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.
Request
- Base URL: https://laso.finance
- URL: https://laso.finance/search-merchants
- Auth: API key in header Authorization
Query parameters
Search query — the merchant name to search for (e.g. "amazon", "netflix")
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
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.