Get Transaction Fee

curl --request POST \
  --url https://api.rolla.xyz/api/v1/external/wallet/fee \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "currency": "NGN",
  "amount": 5000,
  "recipientCurrency": "NGN",
  "withdrawal_method": "ach",
  "destination_country": "US",
  "beneficiaryId": "c3d4e5f6-a7b8-9012-cdef-123456789012"
}
'

import requests

url = "https://api.rolla.xyz/api/v1/external/wallet/fee"

payload = {
    "currency": "NGN",
    "amount": 5000,
    "recipientCurrency": "NGN",
    "withdrawal_method": "ach",
    "destination_country": "US",
    "beneficiaryId": "c3d4e5f6-a7b8-9012-cdef-123456789012"
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    currency: 'NGN',
    amount: 5000,
    recipientCurrency: 'NGN',
    withdrawal_method: 'ach',
    destination_country: 'US',
    beneficiaryId: 'c3d4e5f6-a7b8-9012-cdef-123456789012'
  })
};

fetch('https://api.rolla.xyz/api/v1/external/wallet/fee', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.rolla.xyz/api/v1/external/wallet/fee",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'currency' => 'NGN',
    'amount' => 5000,
    'recipientCurrency' => 'NGN',
    'withdrawal_method' => 'ach',
    'destination_country' => 'US',
    'beneficiaryId' => 'c3d4e5f6-a7b8-9012-cdef-123456789012'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.rolla.xyz/api/v1/external/wallet/fee"

	payload := strings.NewReader("{\n  \"currency\": \"NGN\",\n  \"amount\": 5000,\n  \"recipientCurrency\": \"NGN\",\n  \"withdrawal_method\": \"ach\",\n  \"destination_country\": \"US\",\n  \"beneficiaryId\": \"c3d4e5f6-a7b8-9012-cdef-123456789012\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-Key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.rolla.xyz/api/v1/external/wallet/fee")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"currency\": \"NGN\",\n  \"amount\": 5000,\n  \"recipientCurrency\": \"NGN\",\n  \"withdrawal_method\": \"ach\",\n  \"destination_country\": \"US\",\n  \"beneficiaryId\": \"c3d4e5f6-a7b8-9012-cdef-123456789012\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.rolla.xyz/api/v1/external/wallet/fee")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"currency\": \"NGN\",\n  \"amount\": 5000,\n  \"recipientCurrency\": \"NGN\",\n  \"withdrawal_method\": \"ach\",\n  \"destination_country\": \"US\",\n  \"beneficiaryId\": \"c3d4e5f6-a7b8-9012-cdef-123456789012\"\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "message": "Transaction fee retrieved successfully",
  "data": {
    "fee": {
      "amount": 50,
      "currency": "NGN",
      "feeInRecipientCurrency": 75000
    }
  }
}

{
  "success": false,
  "message": "<string>"
}

{
  "success": false,
  "message": "<string>"
}

POST

wallet

fee

Get Transaction Fee

curl --request POST \
  --url https://api.rolla.xyz/api/v1/external/wallet/fee \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "currency": "NGN",
  "amount": 5000,
  "recipientCurrency": "NGN",
  "withdrawal_method": "ach",
  "destination_country": "US",
  "beneficiaryId": "c3d4e5f6-a7b8-9012-cdef-123456789012"
}
'

import requests

url = "https://api.rolla.xyz/api/v1/external/wallet/fee"

payload = {
    "currency": "NGN",
    "amount": 5000,
    "recipientCurrency": "NGN",
    "withdrawal_method": "ach",
    "destination_country": "US",
    "beneficiaryId": "c3d4e5f6-a7b8-9012-cdef-123456789012"
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    currency: 'NGN',
    amount: 5000,
    recipientCurrency: 'NGN',
    withdrawal_method: 'ach',
    destination_country: 'US',
    beneficiaryId: 'c3d4e5f6-a7b8-9012-cdef-123456789012'
  })
};

fetch('https://api.rolla.xyz/api/v1/external/wallet/fee', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.rolla.xyz/api/v1/external/wallet/fee",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'currency' => 'NGN',
    'amount' => 5000,
    'recipientCurrency' => 'NGN',
    'withdrawal_method' => 'ach',
    'destination_country' => 'US',
    'beneficiaryId' => 'c3d4e5f6-a7b8-9012-cdef-123456789012'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.rolla.xyz/api/v1/external/wallet/fee"

	payload := strings.NewReader("{\n  \"currency\": \"NGN\",\n  \"amount\": 5000,\n  \"recipientCurrency\": \"NGN\",\n  \"withdrawal_method\": \"ach\",\n  \"destination_country\": \"US\",\n  \"beneficiaryId\": \"c3d4e5f6-a7b8-9012-cdef-123456789012\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-Key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.rolla.xyz/api/v1/external/wallet/fee")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"currency\": \"NGN\",\n  \"amount\": 5000,\n  \"recipientCurrency\": \"NGN\",\n  \"withdrawal_method\": \"ach\",\n  \"destination_country\": \"US\",\n  \"beneficiaryId\": \"c3d4e5f6-a7b8-9012-cdef-123456789012\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.rolla.xyz/api/v1/external/wallet/fee")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"currency\": \"NGN\",\n  \"amount\": 5000,\n  \"recipientCurrency\": \"NGN\",\n  \"withdrawal_method\": \"ach\",\n  \"destination_country\": \"US\",\n  \"beneficiaryId\": \"c3d4e5f6-a7b8-9012-cdef-123456789012\"\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "message": "Transaction fee retrieved successfully",
  "data": {
    "fee": {
      "amount": 50,
      "currency": "NGN",
      "feeInRecipientCurrency": 75000
    }
  }
}

{
  "success": false,
  "message": "<string>"
}

{
  "success": false,
  "message": "<string>"
}

Calculate the fee for a given transaction type, currency, and amount before executing the transaction.

Example Request

curl -X POST "https://api.rolla.xyz/api/v1/external/wallet/fee" \
  -H "X-API-Key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "currency": "NGN",
    "transactionType": "withdrawal",
    "amount": 5000
  }'

Example Response

{
  "status": 200,
  "success": true,
  "message": "Transaction fee retrieved successfully",
  "data": {
    "fee": {
      "amount": 50,
      "currency": "NGN"
    }
  }
}

Parameters

Parameter	Type	Required	Description
`currency`	string	Yes	3-letter code of the wallet being debited
`transactionType`	string	Yes	`deposit`, `withdrawal`, or `swap`
`amount`	number	Yes	Amount in the smallest unit (kobo for NGN, cents for USD)
`recipientCurrency`	string	No	For FX payouts — the currency the beneficiary receives
`withdrawal_method`	string	No	The payout rail to price — see below
`destination_country`	string	No	2-letter country code of the destination bank
`beneficiaryId`	string (UUID)	No	Quote a saved beneficiary; the rail and destination country are read from it

Quoting a specific withdrawal method

Fees are configured per rail, so an ACH and a wire to the same bank are usually priced differently. Pass withdrawal_method to quote the rail you will actually send on:

`withdrawal_method`	Rail
`ach`	Domestic US ACH — settles in business days, cheapest US rail
`domestic_wire`	Domestic US wire (Fedwire) — same-day, priced above ACH
`international_wire`	Cross-border wire (SWIFT)
`local_transfer`	In-country transfer (e.g. NGN bank transfer)
`crypto_usdt` / `crypto_usdc`	Stablecoin payout
`mobile_money`	Mobile money payout

curl -X POST "https://api.rolla.xyz/api/v1/external/wallet/fee" \
  -H "X-API-Key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "currency": "USD",
    "transactionType": "withdrawal",
    "amount": 100000,
    "withdrawal_method": "ach",
    "destination_country": "US"
  }'

Swap "ach" for "domestic_wire" or "international_wire" to compare rails before deciding which to send on — everything else in the request stays the same.

Omitting withdrawal_method quotes the currency-level fee, which may not be what the withdrawal is charged if a rail-specific fee applies to your account. Always send the rail you intend to use.

Quoting a saved beneficiary

If you are paying a saved beneficiary, pass beneficiaryId instead and the rail and destination country are taken from that beneficiary — no need to restate them:

curl -X POST "https://api.rolla.xyz/api/v1/external/wallet/fee" \
  -H "X-API-Key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "currency": "USD",
    "transactionType": "withdrawal",
    "amount": 100000,
    "beneficiaryId": "c3d4e5f6-a7b8-9012-cdef-123456789012"
  }'

Anything you send explicitly wins over the beneficiary’s own values, so you can quote a different rail for an existing beneficiary by supplying withdrawal_method alongside beneficiaryId.

The beneficiary must belong to your account. An unknown beneficiaryId returns a 400 rather than falling back to a default fee — a quote never silently prices a different rail than the withdrawal will use.

FX payouts

For a cross-currency payout, add recipientCurrency. The response then also carries feeInRecipientCurrency:

curl -X POST "https://api.rolla.xyz/api/v1/external/wallet/fee" \
  -H "X-API-Key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "currency": "USD",
    "transactionType": "withdrawal",
    "amount": 100000,
    "recipientCurrency": "NGN"
  }'

Call this endpoint before initiating a withdrawal or swap to show your users the exact fee they’ll be charged. Send the same withdrawal_method (or beneficiaryId) you will send to POST /wallet/withdraw so the quote matches the charge.

Authorizations

X-API-Key

string

header

required

Your Rolla API key

Body

application/json

currency

string

required

3-letter currency code

Required string length: 3

Example:

"NGN"

transactionType

enum<string>

required

Type of transaction

Available options:

deposit,

withdrawal,

swap

amount

number

required

Transaction amount in the smallest unit (kobo for NGN, cents for USD)

Example:

5000

recipientCurrency

string

For FX payouts — the currency the beneficiary receives. The response then also carries feeInRecipientCurrency.

Required string length: 3

Example:

"NGN"

withdrawal_method

enum<string>

Payout rail to price. Fees are configured per rail, so an ACH and a wire to the same bank are usually priced differently — send the rail you will actually withdraw on. Omitted, the currency-level fee is quoted.

Available options:

ach,

domestic_wire,

international_wire,

local_transfer,

crypto_usdt,

crypto_usdc,

rolla_transfer,

mobile_money

Example:

"ach"

destination_country

string

2-letter country code of the destination bank, for fees scoped to a corridor.

Required string length: 2

Example:

"US"

beneficiaryId

string<uuid>

Quote a saved beneficiary. withdrawal_method and destination_country are read from it when not supplied explicitly. An id that does not belong to your account returns a 400.

Example:

"c3d4e5f6-a7b8-9012-cdef-123456789012"

Response

Fee calculated successfully

success

boolean

Example:

true

message

string

Example:

"Transaction fee retrieved successfully"

data

object

Show child attributes

Overview

Banks

Account Lookup

Transactions

Wallet

Beneficiaries

Teams

Account Onboarding

Webhooks

Get Transaction Fee

Example Request

Example Response

Parameters

Quoting a specific withdrawal method

Quoting a saved beneficiary

FX payouts

Authorizations

Body

Response

​Example Request

​Example Response

​Parameters

​Quoting a specific withdrawal method

​Quoting a saved beneficiary

​FX payouts

Authorizations

Body

Response

Example Request

Example Response

Parameters

Quoting a specific withdrawal method

Quoting a saved beneficiary

FX payouts