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POST
/
v1
/
cards
/
:id
/
top-up
curl -X POST https://api.usenaive.ai/v1/cards/card-uuid-1/top-up \
  -H "Authorization: Bearer nv_sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "amount_cents": 5000
  }'

{
  "checkout_url": "https://checkout.usenaive.ai/c/pay/cs_live_...",
  "session_id": "cs_live_def456",
  "card_id": "card-uuid-1",
  "amount": 5000,
  "expires_at": "2026-03-05T12:30:00Z"
}
Creates a hosted checkout session to add funds to an existing card. The card balance is updated after successful payment.

​
Request Body

ParameterTypeRequiredDescription
amount_centsnumberYesAmount to add in cents (minimum 100 = $1.00)
curl -X POST https://api.usenaive.ai/v1/cards/card-uuid-1/top-up \
  -H "Authorization: Bearer nv_sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "amount_cents": 5000
  }'

{
  "checkout_url": "https://checkout.usenaive.ai/c/pay/cs_live_...",
  "session_id": "cs_live_def456",
  "card_id": "card-uuid-1",
  "amount": 5000,
  "expires_at": "2026-03-05T12:30:00Z"
}

​
CLI

naive cards top-up <id> --amount 5000

​
MCP

Tool: naive_cards_topup 
{
  "card_id": "card-uuid-1",
  "amount_cents": 5000
}
May require approval. If the user’s Account Kit gates cards, an agent (API-key) call (cards.topup) returns 202 { "status": "pending_approval", "approval_id" }. A human approves it via Approvals. See Approvals.