BillKit/Docs Console
Subscriptions

Reauthorize payment method

Start the flow for a customer to replace their payment method.

POST/v1/subscriptions/{subscription_id}/reauthorize_payment_method
Operation reauthorize_payment_method · Scope subscriptions:write · Spec snapshot 2026-09-13

Parameters

ParameterDescription
subscription_idstring · pathrequiredNo description in the spec.
return_urlstring (uri)requiredMust be an absolute URL. At most 2083 characters.

Returns

Returns a ReauthorizationResponse object.

Errors

Status Cause
401 Missing or invalid API key.
403 Key is missing the subscriptions:write scope.
404 No such object, or it belongs to the other mode.
422 Validation Error
429 Rate limited. Back off and retry.
Request · curl 
curl -X POST https://api.billkit.eu/v1/subscriptions/sub_9XKp2vQ1/reauthorize_payment_method \
  -H "Authorization: Bearer $BILLKIT_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"return_url":"https://acme.example/welcome"}'
Response · 200 OK 
{
  "checkout_url": "https://acme.example/welcome",
  "object": "reauthorization",
  "operation_id": "operation_9XKp2vQ1",
  "subscription_id": "sub_9XKp2vQ1",
  "verification_amount_cents": 1900,
  "verification_currency": "EUR"
}