Look up an external account for payment

Lookup an external account by ID to determine supported currencies and exchange rates. This endpoint helps platforms determine what currencies they can send to a given external account, along with the current estimated exchange rates and minimum and maximum amounts that can be sent.

GET /receiver/external-account/{accountId}

Look up an external account for payment

cURL

curl --request GET \
  --url https://api.lightspark.com/grid/2025-10-13/receiver/external-account/{accountId} \
  --header 'Authorization: Basic <encoded-value>'

200

{
  "sendingCurrency": {
    "code": "USD",
    "name": "United States Dollar",
    "symbol": "$",
    "decimals": 2
  },
  "supportedCurrencies": [
    {
      "currency": {
        "code": "USD",
        "name": "United States Dollar",
        "symbol": "$",
        "decimals": 2
      },
      "estimatedExchangeRate": 1.08,
      "min": 1,
      "max": 1000000,
      "exchangeRate": 0.925,
      "minSendingAmount": 100,
      "maxSendingAmount": 500000
    }
  ],
  "lookupId": "Lookup:019542f5-b3e7-1d02-0000-000000000009",
  "accountId": "ExternalAccount:e85dcbd6-dced-4ec4-b756-3c3a9ea3d965",
  "requiredPayerDataFields": [
    {
      "name": "FULL_NAME",
      "mandatory": true
    }
  ]
}

Authorizations

Authorization · string · header · required

API token authentication using format <api token id>:<api client secret>

Path Parameters

accountId · string · required

System-generated ID of the external account

Example:

"ExternalAccount:e85dcbd6-dced-4ec4-b756-3c3a9ea3d965"

Query Parameters

senderUmaAddress · string

UMA address of the sender (optional if customerId is provided)

customerId · string

System ID of the sender (optional if senderUmaAddress is provided)

sendingCurrency · string

Currency code the sender will send from (e.g., USD). Selects which of the sender's configured currencies the response is priced against: it is echoed back as the response's sendingCurrency, and the minSendingAmount/maxSendingAmount bounds are denominated in its smallest unit. Defaults to the sender's default currency.

Response

200

application/json

Successful lookup

sendingCurrency · object · required

The currency the payment is sent from — the sender's default, or the one named by the sendingCurrency query parameter. Every estimatedExchangeRate in supportedCurrencies converts from this currency, and any minSendingAmount/maxSendingAmount is denominated in its smallest unit.

Show child attributes

supportedCurrencies · object[] · required

List of currencies supported by the receiving account

Show child attributes

lookupId · string · required

Unique identifier for the lookup. Needed in the subsequent create quote request.

Example:

"Lookup:019542f5-b3e7-1d02-0000-000000000009"

accountId · string · required

The external account ID that was looked up

Example:

"ExternalAccount:e85dcbd6-dced-4ec4-b756-3c3a9ea3d965"

requiredPayerDataFields · object[]

Fields required by the receiving institution about the payer before payment can be completed

Show child attributes