Search merchant spend data

Search Laso's merchant database for confirmed spend data for a given card type. Returns whether the card was accepted, not accepted, or unknown at each merchant.

Use card_type to search by the USA prepaid card (Non-Reloadable U.S., the default) or the international prepaid card (Non-Reloadable International). USA searches exclude merchants with non-US country-code TLDs; international searches do not.

Important: This database only contains merchants where Laso users have previously attempted a transaction. A merchant not being listed, or being listed as unknown, does NOT mean the card won't work there — it just means it hasn't been tried yet. If a merchant is listed as accepted, you can confidently use the card there. If listed as not_accepted, the card will fail at that merchant.

Banking and money-transfer merchants are always returned as not_accepted with a restriction_note, whatever the transaction history shows. Spending there counts as a transfer of value and is not supported on any card.

Requires a Bearer token from /auth or /get-card.

get/search-merchants

Request

  • Base URL: https://laso.finance
  • URL: https://laso.finance/search-merchants
  • Auth: API key in header Authorization

Query parameters

qstring required

Search query — the merchant name to search for (e.g. "amazon", "netflix")

card_type'Non-Reloadable U.S.' | 'Non-Reloadable International'

Which card type to search acceptance for. Defaults to Non-Reloadable U.S. if omitted (preserves existing client behavior). Pass Non-Reloadable International to search for international prepaid card acceptance.

Response

Merchant search results

querystring

The search query that was used

countinteger

Number of merchants returned

card_typestring

The card type results are filtered for

notestring

Important caveat about the data — this database only includes merchants where users have previously attempted transactions

Example response

{
  "merchants": [
    {
      "name": "Amazon",
      "url": "amazon.com"
    }
  ],
  "card_type": "Non-Reloadable U.S."
}

Changes

No recorded changes to this operation across all 3 revisions of this API.