
• User authentication — The user must be an approved withdrawer (via wallet auth or session key)

See User Identification for details on authenticating users for payouts.

Payout Lifecycle

Once a user sends tokens to the deposit address:

1. Deposit detected — Coinflow monitors the deposit address and detects the incoming transaction
2. Conversion — The stablecoins are converted to USD
3. Payout initiated — A fiat payout is automatically initiated to the user’s linked account at the specified speed
4. Payout completed — The user receives funds in their bank account or on their debit card

Supported Payout Speeds

All standard payout speeds are available with Crypto Deposit Withdraw. The speed parameter determines how quickly the user receives their fiat funds after the deposit is confirmed.

See Understanding Payout Speeds for full details.