Walkthroughs
Payments

Walkthrough: Payment APIs

The Fuze Pay API allows merchants to seamlessly accept and disburse cryptocurrency payments while ensuring compliance through built-in KYC and AML checks. This document provides a comprehensive walkthrough of core API calls—customer management, deposit wallets, payins, payouts, and account management.

API Environments

Fuze provides two primary environments for developers: Staging and Production. Each environment has its own base URL and purpose, ensuring you can safely test your integration before handling live transactions.

EnvironmentBase URLPurpose
Staginghttps://staging.api.fuze.finance (opens in a new tab)Used for testing and development. This environment often points to test networks(e.g., test blockchains) and allows you to validate integrations without real financial risk.

Common API Headers

The following headers are required across all API endpoints unless otherwise specified:

Header NameDescriptionExample
X-SIGNATUREDigital signature used for request authentication.d0f8e2c8...
X-TIMESTAMPUnix timestamp of the request to ensure the request is not stale.1687944000
X-API-KEYUnique API key for authorization.api_key_example12345
Content-TypeSpecifies the type of the content in the request body.application/json

This section applies globally to all APIs. Specific header usage will still be mentioned in individual API details if required.

Manage Customers

You can add a customer via the endpoint. You will need to pass kycData, and a unique clientIdentifier This clientIdentifier will be used to identify the counterparty in all future transactions.

Create Customer

Once you’ve uploaded the documents, you can create a customer using the following API

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/third-party/create/

Body Parameters

  • clientIdentifier (string, required): The unique identifier for the customer. Example: sherlockholmes.
  • sumsubToken (string, optional): In case we're using SumSub to share KYC information, you can pass this field.
  • kycData (object, required): KYC details for the customer, including:
    • fullName (string, required): Customer's full name. Example: sherlock holmes.
    • email (string, required): Customer's email. Example: sherlockholmes@baker.st.
    • entityType (string, required): Type of entity. Example: individual.
    • addressLine1 (string, required): Address line 1. Example: 221B.
    • addressLine2 (string, optional): Address line 2. Example: Baker St.
    • city (string, required): City. Example: London.
    • state (string, required): State. Example: London.
    • country (string, required): Country. Example: GB.
    • postalCode (string, required): Postal Code. Example: NW16XE.

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "email": "sherlockholmes@baker.st",
  "type": "THIRD_PARTY",
  "sumsubToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJjbGllbnRfaWQiLCJleHAiOjE2ODAwMDAwMDAsImlhdCI6MTY4MDAwMDAwMCwiaXNzIjoic3Vtc3ViIn0.W6lTRbXMDmsoVqPyVduVn2Tr3EEdkgJEsnR69G1d9CQ",
  "kycData": {
    "fullName": "sherlock holmes",
    "entityType": "individual",
    "email": "sherlockholmes@baker.st",
    "addressLine1": "221B",
    "addressLine2": "Baker St",
    "city": "London",
    "state": "London",
    "country": "GB",
    "postalCode": "NW16XE"
  }
}

Success response

{
  "code": 200,
  "data": {
    "name": "sherlock holmes",
    "email": "sherlockholmes@baker.st",
    "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
    "type": "THIRD_PARTY",
    "status": "PENDING",
    "clientIdentifier": "sherlockholmes",
    "createdAt": "2025-01-14T09:44:13.246Z"
  },
  "error": null
}

Customer lifecycle webhooks

Based on the customer lifecycle events you’ll receive the following webhooks.

Account Approved

After the account is approved, you can start creating payins and payouts.

{
  "event": {
    "orgId": 10,
    "entity": "ThirdParties",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
    "status": "ACTIVE",
    "reason": null
  }
}

Compliance Follow Up

In case the Fuze compliance team needs further information/clarifications, you’ll receive this webhook. You’ll receive reasons for rejection along with the documents which had problems. To solve this, you need to resolve it with our compliance team offline.

{
  "event": {
    "orgId": 10,
    "entity": "ThirdParties",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
    "status": "PENDING",
    "reason": "Further due diligence required"
  }
}

Account Rejected

In case we can’t accept the customer due to our compliance guidelines, you’ll receive this error. No further action can be taken to approve this customer.

{
  "event": {
    "orgId": 10,
    "entity": "ThirdParties",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
    "status": "FAILED",
    "reason": "Rejected due to compliance reasons."
  }
}

Account Suspended

No further action can be taken on the account. All customer details would be reported to relevant local authorities. Examples of this action include cases where the funds end up in a sanctioned entity, or if the wallet added for whitelisting was tied to terrorist financing or sanctioned entities.

{
  "event": {
    "orgId": 10,
    "entity": "ThirdParties",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
    "status": "INACTIVE",
    "reason": "Rejected due to AML checks."
  }
}

Fetch a Customer

You can retrieve customer details using the following API. This allows you to check the current status, KYC information, and associated documents of a specific customer.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/third-party/

Body Parameters

  • clientIdentifier (string, required) - The unique identifier of the customer you want to fetch. Example: sherlockholmes

Request Body

{
  "clientIdentifier": "sherlockholmes"
}

Success Response

{
  "code": 200,
  "data": {
    "name": "sherlock holmes",
    "email": "sherlockholmes@baker.st",
    "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
    "type": "THIRD_PARTY",
    "status": "ACTIVE",
    "clientIdentifier": "sherlockholmes",
    "createdAt": "2025-01-22T04:32:46.242Z"
  },
  "error": null
}

Error Response

{
  "code": 404,
  "data": null,
  "error": "Not Found"
}

Fetch all Customers

You can retrieve customers list using the following API. This endpoint supports limit-offset pagination.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/third-party/list

Body Parameters

  • pageSize (number, optional, default: 50, max: 100): Number of records per page. Example: 50
  • pageNumber (number, optional): Page number with starting index as 0. Example: 0

Request Body

{
  "pageNumber": 0,
  "pageSize": 10
}

Success Response

{
  "code": 200,
  "data": [
    {
      "name": "sherlock holmes",
      "email": "sherlockholmes@baker.st",
      "uuid": "0120792e-323a-4e02-b951-1abbb44bf550",
      "type": "THIRD_PARTY",
      "status": "ACTIVE",
      "clientIdentifier": "sherlockholmes",
      "createdAt": "2025-01-14T09:52:06.203Z"
    },
    {
      "name": "dr watson",
      "email": "watson@baker.st",
      "uuid": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae4",
      "type": "THIRD_PARTY",
      "status": "ACTIVE",
      "clientIdentifier": "watson",
      "createdAt": "2025-01-14T09:52:06.203Z"
    }
  ],
  "error": null
}

Deposit Wallets

A client can have multiple wallets for depositing different currencies. The following APIs help you create and manage deposit wallets.

Create a Wallet

Using this API you can create a customer wallet which can be later used to receive client funds. If the wallet already exists for a symbol, then the same will be returned to you.

Conversion currency

While creating a wallet you can optionally specify a fiat conversion currency tied to that wallet. So any funds deposited in that wallet will be converted to the specified currency and settled with you. For example, if you mention the symbol as "USDC_USD", then the customer can deposit USDC in the returned wallet, which will be automatically converted to USD.

You can specify a crypto without a fiat conversion currency if you like to receive crypto directly. For example, specifying symbol as "USDC" will allow the customers to deposit crypto and the same will be settled with you without any conversions.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/third-party/deposit-wallet/create

Body Parameters

  • clientIdentifier (string, required): The unique identifier for the customer. Example: sherlockholmes.
  • symbol (string, required): The cryptocurrency and fiat currency pair. Example: USDC_USD.
  • chain (string, required): The blockchain on which the wallet will be created. Example: POLYGON.

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "symbol": "USDC_USD",
  "chain": "POLYGON"
}

Success Response

{
  "code": 200,
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "asset": "USDC",
    "status": "APPROVED",
    "createdAt": "2025-01-14T09:50:22.539Z",
    "symbol": "USDC_USD"
  },
  "error": null
}

Here is a list of supported crypto currencies along with their chains

Crypto CurrenciesSymbolSupported Blockchains
TetherUSDTEthereum, Tron*
USD CoinUSDCPolygon, Ethereum, Tron
EthereumETHEthereum
BitcoinBTCBitcoin
SolanaSOLSolana

* USDT is only available on mainnets.

Wallet lifecycle webhooks

Wallet Disabled

When a wallet is found to be associated with suspicious activities or blacklisted addresses, it will be disabled and a new wallet address will be generated automatically.

Webhook Event: UserWallets.INACTIVE

{
  "event": {
    "orgId": 10,
    "entity": "UserWallets",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "symbol": "USDC_USD",
    "chain": "POLYGON",
    "network": "AMOY",
    "status": "INACTIVE",
    "createdAt": "2025-01-14T09:50:22.539Z"
  }
}

List Wallets

This API allows you to fetch all wallets associated with a specific customer.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/third-party/depoit-wallet/list

Body Parameters

clientIdentifier: The unique identifier of the customer. Example: sherlockholmes.

Request Body

{
    "clientIdentifier": "sherlockholmes"
}

Success Response

{
  "code": 200,
  "data": [
    {
      "clientIdentifier": "sherlockholmes",
      "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
      "chain": "POLYGON",
      "network": "AMOY",
      "symbol": "USDC_USD",
      "status": "ACTIVE",
      "createdAt": "2025-01-14T09:50:22.539Z"
    },
    {
      "clientIdentifier": "sherlockholmes",
      "address": "0x7d3e8b7d8d1f3f1f3f1f3f1f3f1f3f1f3f1f3f1f",
      "chain": "ETHEREUM",
      "network": "SEPOLIA",
      "symbol": "USDC_USD",
      "status": "INACTIVE",
      "createdAt": "2025-01-14T09:50:22.539Z"
    }
  ],
  "error": null
}

Notes

  • The status field indicates whether the wallet is currently active or inactive.

Payins

To accept Payins, share the deposit wallet address received in the deposit wallet creation API call with the customer. Once the customers transfer funds to their respective wallet address, webhooks are triggered at each stage of the transaction lifecycle.

Payin lifecycle webhooks

When a customer transfers funds, you'll receive webhooks at different stages of the transaction. Here are the possible webhook events:

Payin creation

When a payin is created with Fuze, we will send a webhook.

Webhook Event: Payins.CREATED

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "CREATED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Transaction recorded on Blockchain

When the transaction is detected on the blockchain, we will notify you.

Webhook Event: Payins.TXN_CREATED

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "TXN_CREATED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Transaction Initiated

When a customer initiates a transfer, we start the AML check and notify you.

Webhook Event: Payins.INITIATED

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "INITIATED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Transaction Confirmed

After all checks pass successfully, you'll receive a confirmation webhook.

Webhook Event: Payins.PAID

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "PAID",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

If the received amount is less than the expected amount, you'll receive a webhook with the status UNDERPAID.

Webhook Event: Payins.UNDERPAID

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "UNDERPAID",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 500,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 500,
    "quoteQuantity": 501.1,
    "expiryTime": 1736849148122
  }
}

If the received amount is more than the expected amount, you'll receive a webhook with the status OVERPAID.

Webhook Event: Payins.OVERPAID

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "OVERPAID",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 2000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 2000.0,
    "quoteQuantity": 2011.0,
    "expiryTime": 1736849148122
  }
}

Compliance Review Required

If a transaction is flagged by our automated AML checks, it undergoes manual compliance review.

Webhook Event: Payins.COMPLIANCE_REVIEW

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "COMPLIANCE_REVIEW",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Additional Information Required

The customer is contacted for further clarifying information - on the basis of which a final decision will be made (whether to return, freeze or allow it to be processed).

Webhook Event: Payins.RFI

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "RFI",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Transaction Rejected

Customers would be told that funds cannot be processed from the specific wallet used and need to be returned. In such cases, the customer would need to be contacted to get a wallet address to which funds can be sent. Examples of cases where this measure is taken: For indirect exposures like scam, gambling (depending on jurisdiction) etc. which are above minimum thresholds for Fuze.

Webhook Event: Payins.REJECTED

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "REJECTED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Funds Frozen

If a customer / wallet is on a sanctioned list, then the funds will be frozen and no further action can be taken on the account. All customer details would be reported to relevant local authorities. Examples of cases where this measure is taken: For direct exposures to sanctioned entities, known terrorist wallets, etc.

Webhook Event: Payins.FROZEN

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayins",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "FROZEN",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Webhook Summary

StatusDescription
CREATEDPayin created by Fuze.
TXN_CREATEDTransaction is recorded on the blockchain.
INITIATEDTransaction initiated and AML check started.
COMPLIANCE_REVIEWTransaction flagged for manual compliance review.
RFIAdditional information requested by compliance team.
REJECTEDTransaction rejected, funds to be returned.
FROZENFunds have been frozen.
PAIDTransaction successfully completed.
UNDERPAIDTransaction successfully completed (received amount < expected amount).
OVERPAIDTransaction successfully completed (received amount > expected amount).

Notes

  • quantity, quoteQuantity and expiryTime fields will only be present in case fiat to crypto conversion is required for the merchant.
  • symbol will be of the type <crypto>_<fiat>, e.g. USDC_USD, if currency conversion is applicable for the deposit wallet. Otherwise, it will be of the type <crypto>, e.g. USDC.

Create a Payin Quote(Optional)

You can use this API in scenarios where you want to request a quote for an exact amount. For example, you want to receive 100 USD from the customer and the customer will be paying in USDC, then we'll return the exact amount in USDC customer needs to deposit so that you receive 100 USD. The quote will have an expiry time after which the quote will be updated to reflect the latest rates. If the customer pays after the quote has expired then the transaction will go through but the final amount received by you might be different, in case the conversion rate has changed.

The response of the transaction will be OPEN - indicating the the request have been received successfully. You will also receive a id and a wallet address

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payin/create HTTP/1.1

Body Parameters

  • clientIdentifier: The counterparty identifier you passed while creating the counterparty.
  • symbol: The currency to request payment in.
  • quantity: The amount of the payment.
  • chain: The blockchain to use for the transaction.
  • clientOrderId: Optional idempotency key which ensures the same order is not placed twice.

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "symbol": "USDC_USD",
  "chain": "POLYGON",
  "quantity": 1000,
  "clientOrderId": "5468bbb7-5e5f-425c-a6eb-b89e19a0298a"
}

Success Response

{
  "code": 200,
  "data": {
    "id": 107,
    "clientIdentifier": "sherlockholmes",
    "clientOrderId": "5468bbb7-5e5f-425c-a6eb-b89e19a0298a",
    "orgId": 28,
    "symbol": "USDC_USD",
    "address": "0x8f8e8b3b8b1f3f1f3f1f3f1f3f1f3f1f3f1f3f1f",
    "chain": "POLYGON",
    "network": "AMOY",
    "status": "CREATED",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "quantity": 1000,
    "quoteQuantity": 1000,
    "expiryTime": "2023-06-09T07:53:12.658Z"
  },
  "error": null
}

Notes

  • A successful response will contain clientOrderId which can be used to fetch the status of the payin.

List Payins

This API allows you to fetch a list of all Payins for a specific customer.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payin/list/

Body Parameters

  • clientIdentifier (string, optional): The unique identifier of the customer. Example: sherlockholmes
  • startDateand endDate (string, optional, format: UTC): Filter by date range. Example: 2023-06-08
  • status (string, optional): Filter by status Example: PAID, INITIATED, REJECTED
  • pageSize (number, optional, default: 50, max: 100): Number of records per page. Example: 50
  • pageNumber (number, optional): Page number with starting index as 0. Example: 0

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "startDate": "2023-06-08",
  "endDate": "2023-06-09",
  "pageSize": 10,
  "pageNumber": 0
}

Success Response

{
  "code": 200,
  "data": [
    {
      "clientOrderId": "58cde2c6-12a4-4981-94e3-e77a5145d050",
      "status": "PAID",
      "createdAt": "2025-01-14T10:19:45.680Z",
      "symbol": "USDC_USD",
      "amount": 1000.0,
      "receivedAmount": 1000.0,
      "fee": 0.001,
      "vat": 0.00005,
      "targetName": "sherlock holmes"
    },
    {
      "clientOrderId": "56c48192-5fee-47eb-96d6-fb9ce6fa79d3",
      "status": "QUOTE_EXPIRED",
      "createdAt": "2025-01-14T10:17:27.539Z",
      "symbol": "USDC",
      "amount": 1000.0,
      "receivedAmount": 0,
      "fee": 0.1,
      "vat": 0.005,
      "targetName": "sherlock holmes"
    }
  ],
  "error": null
}

Fetch a Payin

This API allows you to fetch the status of a specific Payin using its clientOrderId.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payin/status/

Body Parameters

  • clientOrderId: The unique ID of the Payin

Request Body

{
  "clientOrderId": "9c99dd8e-6b76-45ce-9468-d141dabbf0e9"
}

Success Response

{
  "code": 200,
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x54556F0ed90Fb6CEBb2201E31287b3478716B933",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "9c99dd8e-6b76-45ce-9468-d141dabbf0e9",
    "status": "PAID",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.0011,
    "vat": 0.000055,
    "quantity": 0.1,
    "quoteQuantity": 0.11,
    "expiryTime": 1736849148122
  },
  "error": null
}

Payouts

You can deposit funds in the customer's wallet from your own account using the Payout API.

Create a Payout Quote (optional)

You should generate a Payout quote if you wish to transfer fiat to the customer.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payout/quote

Body Parameters

  • clientIdentifier (string): The customer identifier. Example: sherlockholmes
  • symbol (string): Crypto currency to transfer. Example: USDC
  • chain (string): The blockchain to use for the transaction. Example: POLYGON
  • quantity (number, optional): Amount of crypto to transfer to the customer.
  • quoteQuantity (number, optional): Amount of fiat to transfer to the customer.

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "symbol": "USDC_USD",
  "chain": "POLYGON",
  "quantity": 1
}

Success Response

{
  "code": 200,
  "data": {
    "clientIdentifier": "sherlockholmes",
    "quoteId": 556851,
    "symbol": "USDC_AED",
    "quantity": 1,
    "quoteQuantity": 1.1,
    "price": 1.1,
    "expiryTime": 1736852639292
  },
  "error": null
}

Notes

  • Either quantity or quoteQuantity must be specified in request body for quote generation.
  • Successful response will return quoteId field, which will be used in the create Payout API.

Create a Payout

You can initiate a Payout using the following API.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payout/create

Body Parameters

  • clientIdentifier (string): The counterparty identifier you passed while creating the counterparty. Example: sherlockholmes
  • address (string): The address to send the payout to.
  • chain (string): The blockchain to use for the transaction. Example: POLYGON
  • symbol (string): Crypto currency to transfer. Example: USDC
  • clientOrderId (string, optional): Idempotency key of the type uuid v4, which ensures the same order is not placed twice. Fuze will generate a random uuid if not supplied.
  • quantity (number, optional): Amount of crypto to transfer to the customer.
  • quoteId (number, optional): Quote ID received from Payout Quote creation API.

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "address": "0x98BCBd9Bd0896A73d5aa0cC880512a3cBCE78401",
  "chain": "POLYGON",
  "symbol": "USDC",
  "quantity": 1
}

Success Response

{
  "code": 200,
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x98BCBd9Bd0896A73d5aa0cC880512a3cBCE78401",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "c43b2dad-03a0-4d84-9f4b-b5a0cf9cc55b",
    "status": "CREATED",
    "symbol": "USDC",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1,
    "quoteQuantity": 1,
    "expiryTime": 1736853306929
  },
  "error": null
}

Notes

  • One of quoteId or quantity must be specified in the request body. Specify quoteId if you wish to transfer fiat to the customer. If the customer is to be paid in crypto, pass quantity.

Payout lifecycle webhooks

Here are the webhook events you'll receive during a payout lifecycle. Each webhook will contain relevant transaction details and a status update. We’ve covered more details about our web-hooks here (opens in a new tab).

1. Payout Initiated

When a payout request is initiated, you'll receive this event confirming the request has been received and validated.

 
{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayouts",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "INITIATED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

2. Payout Paid

This event indicates the payout transaction has been submitted to the blockchain and is being processed.

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayouts",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "PAID",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

3. Payout Settled

This event confirms the funds have been received in the destination wallet. You’ll receive the transaction hash, transaction fees and network fees.

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayouts",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "SETTLED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

4. Payout Failed

This event indicates the payout could not be completed.

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayouts",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "FAILED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

5. Compliance Review Required

This event indicates the destination wallet requires a manual compliance review. The funds will be blocked and the transaction will either be completed or rejected post compliance review.

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayouts",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "COMPLIANCE_REVIEW",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

6. Wallet Rejected

This event indicates the destination wallet was rejected by compliance and the payout will be cancelled. You’ll have to initiate a payout with another wallet address.

{
  "event": {
    "orgId": 10,
    "entity": "GatewayPayouts",
    "numRetries": 0,
    "updatedAt": "2023-12-14T12:35:02.894Z",
    "createdAt": "2023-12-14T12:35:02.894Z"
  },
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x51980d9a87f5de7e1DcdBe2284C39D96eC4C4361",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "47e3bf05-1a91-4f3e-a6b4-3ac99c82eae3",
    "status": "REJECTED",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.01,
    "vat": 0.0005,
    "quantity": 1000.0,
    "quoteQuantity": 1011.0,
    "expiryTime": 1736849148122
  }
}

Fetch a Payout

This API allows you to fetch the status of a specific Payin using its clientOrderId.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payout/status/

Body Parameters

  • clientOrderId (string): The unique ID of the Payout

Request Body

{
  "clientOrderId": "d91ce7f7-1445-4e23-bfa0-edcb1e69a2f3"
}

Success Response

{
  "code": 200,
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x5A047dAc44Da3fd4dc7C038aCFD952C70D41781b",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "d91ce7f7-1445-4e23-bfa0-edcb1e69a2f3",
    "status": "PAID",
    "symbol": "USDC_USD",
    "amount": 1000.0,
    "receivedAmount": 1000.0,
    "fee": 0.005,
    "vat": 0.00025,
    "quantity": 1,
    "quoteQuantity": 1.1,
    "expiryTime": 1736861661251
  },
  "error": null
}

List Payouts

To get a list of payouts you can use the following API along with the body parameters.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payout/list

Body Parameters

  • clientIdentifier (optional, string): The unique identifier of the customer. Example: sherlockholmes
  • startDateand endDate (optional, string, format: UTC): Filter by date range. Example: 2023-06-08
  • status (optional, string): Filter by status Example: PAID, INITIATED, REJECTED
  • pageSize (number, optional, default: 50, max: 100): Number of records per page. Example: 50
  • pageNumber (number, optional): Page number with starting index as 0. Example: 0

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "startDate": "2023-06-08",
  "endDate": "2023-06-09",
  "pageSize": 10,
  "pageNumber": 0
}

Success Response

{
  "code": 200,
  "data": [
    {
      "clientOrderId": "c43b2dad-03a0-4d84-9f4b-b5a0cf9cc55b",
      "status": "PAID",
      "createdAt": "2025-01-14T12:07:22.950Z",
      "symbol": "USDC_USD",
      "amount": 1000.0,
      "receivedAmount": 1000.0,
      "fee": 0.0001,
      "vat": 0.000005,
      "targetName": "sherlock holmes"
    },
    {
      "clientOrderId": "6403745e-d55a-4709-b9f7-8f770db095a6",
      "status": "SETTLED",
      "createdAt": "2025-01-14T11:59:03.751Z",
      "symbol": "USDC",
      "amount": 1000.0,
      "receivedAmount": 1000.0,
      "fee": 0.0001,
      "vat": 0.000005,
      "targetName": "sherlock holmes"
    }
  ],
  "error": null
}

Processing Refunds

You can process refunds using the Payout creation API. The request structure is same along with an additional parameter - parentClientOrderId. This field is the clientOrderId of the Payin for which a refund is to be initiated. You can process refunds for Payins in COMPLETED or REJECTED status.

Endpoint

POST https://staging.api.fuze.finance/api/v1/payment/gateway/payout/create

Body Parameters

  • clientIdentifier (string): The counterparty identifier you passed while creating the counterparty. Example: sherlockholmes
  • address (string): The address to send the payout to.
  • chain (string): The blockchain to use for the transaction. Example: POLYGON
  • symbol (string): Crypto currency to transfer. Example: USDC
  • parentClientOrderId (string): ClientOrderId of the payin, for which a refund is to be created.
  • clientOrderId (string, optional): Idempotency key of the type uuid v4, which ensures the same order is not placed twice. Fuze will generate a random uuid if not supplied.
  • quantity (number, optional): Amount of crypto to transfer to the customer.
  • quoteId (number, optional): Quote ID received from Payout Quote creation API.

Request Body

{
  "clientIdentifier": "sherlockholmes",
  "symbol": "USDC_USD",
  "address": "0x5A047dAc44Da3fd4dc7C038aCFD952C70D41781b",
  "chain": "POLYGON",
  "clientOrderId": "5468bbb7-5e5f-425c-a6eb-b89e19a0298a",
  "quoteId": 567890,
  "parentClientOrderId": "d91ce7f7-1445-4e23-bfa0-edcb1e69a2f3"
}

Success Response

{
  "code": 200,
  "data": {
    "clientIdentifier": "sherlockholmes",
    "address": "0x5A047dAc44Da3fd4dc7C038aCFD952C70D41781b",
    "chain": "POLYGON",
    "network": "AMOY",
    "clientOrderId": "d91ce7f7-1445-4e23-bfa0-edcb1e69a2f3",
    "status": "PAID",
    "symbol": "USDC_USD",
    "amount": 1.0,
    "receivedAmount": 1.0,
    "fee": 0.005,
    "vat": 0.00025,
    "quantity": 1,
    "quoteQuantity": 1.1,
    "expiryTime": 1736861661251
  },
  "error": null
}

The refund process follows the same webhook lifecycle as regular payouts, with status updates being sent to your webhook endpoint as the refund progresses through various stages.

Account Management

Merchants can manage and monitor their fiat accounts through these endpoints. They allow you to:

  • Check Balances of different fiat currencies in which your funds are received.
  • List Transactions (fiat deposits to and withdrawals from your bank account), separate from the Payin/Payout flows described earlier.

Check Balances

Use this endpoint to retrieve the balances for all fiat currencies associated with your account.

Endpoint

GET https://staging.api.fuze.finance/api/v1/payment/gateway/account/balances

Success Response

{
  "code": 200,
  "data": [
    {
      "currency": "USD",
      "balance": 10500.75
    },
    {
      "currency": "AED",
      "balance": 2500.00
    },
    {
      "currency": "EUR",
      "balance": 1800.50
    }
  ],
  "error": null
}

Error Example

{
  "code": 403,
  "data": null,
  "error": "Unauthorized"
}
OtcRemittance