URL Parameters

List of parameters

Here is the list of parameters that can be added to the URL:

Parameter	Description
address	Address of the wallet you want to receive crypto to [Warning] In production, you must be a verified merchant to use this parameter, also a valid signature parameter should be present. Please contact our team for a KYB process.
network	Wallet network. Supported values: POLYGON, ETHEREUM, STELLAR, AVALANCHE, SOLANA, CELO, BASE, LISK
asset	Wallet asset. Supported values: USDC, CUSD, USDT, USDC_E, CKES depending on network. The default value is USDC for all networks that support it except CELO, for CELO it's CUSD. Supported network/asset pairs: AVALANCHE (USDC), POLYGON (USDC, USDC_E, USDT), CELO (CUSD, USDC, USDT, CKES), STELLAR (USDC), SOLANA (USDC), BASE (USDC), ETHEREUM (USDC), LISK (USDT)
memo	Memo for the transaction
amount	If a currency is not provided, it will be an amount of crypto received after fees. If currency is airtime, it will be the amount of airtime a user should spend.
minAmount	Minimum amount of order in crypto
currency	Currency of the amount. Supported values: airtime or usdc
country	default selected country iso code, example: KE for Kenya, NG for Nigeria
currencyIso	currency iso code, example: KES for Kenya, NGN for Nigeria. Acts like a country parameter.
freezeAmount	Freezes the amount of order for the user, the user will not be able to change it. The amount is required in the URL for this parameter to work.
freezeWallet	Freezes the wallet of order for the user, the user will not be able to change it. The wallet is required in the URL for this parameter to work. [Warning] In production, you must be a verified merchant to use this parameter, also a valid signature parameter should be present. Please contact our team for a KYB process.
provider	Default user funds source to select, supported values: carrier, mpesa, mobile_money, bank_transfer
carrier	id of a mobile carrier to select by default
callbackUrl	if present, "Back to website" link will be displayed on the success page. When a user clicks on it, we will redirect him to the provided URL. It supports placeholders which will be replaced by order data: {orderId}, {transactionHash}, {usdcAmount}, {airtimeAmount}, {network}, {address}. For example the next URL https://example.com/success/{orderId}/{usdcAmount} will be converted to something like https://example.com/success/648b3095a9f38d8b7b2da748/5.45. [Warning] provided URL should be encoded, example
callbackBtnText	Text of the button that is displayed when callbackUrl is provided. Default is: "Back to website"
phone	phone number to prefill the phone number fields
closeBtn	text of the button that will be displayed on the success page. If not provided, the button will not be displayed. On click, it will send a close-iframe iframe event, so an integrator can close the widget.
redirectUrl	if present, user will be redirected to this URL on order fail or success. It supports placeholders which will be replaced by order data: {orderId}, {transactionHash}, {usdcAmount}, {airtimeAmount}, {network}, {address}, {status}, {failReason}. {status} placeholder can the next values: success or fail. Fail reason placeholder can the next values: transaction_failure or agent_rejected. For example the next URL https://example.com/success/{orderId}/{usdcAmount} will be converted to something like https://example.com/success/648b3095a9f38d8b7b2da748/5.45. [Warning] provided URL should be encoded, example
quoteId	id of a quote returned from the price API request.
hideSwitch	if present, hides the Buy/Sell switch at the top

Parameters allowed only for registered merchants:

Parameter	Description
orderParams	This parameter will be sent to a merchant webhook after the success of the crypto transfer.
source	parameter used to match an order to a merchant if the merchant operates by a huge amount of wallets and can't provide them in the merchant dashboard. Merchants should request our support to assign a source to their accounts. [Warning] In production, you must be a verified merchant to use this parameter, also a valid signature parameter should be present. Please contact our team for a KYB process.

Here is an example of a URL with parameters:

https://pay.fonbnk.com?amount=1&network=POLYGON&asset=USDT