Reference
List options for a dropdown field
GET
The URL is the options_url in the card product's cardholder_fields. Fixed options are returned as-is; dictionary fields return only enabled values that the requirement's provider supports. When the field has a parent field (parent_field), pass the parent's value as a query parameter named after the parent field (such as ?country=JP); without it the list is empty.
merchantApiKeymerchantTimestampmerchantNoncemerchantSignatureheader
X-API-KEY<token>Merchant API key (starts with upk_, also accepts api-key); signing headers are also required
header
X-Timestamp<token>Unix timestamp in seconds, within 300 seconds of server time
header
X-Nonce<token>Unique per request; cannot be reused with the same credential during the timestamp validity window
header
X-Signature<token>Hex HMAC-SHA256 signature (either letter case) of the method, full path, timestamp, nonce and body digest
requirementId*stringfield*stringOptions
application/json- response
data*array<>curl -X GET 'https://sandbox.getupp.net/api/v1/requirements/rqs_01m5xsrnexe3wd4etjpvk8cy5m/fields/town/options'Example Response
{ "data": [ { "value": "tokyo", "label": "Tokyo" }, { "value": "osaka", "label": "Osaka" } ]}